Mould-making techniques

Mould-making techniques
Mould-making
techniques
2
Mould-making techniques
The CC-Silicone System
At the core of mould manufacturing is the model. Almost every
object is suitable. In general, a master model of the object
is prepared. This requires artistic or technical skills,
because there are different ways for making this
manually:
• Modelling with a modelling clay or plasticine
• Carving in wood or wax
• Gouging out the sculpture from soapstone or
gypsum
• Mounting and shaping with wood, glass, paperboard, styrofoam, plastic, or metal
The methods are known, the techniques are not new. Apparently,
nothing has changed from the very beginning, because the oldest technique of lost wax is practiced today as it has been for centuries. (The lost
wax technique was first used in the 4th century B.C. in Egypt). This method
involves making a replica in a lost form*, a procedure that constitutes the number one
method even today in the artistic glass melting field, by Pâte de Verre and bronze casting.
Despite sophisticated technology, more refined tools and modern aids, it is still not possible to apply a similar, cost-effective method in
the area of product development. This is worth mentioning, particularly for prototyping, where after producing the first model, a replica
will be cast for practical testing, or will be “printed” with the newest state-of-the-art 3-D printer. However, even that is insufficient,
because something still needs to be changed a bit afterwards, improved, and further developed. It is only possible then to make the
first practical test with this replication model, which normally necessitates further model changes. As a consequence, a further test
model must be produced, a new attempt made... – all according to the known method “learning by doing”.
This is only a small example of the diversity of mould-making technical application that is often faster to implement than theoretical
calculations or computer simulations (rapid prototyping). The tangible, direct model is understandable to non-specialists as well. It is
clear, comprehensible, and can be observed from all angles, and tested in a practical way. This is important, because not only mechanical aspects and function, but also aesthetics, handling and design are important development criteria.
The most important prerequisite for this is the production of a required form, quickly available, and without great technical effort. This
moulding implies that the materials and the accessories are universally usable so that a fully functional mould can be quickly made
without a great deal of prior knowledge.
The CREARTEC mould-making techniques system is based on these criteria. It essentially consists of four different silicones, all of
which can be combined and mixed with each other. This unique materials program is completed by additional accessories of a modular
system, developed especially for it. With these, the prepared mould making material can be changed and adjusted individually to suit
its intended application, so that it precisely fulfils its function:
•
•
•
•
The curing time can be reduced or extended
The silicon viscosity can be modified. It can be adjusted to be more fluid and free-flowing, or thicker. Additionally, it may be thixotropic, i.e. drip fast, or can be made as a spatula-ready paste.
The silicones can be mixed with each other. This creates an elastic, viscoelastic, solid, extremely form-stable, or highly elastic
moulding material
A flexible, elastic moulding material can be made from a rigid, heat-resistant silicone, for the production of moulds suitable for
direct casting of tin figures using low-melting point metals.
*Lost form: The model is made of wax and jacketed with a gypsum-sand mixture („HGF“ Hot Glass Form casting material, 56 102). Thereafter, the
mould is strongly heated, which results in the wax flowing from it, and at the same time hot bronze or molten glass flowing in. After cooling and
solidification of the bronze/glass cast part, the outer form case is destroyed, fulfilling the function of a lost form.
Mould-making techniques
The mould-making range
The CREARTEC mould-making technique is divided into eight basic
product areas, which are completed by special additional articles in
the form of a modular system:
Bas-reliefs without undercuts
(Coins, seals, plaques, fittings)
Models with small undercuts
Handles, bowls, furniture trim, etc.
Reliefs with extreme undercuts
Full plastic figures, techn. mouldings
Wall and ceiling reliefs, surface structures
Partial impressions of sculptures, models, devices
Moulding wet clay models
Relief panels, sculptures, design surfaces
Figures and techn. used parts
Screws, tools, equipment
Skin-like coatings on sculptures
Big figures (together with an abutment)
Figures from low-melting alloys
Busts, components, tools
Manufacture of rubber-like mouldings
Wheels (model), play figures, techn. mouldings
Manufacture of rubber-elastic Mouldings
Decoration, bending and moving parts
Potting of electronic components
Embed blackbox circuits
Schokomould
Silcodupli - VHE
Silcotrans - NVT
Silicone - Rubber - HV
Silicone - Rubber - HE
Silicone - Rubber - HB
Silicon-Kautschuk - NVE
Silicone -Rubber - NV
Formaform
Latex-Modellfix
Latex moulding emulsion
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Creaform
Which material fits for which moulding?
Silicon-Compound
1. Creaform quick-casting-paste
2. Mouldable quick casting silicon compound
3. Dip mould manufacturing with latex emulsions
4. Economic moulds made of Formaform
5. The silicone mould system
6. Special silicones
7. Chemical supplements (modular system)
8. Food moulding with Schokomould
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3
4
Mould-making techniques
1. Creaform quick casting paste
Creaform
The casting alginate (powder) based on purely natural ingredients is free of
harmful substances (lead and cadmium). It is ecological because it contains
no preservatives. In order for this material structure to have sufficient stability after the emergence of a negative form, it is also mixed with micro-fine
silane shred. After mixing with water, the result is a stable form, rather than
the usual sponge-like negative mould. When mixing the Creaform powder,
it first shows a gel-like fluid consistency, which coats the moulding object,
almost without air bubbles. However, it is still riddled with small crumb-like
particles that dissolve within a minute or two, and cause the mould to solidify
to a foam-like consistency, and form a stable skin cover. Creaform is dimensionally stabilized, which allows the replicated objects to be readily removed
from the mould. The mould retains its original size and shape.
After pouring with casting material, the no longer needed mould can be disposed of in household waste, since the material has an excellent, environmentally friendly biocompatibility.
Mixing ratio in terms of weight: 3 parts of cold water and 1 part Creaform powder
100 g of powder mixed with 300 g of water yields 400 g quick casting material. This corresponds to a material volume of 340 ml. The
processing time from mixing material to complete rubber-like hardening is approximately 6-10 minutes. After that, the mould is ready,
and the ceramic casting compound Artestone (Article 56 011) can be poured immediately.
Important: no plaster or similar casting materials should be used, since they are hygroscopic (water-attracting) and would absorb the
water still contained in the mould wall. This would lead to a change in the surface of the replica that results in an uneven structure
(orange peel). By using hydrophobic* Artestone that does not happen.
If the mould is to be filled with other casting materials such as polyester, polyurethane, wax, casting soap, etc. it must first dry, and can
be filled 60 minutes later. (The inner wall of the mould is then almost dry, thus compatible with the other mentioned casting materials.)
Creaform is self-releasing. This property is required for moulding non-absorbing models made of wood, stone, ceramic, porcelain,
glass, metal, plastic, rubber, etc.; it does not need any additional release agent.
Important: the models must be wetted (moistened) before moulding!
Because of its natural, trouble-free and skin-neutral composition, Creaform is also suitable for the creation of body mouldings, for
example hands, feet, and other body parts.
Technical Properties:
Test method
Value
Colourpowdery materialblue
OdourCreaform powderneutral
Mixing ratio volume mixing 1:1
Mixing ratio weight mixture water powder = 3 : 1
Working timetiming3–4 minutes
Density at 20 ° C
DIN 53217
0.28 g/cm3
Alkaline value
pH 7.5–8 %
Creaform is supplied with detailed use instructions.
*hydrophobic comes from ancient Greek and means „water-shunning“.
60 201
Creaform (quick casting paste)
225 g
Plastic bucket
PE 6
60 202
Creaform (quick casting paste)
500 g
Plastic bucket
PE 6
60 203
Creaform (quick casting paste)
1000 g
Plastic bucket
PE 6
60 204
Creaform (quick casting paste)
4000 g
Plastic bucket
PE 1
Mould-making techniques
Creaform curing retarder
For certain impression projects, the normal working time may be too short. To get around this
problem, this curing retarder was developed. It extends the working and curing time by about
3 – 4 minutes. The amount of the retarder required is about 1 – 5 % (where approximately 1%
results in a delay of one minute). The curing retarder is mixed with the amount of water needed
for the moulding, and then added to the Creaform powder and stirred. In this case, the result is a
uniform, slow cure.
60 206
Creaform Curing Retarder
25 ml
Plastic box
PE 3
Complete package
PE 3
Creaform reproduction-set
This idea package contains the complete materials for moulding one adult or two small children’s
hands. The idea of getting a model of your own hand is not only inspiring, but also the fact that
this moulding process takes no longer than an hour is impressive. The procedure is as follows:
The Creaform powder is mixed with water in the supplied container. The hand to be modelled
is placed in the mixture, and withdrawn about 3-4 minutes later. Then the supplied Artestone®
casting powder is mixed with water until it is a creamy porridge. It is then poured into the selfmade form. Just 30 minutes later, the ceramic casting material will have hardened. The finished
reproduction model of your own hands can be removed (extracted) from the mould and stands as
a unique decorative object.
Mixing ratio in terms of weight: 3 parts of cold water and 1 part Creaform powder
The package was well thought out and put together, so that the delivery container can also be a
mould holder. It contains:
1 package Creaform
450 g
1 package Artestone 1000 g
1 working instructions
60 211
Creaform reproduction-set
Adding Creaform and water into the
mixing container
The successfully moulded hand and
reusable mould.
1450 g
Mixing the materials
Moulding of the hand
The mould is finished. The hand can be
removed, and the finished mould can be
filled with casting material
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6
Mould-making techniques
2. Silicon-Compound
Silicon-Compound (quick moulding material)
A fully functional mould can be produced within minutes and is immediately ready for filling with a
casting material. This is accomplished by using this universal quick-moulding material. In addition to
rapid moulding, one can dispense with much of the additional work required in producing a mould.
Yet there are even more advantages to use of this silicone moulding composition:
Silicon-Compound can be applied without a release agent on every object or surface. Because this is
so easily possible, it also eliminates a casting frame. In addition, all these features allow you to immediately create a mould with this material at any time and place. Remove the two different looking
silicone compound materials (white and brown) from the packaging, mix them by kneading them in
a 1:1 weight proportion and they are ready for use.
The light, dry impression material is either placed directly on the moulding object, or rolled into 2-3
mm thick patties, and distributed by pressing or shaping on the moulding object. The material cures
in within 5 minutes. Therefore, it is advantageous that you immediately knead a further amount of
material, if more is needed, to apply to the already cured mould surface and connect to it seamlessly.
This makes it possible to cover even big pictures and sculptures quickly and securely, or to produce
a solid, contiguous, elastic, and self-sustaining form.
Silicon-Compound is self-releasing, so it does not combine with the original, or the reproduction model. The final shape can be poured
with all casting materials: wax, polyesters, polyurethanes, casting soap, plaster, cement, or ceramic casting materials.
For other product and application information, see the detailed processing instructions that come with each package.
Technical Details:
Test Method
Unit/Property
Component A/Bkneadable materialwhite-brown
Odoursilicone materialodour-neutral
Mixing ratio:
in terms of weight
1:1
Pot lifemix/knead time40–60 sec.
Total curing time
at 20°C
4–5 minutes
Shore A hardness after 8 days
DIN 53505/ISO 868
40
Skin compatibility
pH-value
5–6 (pH skin neutral)
Flexural strengthN/mm2/ISO 373.6
Elongation at break
ISO 37 %
350
Tear strength
N/mm ASTM D 624 B
> 12
Security measures are not necessary when processing this silicone!
> an application video can be found on our website: www.creartec.de
The components A and B are accurately
weighed in 1:1 ratio.
Both materials are carefully kneaded
together.
The silicone material is placed on the work
surface and rolled out with a rolling pin or
bottle to a sheet of dough, then it must be
pre-react for one minute. The material is
then ready to use.
60 445
Silicon-Compound
300 g
SB-Set
PE 6
60 446
Silicon-Compound
600 g
Packet
PE 6
60 447
Silicon-Compound
1000 g
Packet
PE 3
60 449
Silicon-Compound
5000 g
Packet
PE 1
Mould-making techniques
3. Dip moulding process with latex emulsions
The latex obtained in Thailand and Malaysia as milky sap from rubber trees is mainly known in chemistry as an
elastomeric polymer dispersion. It is ideal as a dip-coating composition for the production of thin-walled, elastic
rubber moulds or universally usable rubber parts. Latex is a first component material that cures firm, dimensionally stable, and elastic, in connection with the atmospheric oxygen.
Formalate – > low ammoniated latex milk <
The latex emulsion (low ammoniac) pre-cured in a manner similar to natural rubber
and preserved with a small amount of ammonia, is particularly suited for producing
seamless tube shapes. Therefore is the most commonly used moulding material.
To produce a mould, the original model is completely immersed into liquid latex. After
withdrawing the model, a thin latex skin is formed, and must be allowed to dry.
Following drying, a next immersion is performed. This kind of moulded skin preparation must be repeated several times, and is dependent on the size and the extent
of the moulded form (the thicker the model, the more immersions are required). It
usually takes 4-5 immersions to create a stable, durable form.
The final latex mould is characterised by a high moulding accuracy and long service
life. Therefore, moulds made of Formalate are particularly well suited for casting
with ceramic materials, cast plaster, wood stone, wax, casting soap, polyester and
polyurethane resins.
The same latex is also used for shoe soles (latex soles), to make foot and floor mats,
technical mouldings (rubber seals), or as a repair material for tires. For example, it is
poured into bicycle and car tires. In case of a tire leak, the out flowing air carries with
it a portion of the latex located in the tube nearby, thus sealing the hole.
The liquid Formalate is ivory-coloured, and shows an ochre hue after curing. It contains no harmful or harsh ingredients. It can therefore be used by young people and
students as a learning material for the first production tests of a seamless mould
(tube form).
Technical Details:
Test Method
Unit/Property
Colourfluid latexivory
Odourfluid latexammonia-like
Curing time per dipping cycle
temperature dependent
30–60 minutes
Solids content %TSC60.5
Low level of ammonia content
%
0.3 min.
Density at 20 °C
DIN 53217
0.95 g/cm3
Module
Elongation 700 %, MPa
11–14
Elongation at break %
DIN 53504 S1 / ISO 37
800–950
Tensile strength
ASTM D 624 B MPa
25–29
Viscosity dynamic at 26 °C
Brookfield
120 max.
Alkaline valuepH9.5–10.5
Shrinkageafter coagulation7.8 %
Model coated with
latex
Finished latex form
Formalate is supplied with a detailed application instructions and a balloon*.
*The balloon is inflated somewhat by the use of latex, knotted airtight, and wrapped in the partially emptied latex box.
Due to the reduced oxygen content in the latex, the latex container therein does not thickened, thus retaining its existing consistency.
Cast model made of Artestone
60 151
Formalate „low ammoniac“
300 ml
Plastic box
PE 6
60 152
Formalate „low ammoniac“
800 ml
Plastic box
PE 6
60 154
Formalate „low ammoniac“
2500 ml
60 156
Formalate „low ammoniac“
20 l
Plastic bottle
PE 2
Plastic canister
PE 1
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8
Mould-making techniques
Formalate Special – odourless latex emulsion
This rubber emulsion based on natural rubber is completely odourless. It contains an odourless potassium hydroxide solution as preservative instead of a strong-smelling ammonia
compound (Formalate standard). This makes handling more pleasant and allows use of the
latex a variety of completely different applications, not only as a moulding material, but also
for such things as the production of films for latex clothing, soles-nap-latex (applied in small
points on the soles of slipper socks or knitted slippers to prevent sliding or slipping), rubber
gloves, balloons, inflatable toys, etc.
Beyond that, the material has the same processing properties as normal latex, and nearly
identical product characteristics as well. Due to its special composition, it is priced a bit
higher than latex containing ammoniac.
Original model
the latex mould produced from it
finished replica of Artestone
Colouring latex: Latex, either with ammonia, or odourless (modified with a potassium hydroxide solution) can also be dyed with specially developed toning colours (60 176). This
is done for example if you need coloured latex for latex clothing, balloons, inflatable swim
toys, etc.
Technical Details:Test MethodUnit/Properties
Colourfluid latexivory
Odourfluid latexodourless
Curing time per coat
temperature dependent
30 – 60 minutes
Solids content %TSC59.5 %
Alkalinity%0.40 min.
Density at 20 °C
DIN 53217
0.95 g/cm3
Module 700 % elongation, MPa
9 12
Elongation at break %
DIN 53504 S1 / ISO 37
800 950
Tensile strength
ASTM D 624 B MPa
19 23
Viscosity dynamic at 26 °C
Brookfield
400 max.
Alkaline valuepH9.0 – 10.0
Shrinkage% linear7.6
„Odourless“ Formalate is supplied with a detailed application instructions and a balloon*.
*The balloon is partially inflated by the use of latex, knotted airtight, and packed in the partially emptied latex box. Due to the
reduced oxygen content in the latex container, the remaining latex does not thicken, and thus retains its original consistency.
60 162
Formalate Spezial – „Odourless“
300 ml
Plastic box
PE 6
60 163
Formalate Spezial – „Odourless“
800 ml
Plastic box
PE 6
60 164
Formalate Spezial – „Odourless“
2500 ml
Plastic bottle
PE 2
60 165
Formalate Spezial – „Odourless“
20 l
Plastic canister
PE 1
Mould-making techniques
Latex coalescing agent
Latex does not adhere particularly well to smooth glass, ceramic, metal, and plastic surfaces.
In order to use the latex for moulding models made of these materials, they need to be coated
with a thin layer of latex coalescing agent prior to latex immersion. The coalescing agent ensures a consistent, and especially faster and thicker skin formation, which is why it
is always applied thinly to all such models as curing activation agent. Since the
casting models are coated only once prior to use, the contents of a 100 ml bottle
is sufficient for a great number of casting models.
60 161
Latex coalescing agent
100 ml
Plastic bottle
PE 6
Latex thickener
Dipping the models in liquid latex is not always possible. In order to cover large objects with
a uniformly thick skin, they are placed in an appropriately large collecting container and
doused with latex. It is advantageous if the material is a little more pasty. It then forms
a stronger application at each coating, which coagulates and builds an evenly thick
skin layer. To achieve this, the latex is mixed with 1-3% latex thickener and becomes
viscous (thixotropic). Due to its pasty consistency it can be also applied more easily
onto vertical objects (walls, figures, etc.). It then forms a uniform, compact form of the
skin that can be removed as a textured skin or film.
60 171
Latex thickener
50 ml
Plastic bottle
PE 6
60 172
Latex thickener
100 ml
Plastic bottle
PE 6
Rubber painting colour
These special colours allow items made of latex and other rubber materials, such as: masks, tires,
rubber sleeves, gloves, swim caps, swim toys and latex fabrics, to be decoratively painted. This
rubber paint adheres not only to latex, but also on ceramic, porcelain, ceramic models from
casting materials, glass, metal, wood, polythene bags, various plastics (not PVC), as well as
synthetic fabrics, such as umbrellas, rainwear, also on rubber boots, rubber balls, synthetic
leather bags, pencil cases etc. The colour dries to a satin finish within 60-100 minutes
depending on the ambient temperature, is elastic, and cannot be removed again.
colours:
08
medium red
14
violet
22
medium blue
36
green
63
orange
99
colourless
68
white
78
black
46
sunny yellow
Rubber paint hardens with oxygen in the air. Therefore, the filled aluminium colour tubes must always be carefully sealed.
72 171
Transparent rubber paint
20 ml
Tube
PE 6
72 172
Transparent rubber paint
50 ml
Tube
PE 6
72 176
Opaque rubber paint
20 ml
Tube
PE 6
72 177
Opaque rubber paint
50 ml
Tube
PE 3
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Mould-making techniques
Formalate Mould Making
You can dip almost any object in the latex material and produce a mould out of it. It is important
to note that the model is not allowed to have any gaps. By the term “gap” we mean any kind
of opening. That is why a figure with open legs on a base, for example, is not suitable for this
casting technique. For this, a two-part silicone form must be produced. The so-called „cone
figures“, which do not have any openings, are needed to produce castings using latex.
After completion of the latex form, a suspension fixture (hanger) is required to suspend
the mould during the filling of casting material and the following curing. The support is
usually made of a sturdy cardboard, from which a round or oval opening is cut to fit the
mounting form. The opening must be large enough that the shape can be inserted and
placed exactly at the end of the bead shape, over the open edges of the cardboard. To
make this possible, a precisely cut to fit 6–8 mm thick plywood piece is either glued or
screwed on to the base of the model before moulding. The piece is 10–20 mm bigger than
the mould base and therefore extends slightly beyond on all sides. This is important, so that the
mould bead of the final mould rests securely on the mentioned cardboard border.
On the back of the base plate, fasten a small screw or a screw hook and attach an approx.
60–80 cm long cord (string).
Dipping into latex
The figure is ready for dipping into latex. Smooth mould parts made of metal, glass, ceramics,
porcelain and plastic should first be brushed with latex coalescing agent (60 161). On one hand,
the coalescing agent causes the latex to adhere well, as otherwise it would drain off the smooth
surfaces. On the other hand, it ensures that a slightly thicker layer of latex is deposited on the
immersion model, accelerating the mould-making process.
The model is fully immersed once in the latex, withdrawn again, and then the adherent latex
must be spread with fingers. This eliminates possible air bubble inclusions. After re-immersion
into the latex, the coated model is pulled out and tied with the cord to a support located above
the latex container holder, for example a cabinet handle, back of a chair, etc. with about 10 cm
free over the container. This offers the advantage that dripping latex falls back directly into the
supply container.
The mould bead
The thin latex layer on the coated model now needs to dry. This may take 30 to 60 minutes
depending on the ambient temperature. After the latex has dried and adheres as a thin skin on
the model, the model is once again immersed in the latex until the base is completely covered
with latex. This dipping process is repeated twice. Only then is the thin layer of latex, adherent
to the base surface, pierced with a knife, and the thin latex skin on all sides rolled back to the
base edges, so that it sticks like a tight bead around the side edge of the base. This is followed
by another immersion over this bead edge. This is important, because the previously prepared
bead must completely embedded again in the latex material.
hanger
plywood board
Immersion into the latex is required 4–5 times for simple figures with a height up to 12 cm.
Larger models, especially thicker ones, must be dipped 6 or 7 times.
After the last coat, the mould on the model form must post-cure for one day, meaning „coagulate“ (clot) in technical jargon.
Releasing the mould from the model
To be able to easily remove the finished mould from the model, it is rubbed externally with
detergent and water. Then the bead is carefully peeled from the base at different points and
pulled down directly off the model. The other hand must hold the base, so that the mould can
peel off almost by itself from the model. Due to the slippery water-detergent application, the
latex skin slips off easily.
The still adhering soap residues on the mould are washed off with cold tap water, so in the end
we have a wet, but clean form. If the inside was twisted to the outside through rolling or peeling
off, it must be rolled back and the mould is then immediately ready for filling with the provided
casting material.
undercuts
form bead
Mould-making techniques
Filling the mould with a casting material
For mounting the form use the aforementioned stable cardboard.
Next, the casting material needed for the filling of the mould is mixed and poured into the
completed mould until it is half full. The mould is then carefully removed from the cardboard
holder and kneaded. This is very important because bubbles, which have settled between the
mould edge and casting material into the mould, will be pushed away. The success of this work
is visible when small air bubbles rise to the surface of the casting material.
Pay special attention to toes and other protruding mould parts. It is easiest if they are pressed
into the form, and then pulled out again. Air bubbles present here will be eliminated.
The mould is then again suspended from the support and completely filled with the moulding
composition. Make sure that it is not completely filled to the rim. If so, the replica model would
get an ugly high pedestal, which does not look good. Therefore, the casting composition should
only be filled up to the bead in the mould. Depending on which ceramic casting material is used,
which is normally hardened after 30 minutes, the completed model can then be immediately
removed from the mould. For this purpose, it is again rubbed with the water-soap mixture from
the outside.
The latex mould can be reused often, sometimes more than a hundred times, which is why
many reproduction models can be cast in this self-made form.
Besides the aforementioned ceramic casting materials, such as Artelin (56 006), Artestone
(56 011) or Woodstone (52 061), casting is also possible with polyester resins, polyester casting
wood (52 202) and polyester casting resin (51 012). As these resins contain aggressive solventcontaining binders, the mould must first be coated or spread with the mould release agent
(51 101). After drying of the release agent in the mould, the selected resin mixture is added.
Other interesting information about this latex impression technique can be found in the
book: „Make your own moulds“ (05 172).
The figures can also be given classic aging effects using
oxidizing agents, for example, verdigris or blue patina.
The models cast in the mould can be artfully refined with various colours and glazes; therefore it is possible to stylishly
imitate all material effects: ceramics, porcelain, wood,
stone, metal, bronze, copper, tin, iron, rust-aging
effect verdigris or blue patina, etc.
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12
Mould-making techniques
Formalate-Modellfix
In contrast to conventional latex, Formalate-Modellfix is creamy. This thick liquid latex is well suited for coating relief-like image panels and the reproduction of dioramas, architectural models,
freshly modelled clay tablets (reliefs, grave panels, signs and models). There is no other more
suitable impression material than Formalate-Modellfix, especially for moulding still wet clay models, because it settles perfectly on the surface and thus captures all the fine details exactly.
Despite that, it can easily be peeled off after the latex mould hardens.
In the past, such a model was cast in plaster in order to produce a negative mould and the plaster
removed and washed out of the mould, which was then coated with petroleum jelly. Then new
plaster was mixed and poured into the mould. After hardening of the plaster, the positive mould
was removed from the plaster mould. This was very complicated, because most models broke
and were thus destroyed. This had the consequence that the clay model had to be modelled
again and the procedure had to be repeated again. That was in the past!
Direct transfer moulding of the clay model with Formalate-Modellfix is not only easier, but also
safer. Formalate-Modellfix is applied on all sides and edges of the clay model to form a coat
thickness of at least 12 mm, and is then lightly pressed with a flat wooden spatula to obtain a
smooth surface. A brush should not be used as this may damage the still soft clay structure.
The latex layer on the clay model combines with the clay, absorbing the condensation produced during the hardening of the clay. This
process even removes air pockets that might have been added by the latex material, so that precisely accurate casting is guaranteed.
The latex layer takes about 5-6 days to dry. In this case, the moisture absorbed from the model, together with the water present in the
latex, is eliminated, so that a leathery-solid, stable latex form is available that can easily be removed from the still soft clay model. It
can then be used intact for other applications or impressions.
For large models, it is recommended to additionally apply some plaster bandages on the latex form, so as to produce a plaster reinforcement that is so stable that the form is easy to fill, even with heavy casting materials.
The final latex mould can be filled with all the usual casting materials.
Technical Details:
Test Method
Unit/Properties
Colouras deliveredivory
Odouras deliveredodourless
Curing time
depending on film thickness 4–6 days
Solids contentTSC %61.8
Alkalinity%0.40 min.
Density at 20 °C
DIN 53217
0.91 g/cm3
Module 750 % elongation
9–12 MPa.
Elongation at break %
DIN 53504 S1 / ISO 37
850–980
Tensile strength
ASTM D 624 B, MPa
22–26
Viscosity dynamic at 26 °C Brookfield
400 max.
Alkaline valuepH9.8–10.0
Shrinkage% linear6.8
Formalate-Modellfix is supplied with detailed instructions for use.
60 166
Formalate-Modellfix
500 ml
Plastic tin
PE 6
60 167
Formalate-Modellfix
1000 ml
Plastic tin
PE 6
60 168
Formalate-Modellfix
2000 ml
Plastic tin
PE 3
Mould-making techniques
Instructions for use
The thick liquid latex is applied carefully with a wooden spatula onto
the still wet clay relief and distributed such that a uniformly thick surface results. It is important that the side edges of the model are also
covered with a thick layer of latex.
After the coagulation (hardening) of the latex composition, the finished mould is carefully removed from the clay relief. To accomplish
this, first the side edges and corners are lifted from the model. This
process is repeated several times at different angular edges, to form
the elastic shell that can be easily lifted from the model surface. Then
it has to harden for 1 to 2 days. This increases the life of the mould.
Only then is it coated with a release agent.
Depending on the rim height of the mould, it can now be filled with
any casting materials. For large models or those with a low edge, the
mould should be evenly covered with plaster bandages prior to removal from the model. This produces a plaster reinforcement stabilising
the mould.
The clay-modelled master model.
Partial view of a painted architecture model in the landscape formations
The clay model is fitted into a correspondingly large casting form and then
completely covered (smoothly spread) with Formalate-Modellfix.
A few days later the practical latex negative mould is ready for pouring a ceramic
casting material.
Latex tinting colour
Latex emulsions can be coloured with water-soluble pigments. A small amount of the latex composition is poured into a separate vessel, the powder pigment added and thoroughly
mixed in. The final colour paste is then added to the latex composition and thoroughly mixed. It
is important that prior testing be done to determine which pigment is the best-suited.
Colouring the latex with the specially developed liquid latex tinting colours is not only easy,
but also safe. To this end, the selected colour is stirred into the latex. Then colouring is
finished. Different colours can also be specifically mixed together, so any shade can
be produced.
For dyeing liquid latex it is important that the colour mixture is made very
intense, because the latex becomes lighter when drying and the colour also
lightens.
08
red
14
violet
21
blue
36
green
45
yellow
63
orange
68
white
78
black
60 176
Latex tinting colour
100 ml
Plastic bottle
PE 6
60 177
Latex tinting colour
250 ml
Plastic bottle
PE 3
13
14
Mould-making techniques
4. Economic moulds made of Formaform
The diversity of this interesting mould making range is shown by the following product
which is made of high quality meltable gel, especially designed for this mould-making
technique.
Formaform
Formaform is a synthetic, rubber-like mould making material, which is melted like wax in a water bath on
a hot plate, and is then immediately ready for moulding. The liquid moulding material is poured directly
into the casting mould model, where it immediately spreads evenly and creates the desired shape. 30 to
40 minutes later, the moulding composition is cool and can be removed as a complete mould of the model.
It must then post-cure for 1 - 2 hours before it can be used for moulding.
Formaform is a universal form of mould-making material with unique applications. Compared to silicone,
it is cheaper as an unsuccessful mould can be remelted at any time and reused to make a new one. The
failed mould is cut up with scissors into small pieces, remelted and reused for making a mould. A flawless
finished mould is . Recycling of this material is possible up to 6 times. A disadvantage however is that the
mould can only be used once, because it is neither heat nor water resistant. However, this can be changed: It can be impregnated with
Formaform-Thermolan, also included in the set, this creates a silicone-like mould that can be used several times. It is then heat and
water resistant, and can be used repeatedly (10-20 times). However, it loses the melting property due to the impregnation.
The mould made of Formaform is medium.hard and has good mechanical strength values, which is why mouldings of all ceramic
casting materials, polyester and epoxy resins, wax, casting soap, plaster and cement, etc. can be poured.
Technical Details:
Test Method
Unit/Properties
Condition as delivered coarse granular form
Colour
as delivered
ochre
Odourin molten conditionslightly sweet
Density at 20 °C g/cm3
DIN 53 217
0.74
Viscosity at 60 °C
MPa.s 35–45
Shore hardness after 8 days
DIN 53505/ISO 868 42
Melting point°C 48–56
Processing temperature°C 58–65
Solidification point°C 35
Alkaline valueph 6–7
Elongation at break %
DIN 53 504 N 200–220
Tear strength
ASTM D 624 B N/mm 18
Package content 1 Packet Formaform (Granules)
1 Bottle Formaform-Liquid 1 Bottle Formaform-Thermolan Material content komplet: Art. 60 181
800 g
325 g
125 g
1250 g
60 182
1600 g
650 g
250 g
2500 g
60 183
5120 g
2080 g
800 g
8000 g
60 184
16000 g
6500 g
2500 g
25000 g
The packet contents are delivered with detailed use and processing instructions.
Material requirements for 100 ml
100 g Formaform
+ 40 g Liquid
= 140 g
60 181
Formaform I
Packet content 1250 g
Packet
PE 6
60 182
Formaform II
Packet content 2500 g
Packet
PE 3
60 183
Formaform III
Packet content 8000 g
Bucket
PE 1
60 184
Formaform IV
Packet content
Hobbock
PE 1
Plastic bottle
PE 3
25 kg
Formaform Liquid
With each new melting process an additional quantity, = approx. 3%, of Formaform Liquid should
be added and carefully mixed into the hot, molten moulding compound. The moulding material
then becomes as liquid and flowable as before. Formaform Liquid also causes the mould to retain
its original elasticity. (For each new melting process, a part of the liquid contained in the Formaform is used up, which is compensated for by this mixing. This additive product is also available
separately).
60186
Formaform-Liquid
325 g
Mould-making techniques
5. The silicone mould system
Silicone oils are synthetic polymers derived from ground silicon. They can be distinguished based on their curing
temperature as cold (RTV = room temperature vulcanisation) and hot (HTV = high temperature vulcanisation)
polymers. HTV silicones are processed in a high temperature range. Thus, they provide a quick mass production
option, indispensable in industrial production. In contrast, the RTV silicones have proven to be suitable moulding
materials, particularly for arts and crafts moulding. It must be noted that there are two different systems:
Addition-curing silicones (Silcodupli) cure with complete volume stability. The moulds do not shrink or expand during curing. This
means that the final shape has exactly the same internal dimensions as the model. This advantage, however, has a negative effect on
demoulding, because the removal of the original from the mould, as well as the removal of the cast shape from the mould, can cause
problems.
Condensation-Curing silicones offer smoother processing and demoulding is easier. The reason is that the mould shrinks during
curing, which has a positive impact when removing the original from the mould and when removing the finished object from the mould
casting box. Therefore, condensation silicones are preferred for manual, artisanal mould making as opposed to the addition-curing
ones (Silicone NV, MVE, HE, HB and HV). The shrinkage of the mould is due to the natural expansion, especially in the curing reaction
phase, in which silicone mixture reaction products (alcohol gasses) are generated and then diffuse out. This creates the shrinkage,
which depends on the composition of the silicone mixture and can be 0.1 to 0.4%.
The Creartec silicone system offers yet another, equally important advantage: the different types of silicone can be individually mixed
with each other or applied by a simple on or over moulding on an existing silicone layer. This is due to the use of a compatible siliconebased material (oil) and a universal curing agent.
From the successful combination of the specialty silicones in a wide variety of mixtures, the obtained properties can be pre-determined
and set by the user. This is particularly evident in the table below. It shows how silicone moulds can be prepared with a precisely predetermined Shore hardness. But that is not all: The silicone mixtures can be modified by the incorporation of additional complimentary
products (modular system) so that they can cure slow, fast, hard, solid or elastic, and with low or high tear resistance. These features
can be obtained by combinations of the four different silicones in the existing system in conjunction with the modular system.
NV
%
100
80
70
60
50
40
20
20
20
40
60
50
80
40
HE
%
HV
%
HB
%
*MVE Silicon
%
Öl %
20
20
40
40
60
80
100
20
20
15
40
20
20
60
80
20
40
ShoreHardness
10
10
100
80
75
60
40
40
20
40
80
70
60
5
10
15
100
80
70
40
20
10
100
80
60
* finished silicone mixture consist of Silcolan NV and Silcoflex HE
30
23
21
16
12
14
11
8
34
26
22
20
22
15
26
20
17
9
16
48
26
18
18
14
18
16
14
Consistency
Vulkanisations
Properties
medium viscosity
medium hard
medium viscosity
soft-hard
free-flowing
medium soft
free-flowing
soft
low viscosity
very soft
low viscosity
very soft
low viscosity
extreme soft
low viscosity
extreme soft
high viscosity
hard
high viscosity
softhard
high viscosity
medium soft
spatula-viscous
medium soft
spatula-viscous
medium soft
free-flowing
very soft
medium viscosity
weich hart
free-flowing
soft hard
spatula-viscous
soft
medium viscosity
extreme soft
spatula-viscous
soft
medium viscosity
hard heat-resistant
medium viscosity soft-hard (heat-resistant)
free-flowing
soft (heat-resistant)
free-flowing
soft (heat-resistant)
low viscosity
very soft (heat-resistant)
free-flowing
soft
free-flowing
soft
low viscosity
very soft
Usage
All-round mould
All-round mould
Cast-resin moulds
Tooling resins mould
Candle moulds
Wax moulds
Skin mould (thickened)
Skin mould (thickened)
Stucco mould (thickened)
Stucco mould (thickened)
Coatmould
Coatmould
All-round mould
Wax mould
Stucco mould (thickened)
Skin mould (thickened)
Tooling resins mould
Skin mould (thickened)
PU-Mould
Pewter mould
Full-pewter mould
Full-pewter mould
Full-pewter mould
Full-pewter mould
Candle casting mould
Candle casting mould
Candle casting mould
15
16
Mould-making techniques
Silcolan-NV
This is a low viscosity RTV silicone rubber, pourable and spreadable. It is well suited for creating
single and multi-part moulds for negative reliefs, utensils, technical mouldings (matrices, casting
templates), figures, etc. Due to its ease of processing and positive shape properties, this silicone is
one of the most used mould making products in arts and crafts.
Silcolan-NV has good flowability, is self-venting, and is characterized by very precise moulding
qualities. It has an average elasticity, so it can be also used for the sheathing of shape models
which have been coated with a silicone soft skin as an additional support mould.
The moulds prepared from Silcolan-NV can be universally filled with almost any casting materials,
such as plaster, cement, ceramic casting materials, Formestone, Woodstone, moulding soap, wax,
crystal clear and technical polyester resins such as mould and liquid wood, except polyurethane
casting materials.
Silcolan-NV is mixed with 1.5–2.5% silicone curing agent, and cures at an ambient/material temperature of 20 ° C within 1–3 hours to a immediately ready to use, versatile mould.
It can be mixed with the different silicones in this system so that the newly formed silicone mixture
allows completely different usage properties. For example, mixing with Silcoform-HV produces a
hard, robust mould, which has a high intrinsic stability and can be used for sheathing or as a supporting form. Mixed with Silcoflex-HE,
it increases the elasticity of the mould so that it not only has excellent flexibility, but also has a high tear resistance. This form of material has been developed to be well suited for moulding of complicated prototypes with undercuts. This is particularly advantageous
in the field of technical modelling.
Added curing agent 1.5–2 %.
Technical Details:
Test Method
Unit/Properties
Colouringas deliveredwhite-grey
Density at 20 °C - g/cm3
DIN 53217
1.24
Mixing ratio %
Silicone + curing agent
100 : 1.5–2.5
Curing time
temperature dependent
2–4 hours
Pot life at 20 °C
temperature dependent
40–100 minutes
Shorehardness A after 14 days
DIN 53505 / ISO 868
30
Elongation at break %
DIN 53504 S1 / ISO 37
250
Tear strength N/mm2
DIN 53504 S1 / ISO 37
4.5
Tear resistence N/mm2
ASTM D 624 B
32
Viscosity dynamic at 23 °C
Brookfield - mPa.s
24.000
Thermal resistence °C
of the cured mould
180
Shrinkage %linear0.4
Silcolan-NV is delivered with the appropriate curing agent, a detailed with detailed use and
processing instructions.
Finished painted
Madonna portrait
Raw cast Artestone
(56 011)
Damaged and weathered model
Moulding with Silcoform HV.
Application of plaster bandages as
reinforcement
Model casting with Arte-Carving Wax
Blocks (80 067). Reworking with soldering
and carving.
Finished wax model and new casting
mould of Silcolan-NV.
60 400
Silcolan-NV
490 g and Silicone hardener 10 ml = 500 g
Tin
PE 6
60 401
Silcolan-NV
980 g and Silicone hardener 20 ml = 1000 g
Tin
PE 6
60 402
Silcolan-NV
Bucket
PE 1
60 404
Silcolan-NV 24500 g and Silicone hardener 500 ml = 25 kg
Hobbock
PE 1
4900 g and Silicone hardener 100 ml =
5 kg
Mould-making techniques
Silcoval-MVE
This medium viscosity RTV silicone rubber is castable and spreadable, so that moulds with a medium tear resistance and good elasticity can be produced. The silicone is a pleasant, ivory colour,
and is ideal for moulding complex, technical and handicraft models. It is also used for moulds with
undercuts, where one or two-piece moulds are required instead of a multi-part mould. Silcoval-MVE
is preferentially used for the production of candle moulds, as the soft touch material does not cause
unpeeling / demoulding problems when the finished wax parts are removed.
This special mixture of silicone is particularly suitable for the candle casting technique, where a
relief-like lining that contains the decorative candle pattern is poured first. After completion of the
mould plate, it is rolled up and attached to the bottom base, which takes the shape of the plug tip
in a normal tubular sleeve (cardboard tube). Subsequently, the tube is closed on both sides with a
cover. The wick is pulled through and knotted on the outside at the bottom mould, the tube lid is
tightened and the wick is brought to the other end of the second cover behind the plug, which has
a wick holding slot next to the filling opening. This construction results in a practical candle casting
mould, which is filled with wax and provides the opportunity to pour hundreds of candles.
The same technique, that is, the rolling up of a soft mould insert is increasingly used for the
preparation of figures. It is advantageous that even models with undercuts and openings in a onepiece shape can be moulded quickly and safely with this rolling technique.
Silcoval-MVE is the example of a successful combination of various silicones in the Creartec silicon system. (The silicone candle mould
described here is also available as a finished candle > Candles Techniques Art. No. 80 901-80 956).
Technical Details:
Test Method
Unit/Properties
Colouringas deliveredivory
Density at 20 °C g/cm3
DIN 53479 A
1.21
Mixing ratio %
Silicon : Vernetzer
100 : 1.5 – 2
Curing time
temperature dependent
2 - 5 hours
Pot life at20 °C
temperature dependent
60–100 minutes
Shore hardness A after 14 days
DIN 53505 / ISO 868
18
Elongation at break %
DIN 53504 S1 / ISO 37
380 400
Tear strength N/mm2
DIN 53504 S1 / ISO 37
9.5
Tear resistence N/mm2
ASTM D 624 B
19
Viscosity dynamic at 23 °C
Brookfield mPa.s
20.000
Temperature resistance °C
of the cured form
> 220
Shrinkage %linear0.2
Silcoval-MVE is delivered with a curing agent, a mixing bowl, and detailed usage instructions.
1-part candle casting form
1-part candle casting form
1-part round form
60 421
Silcoval-MVE
490 g and silicone hardener 10 ml = 500 g
Tin
PE 6
60 422
Silcoval-MVE
980 g and silicone hardener 20 ml = 1000 g
Tin
PE 6
60 423
Silcoval-MVE 4900 g and silicone hardener 100 ml =
Bucket
PE 1
60 424
Silcoval-MVE 24500 g and silicone hardener 500 ml = 25 kg
Hobbock
PE 1
5 kg
17
18
Mould-making techniques
Silcoflex-HE
This soft, uniquely elastic RTV silicone rubber has a high tear resistance. Therefore, it is especially
suitable as a high-quality silicone for moulding complex models or structures, including those with
significant undercuts. The making of multi-part forms in the context of rapid prototyping is also
possible. With this method, large sculptures, including those with undercuts, can be moulded.
Silcoflex-HE is extremely flexible due to its unique material composition. Durable skin moulds can
be made, for example, for the production of functional models that are used for acupuncture. A
sandwich technique, which is particularly good for reproducing more fragile surface structures
(sculptures), is used. The skin mould, which may be only a few millimetres thick, is usually made by
gently brushing the object with the Silcoflex-HE partly mixed with silicone thickener. The thickener
in the silicone causes a thixotropic reaction, which prevents this thin material from flowing away
from vertical surfaces. After curing, a thick trowel silicone composition is applied with a spatula to
the first silicone skin and spread evenly. Another potential layer would give the mould durability and
stability. Depending on the shape of the model, thickened Silcolan-NV is also suitable for providing
support and stabilisation. The same results can also be obtained with the troweable Silcoform-HV.
All these silicones combine well with the previously applied skin to obtain a cohesive mould.
Another important application area is possible by mixing this silicone with Silcotin-HB. This creates
a high-temperature resistant silicone mixture which is particularly suitable for producing more
complex pewter casting moulds. So far, it has not been possible to cast intricate pewter figures
with highly sculpted forms, because the heat-resistant silicones are too solid and inflexible, and
three or multi-part moulds would have to be built for such mould constellations. An effort that could
only be carried out by very few mould-making professionals.
The development of flexible, heat-resistant distinctive Silcoflex-HE means it is now possible to mix
it with heat-resistant Silcotin-HB and create an elastic mould for tin figures. This allows a comeback for the pewter casting technology that can now produce precise, fully three-dimensional
figures in any desired style. The mixed silicone allows short-term temperature exposure up to
380°C, which is ideal for casting with lead, tin and zamac.
Silcoflex-HE is already one of the professional silicones that are used when particularly valuable or
sensitive models must be reproduced.
Technical Details:
Test Method
Unit/Properties
Colouringas deliveredpale blue
Density at 20 °C g/cm3
DIN 53479 A
1.15
Mixing ratio %
Silicone + curing agent
100 : 2–2.5
Pot life at 20 °C
temperature dependent
60–120 Minutes
Curing time at20 °C
temperature dependent
4–8 Hours
Shore hardness A after 14 days
DIN 53505 / ISO 868
8
Elongation at break %
DIN 53504 S1 / ISO 37
650
Tear strength N/mm2
DIN 53504 S1 / ISO 37
4.0
Tear resistance N/mm2
ASTM D 624 B
24
Viscosity dynamic at23 °C
Brookfield mPa.s
16.000
Temperature resistance °C
of the curing mould
> 380
Shrinkage %linear0.2
Temperature resistance °C
cured mould
160 °C
Silcoflex-HE is supplied with the appropriate curing agent, a mixing bowl
and instructions for use.
60 411
Silcoflex-HE
490 g and silicone hardener 10 ml = 500 g
Tin
PE 6
60 412
Silcoflex-HE
980 g and silicone hardener 20 ml = 1000 g
Tin
PE 6
60 413
Silcoflex-HE 4900 g and silicone hardener 100 ml =
Bucket
PE 1
60 414
Silcoflex-HE 24500 g and silicone hardener 500 ml = 25 kg
Hobbock
PE 1
5 kg
Mould-making techniques
Silcotin-HB
RTV silicone rubber Silcotin-HB is easily recognisable as a heat-resistant silicone due to its distinctive
tile-red colouring. It is preferred for the preparation of long-life pewter casting moulds. The silicone
is thick, but nonetheless can be painted and cast, as it has excellent free flowability. Due to its high
temperature resistance, it can be mixed with high-quality fillers that ensure that the prepared moulds
are solid and stable. They are neither elastic nor stretchable. Therefore, even simple tin blanks can be
cast without undercuts.
As the moulds are preferentially used for casting with low melting point metal alloys, such as tin, lead
and pot metal, these moulds differ from other two-part silicone moulds not only by their colouring,
but also by the small, particularly narrow fill opening, which usually also joins a second, even smaller
opening in the mould surface. This is due to the special casting technique that uses liquid metal. This is
very free-flowing and does not cool down during the filling of the mould, so that it spreads evenly and
fills the mould completely. As it must displace the air contained in the mould at the same time, this is
done through the second opening, which is technically known as an “air hole”.
Because Silcotin-HB is also compatible with other Creartec silicones, it can also be mixed with the
highly elastic Silcoflex-HE. This creates a temperature-resistant elastic silicone composition where the
moulding of complex models, including those with large undercuts, can be made. This ability has revolutionised the pewter casting
technology that produces just as fantastic looking cast pewter components that was previously only possible with cold-curing casting
materials. This results in fully plastic toy figures, such as toy soldiers, Indians, historical portraits of persons, animals, etc. that have for
many decades traditionally been cast as “flat figures” of tin and then painted with loving care. In addition, chess figures, Christmas tree
ornaments, belt buckles , buttons, decorative fittings for bottles and jars, brooches, wheels, small cannons and frescoes for equipping
self-made cogs, candlesticks, cups, plates and jugs are now possible..
The two or multi-part forms, prepared from Silcotin-HB, are so durable and dimensionally stable, that well over 100-150 casts can
be made using it. Silcotin-HB is also suitable for the production of linocut plates. Silicon plates of uniform thickness of 5-6 mm are
cast and then worked (carved) after a reaction time of 24 - 36 hours with standard linoleum cutting tools. If the plate hardness is not
sufficient, fine quartz powder (52, 351.02) can be mixed with the silicone, prior to mixing with the hardening agent. This makes the
plates harder. The same technique is also used for carving matrices for jewellery casting. For this purpose, however, silicone sheets
with a thickness of 6-8 mm are used.
In addition jewellery moulds for the manufacture of pendants and brooches can be made of this silicone. For this purpose, they are
filled with Colouraplast (melting granules) and then put into a baking oven or toaster. At a temperature of 180-200°C, the small coloured Colouraplast granules melt and take the form of the desired jewellery items. If a pewter casting mould is coated with a thin layer of
the mould release agent (51 101), then moulds can be made of polyester and polyurethane resins (PGB-Polyurethane), polyester glass,
polyamber casting resin and polyester casting wood. These moulds are for wax casting without release agents. They are not suitable
for pouring plaster or ceramic casting materials as these materials are too thick.
Technical Details:
Test Method
Unit/Properties
Colour as deliveredterracotta coloured
Density at 20 °C g/cm3
DIN 53479 A
1.41
Mixing ratio %
Silicone + curing agent
100 : 1.5–2.5
Pot life at 20 °C
temperature dependent
30–60 minutes
Curing time
temperature dependent
0.5–3 hours
Shore hardness after 14 days
DIN 53505 / ISO 868
48
Elongation at break %
DIN 53504 S1 / ISO 37
110
Tear strength N/mm2
DIN 53504 S1 / ISO 37
4.5
Tear resistence N/mm2
ASTM D 624 B
30
Viscosity dynamic at23 °C
Brookfield mPa.s
25.000
Shrinkage %linear0.2
Silcotin-HB is supplied with the appropriate hardener, a mixing bowl, and instructions for use.
60 406
Silcotin-HB
490 g and Silicone hardener 10 ml = 500 g
Tin
PE 6
60 407
Silcotin-HB
980 g and Silicone hardener 20 ml = 1000 g
Tin
PE 6
60 408
Silcotin-HB
Bucket
PE 1
60 409
Silcotin-HB 24500 g and Silicone hardener 500 ml = 25 kg
Hobbock
PE 1
4900 g and Silicone hardener 100 ml =
5 kg
19
20
Mould-making techniques
Silcoform-HV
This highly viscous, non-flowable, but spreadable and trowelable RTV silicone rubber, because of its
viscous consistency is suitable especially good for moulding of ceiling decorations, wall reliefs and
borders. In addition, it is often used as a quick impression material for test form production. Due to its
solid consistency, it can be trowelled directly into the master mould, where it hardens within minutes
to a solid functional form. For this application technique no casting mould frame is needed.
Silcoform-HV is also used by scientists and researchers as a so-called „scraper silicone“ for the
moulding of rock formations in caves and other structures, such as are present in a sandstone or slate
wall fossils prints etc.
The professionalism of this material is shown during moulding of stucco works, wall reliefs, and for
partial impressions on large busts, figures or monuments where special forms arise, despite their size
and scope, and having a mould wall thickness of about 10 - 15 mm. Atthe next hollow casting, the
forms thus produced show thatthey have a very greatstability and strength, thatwithstands without
any deformations the weight of heavy casting materials used in the reproduction of these models.
For ceiling impressions Silcoform-HV is painted only thinly on the model surface. After curing, the second following compound layer is previously applied thixotropic silicone thickener. This prevents dripping of the material, which can happen because of the self-gravity of the silicone. Additionally, it is possible to minimize the impression
time. To this end, a silicone hardening accelerator, which is particularly recommended when working outside or in winter temperatures
is added to the silicone mixture. The curing requires a considerably shorter period of time, and prevents silicone drips during this stage
of the model. For the casting of large areas of 60 x 60 cm, etc., after the application of the second silicone layer, a fiberglass laminate
fabric (52 396) is inserted. This is easily pressed into the silicone composition to support more silicone layers. This embedded fabric
makes the resulting laminate-like structure of greater stability and strength.
Silcoform-HV is suitable for mixing with other silicones of this system, which is useful if you want to use a smoother, more elastic
silicone instead of a rigid one.
Technical Details:
Test Method
Unit/Properties
Colour as deliveredpale grey
Density at20 °C g/cm3
DIN 53479 A
1.28
Mixing ratio %
Silicone + curing agent
100 : 2 – 2.5
Pot life at 20 °C
temperature dependent
30–60 minutes
Curing time
temperature dependent
10 – 30 minutes
Shore hardness A after 14 days
DIN 53505 / ISO 868
34
Elongation at break %
DIN 53504 S1 / ISO 37
350
Tear strength N/mm2
DIN 53504 S1 / ISO 37
4.5
Resistance strength N/mm2
ASTM D 624 B
29
Viscosity dynamic at23 °C
Brookfield mPa.s
90.000
Temperature resistance °C
of the cured mould
115
Shrinkage %linear0.3
Silcoform-HV is supplied with the appropriate hardening agent, a mixing bowl and
instructions for use.
60 416
Silcoform-HV 490 g and Silicone hardener
10 ml
60 417
Silcoform-HV 980 g and Silicone hardener
20 ml
60 418
Silcoform-HV 4900 g and Silicone hardener
100 ml
Tin
500 g
Tin
1000 g
PE 6
5 kg
PE 1
Bucket
PE 6
Mould-making techniques
Silicone hardener
Mixing of silicone moulding materials (except for Silcotrans-NVT and Silcodupli VHE) is always carried out
with the same hardener. It is therefore possible to mix all the base silicones together. The hardener amount
used with these silicones is generally 1.5 - 2.5%. A reduced hardener amount of 1.5% may be best in the
hot season, because the silicone reacts faster in the warmer ambient temperature. Alternatively, in winter
it may be so cold that a hardener addition of 2.5% is needed in order to initiate the curing reaction, which
is not immediately activated due to the cold material. Thus, in order to avoid using an incorrect hardener
volume, the silicone temperature should be measured prior to mixing. The ideal temperature is 18 - 20°C,
and requires a hardener amount of 2%.
Dosing the hardener is also possible by dripping it from the container. To this end, the bottle is equipped with
a KiSi* dropper. 40 drops yield 1 g of silicone hardener.
60 440
Silicon hardener
10 ml
Glass bottle
PE 6
60 441
Silicon hardener
20 ml
Glass bottle
PE 6
60 442
Silicon hardener
100 ml
Glass bottle
PE 3
*KiSi = child-safe closure
„Sicron“ quartz powder
If a silicone mixture needs to be stronger and harder, this can be achieved by adding quartz powder.
Sometimes, when a larger quantity is required, the silicone mix may become too thick. To avoid this, the
mixture can be thinned by adding a certain amount of silicone oil. Through targeted dosing of these
two materials, the desired silicone mixture can be prepared. Using the same procedure, a silicone
can be produced with a specific Shore hardness.
Not every quartz powder is suitable, because the finished preparation (silicone mould) is exposed to
different thermal stresses and comes into contact with different resins. The quartz powder „Sicron“
has so far proven to be the best for this application.
Technical Details:Test MethodUnit/Properties
Standard colour value white
86
Density at 20 °C g/cm3
ISO 787.10
2.65
Bulk density g/cm3ISO 600.54
Moles hardnesshard7
Alkaline value
pH ISO 10390
7
52 351.02 „Sicron“ Quartz powder (white)
900 g
Plastic bucket
PE 6
52 352.02 „Sicron“ Quartz powder (white)
2500 g
Plastic bucket
PE 3
How was silicone discovered or invented…
Silicone actually owes its invention or discovery to chance. The English chemist Frederic Stanley Kipping experimented in the years
1895-1906 with organic silicon compounds. The clumped ketones which he referred to as silicones emerged. He found no use for
them because of their stickiness. That changed abruptly a few years later.
In 1940, the two chemists Eugene G. Rochow and Richard Müller worked simultaneously, but totally independently, on the production
of chloromethylsilane. What neither of them knew was that the precursor of the synthetic polymer „silicone“ had been discovered.
If chloromethane comes into contact with powdered silicon (Si = chemical element = metalloid - origin = gravel or flint) at a temperature of 350 ° C in the presence of a copper catalyst, dichlorodimethylsilane is produced. This process is now called the Müller-Rochow
synthesis.
If silane is mixed with water, a highly exothermic reaction results. Adding hydrochloric acid to the silane mixture produces the familiar
silicone polymer. The fast and versatile proliferation of the silicone is due to the fact that this substance has unique properties that are
highly useful:
•
•
•
water-repellent
temperature-resistant
elastic
21
22
Mould-making techniques
6. Special silicones
The CREARTEC silicone program is complimented by some special mouldmaking materials. This refers to silicones being used for special mouldmaking techniques or special applications, for example as a decorative,
insulating or dielectric protective substrate.
Silcotrans-NVT (Transparent casting silicone)
This low-viscosity, transparent, clear, pourable and spreadable RTV-silicone is characterised by high tearing resistance, coupled with exceptionally high elasticity. It is mixed and
processed from components A + B in 1 : 1 ratio, resulting in transparent mould blocks.
In addition to the usual production of attractive decorative blocks, Silcotrans-NVT is
also suitable for embedding selected objects in moulds. This produces rubbery „paperweights“, which are ideal at trade fairs and exhibitions because of their elasticity
as a representative decoration pattern. The second important application is for potting sensitive electronic components or specific component groups that contain, for
example, temperature-sensitive IC‘s or high-quality circuits that need to be installed
in shock and vibration-sensitive equipment, such as elevators, excavators, vibrating
machines, etc.
Especially interesting is that the object embedded in the silicone is clearly visible even
after
the mould material has cured. This makes it possible to cut the mould side so that the model can be
removed undamaged from it. The mould is then filled with a casting material and thus is a convenient
way to rapidly make replicas. This method is preferentially used for producing small series parts. The
embedding of the model and the simple cutting of the form means that the manufacturing technique
of moulding is greatly simplified. This gives the layman the opportunity to quickly make moulds and
pour a second piece without extensive prior knowledge.
Silcotrans-NVT has a good separation capability compared to most casting materials, so it can be
filled with ceramic casting materials, synthetic resins, casting and dental wax, casting soap, etc.
Colouring: The liquid silicone mixture can be mixed with a small amount of silicone colour paste (60
712) and then it turns a transparent colour. If the proportion of the colour paste is increased, transparency decreases and the moulded skin becomes opaque. In addition, white and black colour silicone
paste is available for making the widely produced „black boxes“.
Technical Details:
Test Method
Unit/Properties
Colouringas deliveredtransparent
Density at20 °C g/cm3
DIN 53479 A
1.1
Mixing ratio % anteilig
A : B
1:1
Pot life at 20 °C
temperature dependent
30–90 minutes
Curing time
temperature dependent
3 – 8 hours
Shore hardness A after 14 days
DIN 53505 / ISO 868
30
Elongation at break %
DIN 53504 S1 / ISO 37
200
Tear strength N/mm2
DIN 53504 S1 / ISO 37
4.0
Tear strength N/mm2
ASTM D 624 B
10
Viscosity dynamic at23 °C
Brookfield mPa.s
35.000
Shrinkage %linear0.4
Dielectric strength kV/mm
IEC 60243
20
Dielectric constant
IEC 60250
< 3.0
Silcotrans-NVT is supplied as a 2-component casting silicone with detailed processing and use instructions.
60 425
Silcotrans-NVT
105 g Base silicone and
105 g Hardening medium = 210 g Packet
PE 3
60 426
Silcotrans-NVT
385 g Base silicone and
385 g Hardening medium = 770 g Packet
PE 3
60 427
Silcotrans-NVT
760 g Base silicone and
760 g Hardening medium = 1520 g Packet
PE 3
60 428
Silcotrans-NVT 2500 g Base silicone and 2500 g Hardening medium = 5000 g Packet
PE 1
60 429
Silcotrans-NVT 10.000 g Base silicone and 10.000 g Hardening medium = 20 kg Packet
PE 1
Mould-making techniques
Silcodupli VHE (Addition-curing silicone)
When making reproduction models, for example, for prototypes, an addition-curing silicone
is used. This hardens without any shrinkage, offering the ability to manufacture a dimensionally-accurate reproduction of the original model. This silicone is particularly well suited for
such precision applications. Care was taken in the development of the material to produce
a highly elastic product with a high tear resistance. It is therefore particularly suitable for
moulding complex models, including those with extremely deep and/or pronounced fine
structures.
In general, this RTV rubber is a unique rubber compound that is particularly well suited for
the production of elastic printing pads, stamps, printing rollers. It has a low Shore hardness
and is also designed for a high mechanical resistance so that the low hardness permits easy
demoulding of complex compact shapes or models.
Silcodupli-VHE is preferentially used for the production of various stamps, rubber rollers
and moulds. It is possible to copy a font or stamp image directly from an engraved plastic or metal negative plate. Due to its specifically high flowability, it flows very accurately
into these often very finely worked engraving areas, and is also characterised by excellent
reproduction of detail. Therefore, it can also produce robust stamping plates, paint rollers,
rubber rolls and many other rubber products such as rubber bumpers, shock absorbers,
rubber washers, etc.
Silcodupli-VHE is supplied as a 2-component casting silicone with detailed processing and
use instructions.
Technical Details:
Test Method
Unit/Properties
Colouringas deliveredorange
Density at 20 °C – g/cm3
DIN 53479 A
1.10
Mixing ratio % anteilig
A : B
1:1
Pot life at 20 °C
temperature dependent
60–100 minutes
Curing time at20 °C
temperature dependent
6–8 hours
Shore hardness A after 14 days
DIN 53505 / ISO 868
12
Elongation at break %
DIN 53504 S1 / ISO 37
800
Tear strength N/mm2
DIN 53504 S1 / ISO 37
4.5
Resistance strength N/mm2
ASTM D 624 B / ISO 37
20
Viscosity dynamic at23 °C
Brookfiield mPa.s
5.000
Shrinkage %linear0.1
Temperature resistance °C
of the cured mould
> 160 °C
Silcodupli-VHE is supplied with the corresponding hardener*, detailed processing instructions, and a mixing bowl.
*With regards to addition-curing silicone, the curing agent is not called the crosslinker, but the hardener.
60 431
Silcodupli VHE
250 g and Silcodupli hardener 250 g = 500 g
Tin
PE 3
60 432
Silcodupli VHE
750 g and Silcodupli hardener 750 g = 1500 g
Tin
PE 3
60 433
Silcodupli VHE
2500 g and Silcodupli hardener 2500 g = 5000 g
Bucket
PE 1
23
24
Mould-making techniques
7. Chemical supplements (modular system)
When mixing silicone, it is important that it can be precisely tailored to a specific application. However, this
requires some additional products, so that this project can be accomplished quickly and safely.
On one hand, this is possible with the four base silicones used in Creartec mould-making technology (NV, HE,
HB, and HV). On the other hand, special components are available that have been developed in the form of a
modular system. It is important that these different chemicals are compatible with each other, and not only with
the basic silicones, so can that there are no unwanted adverse reactions.
When using these system products, it must be taken into account that they must always be incorporated
before mixing the hardener into the silicone mixture. The hardener is always stirred into the prepared
silicone composition at the end.
Silcoform silicone deaerator
In order that fine structures of a model can be perfectly moulded, and that no air bubbles remain
within the silicone composition, it must be mixed with a silicone deaerator. The deaerator in the
liquid silicone makes air bubbles join up and rise rapidly to the material surface and burst, due
to the increased buoyancy force. The result is a bubble-free silicone composition into which the
hardening agent is blended in afterwards. At that point the silicone mixture is ready and can be
processed immediately.
Deaerator addition 1–3 %.
60 461
Silcoform silicone deaerator
20 ml
Plastic bottle
PE 6
60 462
Silcoform silicone deaerator
100 ml
Plastic bottle
PE 6
Silicone oil fluid (thinner)
The consistency of the silicone is not always suitable for processing when there are special moulding requirements. In this case, silicone oil fluid is added in precise amounts measured using a
scale. The silicone mixture is then mixed by thoroughly stirring and checking whether the amount
of thinner is sufficient. If not, the process must be repeated.
The addition of silicone oil fluid decreases the Shore A hardness and the produced mould is then
slightly softer and more resilient. The hardening agent is only stirred into the silicone mixture after
the oil has been thoroughly blended.
Amount added 1–10 %.
60 606
Silicone oil fluid (thinner)
100 ml
Glass bottle
PE 6
60 607
Silicone oil fluid (thinner)
250 ml
Tin can
PE 3
Silicone thickener
Most silicones initially show good flowability. This is a disadvantage when moulding vertically standing decors or decors attached to a ceiling, because the silicone composition will run or drip after
application. To avoid this, silicone thickener is first stirred into the silicone mixture (mixed) and then
the hardener is added to the silicone.
Amount added 0,3–3 %.
60 640
Silicothix-thickener
10 ml
Glass bottle
PE 6
60 641
Silicothix-thickener
20 ml
Glass bottle
PE 6
60 642
Silicothix-thickener
50 ml
Glass bottle
PE 3
Mould-making techniques
Silicone Curing Accelerator
By Mixing silicone with this accelerator reduces the curing time. The acceleration of a silicone
curing agent may be done for many special reasons: for example, to complete an impression in
a cold environment (outdoors) or a complicated ceiling or wall casting mould more quickly. The
curing accelerator is therefore preferentially used during moulding of decorations and ornaments,
impressions of fossils in caves, etc. Due to successive applications of a thin silicone layer on the
mould object, it is possible that some layers may run or sag due to slower curing. To avoid this,
the silicone is hardened with this curing accelerator. Added amount: 0.5–3%. The hardening
agent is mixed in afterwards.
60 656
Silicone curing accelerator
30 ml
Plastic bottle
PE 6
Plastic bottle
PE 3
Silicone Colour Paste (Tinting Colour)
Often it is desirable that the silicone have a specific colour tone for a form to be prepared. For this
purpose, a silicone tinting has been developed, which is suitable for dyeing all silicone mixtures,
whether by condensation or addition-hardening RTV and HTV. All tinting colours are of very intense
color, which is why only a small amount of colour is needed for colouring. In this case, the amount
to be added depends on the intensity of the existing colour of the silicone. Light coloured silicone blends change colour best. The colours can be mixed together. Silicone colour paste is also
suitable for coloring 1-component silicones that are used to fill joints or as a construction silicone
sealant, adhesive etc.
colours:
08
red
60 712
22
blue
35
green
Silicone Colour Paste
45
yellow
63
orange
68
white
78
black
50 ml
Colour pigments
Liquid silicones can be coloured by mixing these colour pigments. Silicone oil fluid (60 606) is
placed in a mixing bowl and a small amount of the selected pigment powder is slowly added and
carefully stirred in. This creates a thick colour paste that can be directly added (mixed) to the silicone
composition. Important: the colour powder should not be mixed directly into the silicone, since it
can form lumps. The amount of the colour paste used is dependent on the desired colour intensity
of the silicone. The hardening agent is added to the coloured silicone composition at the end.
02
skin tone
07
brick red
08
medium red
09
rubin red
11
raspberry red
20
ultramarine blue
31
fir green
35
leaf green
36
dark green
42
olive
43
moss green
45
yellow
50
ocher
51
light brown
52
earth braun
54
hazel
55
rust brown
57
oxide red
72
cement grey
78
black
60
terracotta
71 511
68
white
Colour pigments (powder)
100 ml
21
light blue
47
sunny yellow
58
dark brown
Shaker
PE 6
25
26
Mould-making techniques
Silicone remover
To ensure that dirty tools and brushes used for mixing and processing silicon do not become
unusable, they must be immediately cleaned after use with the solvent-based silicone remover.
Uncured silicone residues can be removed at the same time.
Important: Tools and mixing cups made of plastic or metal should not be cleaned, because the
silicone can be easily peeled off and removed after curing.
60 601
Silicon-remover
100 ml
Glass bottle
PE 6
60 602
Silicon-remover
250 ml
Metal can
PE 3
Mould Modelling Material
Mould models are fixed (attached) in the mould casting boxes with this slightly sticky modelling material. At the same time, unevenness between the model plate and the mould
casting boxes is compensated for. Mould modelling material is also used for sealing any
gaps (cracks) that may arise between the walls and the floor plate when using the mould
casting boxes. When making a 2-part mould, the material for modelling the master model
used for making the first half is embedded up to the separator.
The modelling material is reusable. At the beginning, it is usually hard and solid, depending
on the temperature. This changes immediately when a small piece is heated by hand for a
few minutes. It automatically becomes softer and more supple when shaping and modeling because of hand heat, so that filigree modelling work can be implemented. After being used in, e.g. embedding a model for mould
making, the material slowly cools and becomes hard again. This is advantageous because, for example, a model surface can then be
labelled or engraved. The modelling material is free of pollutants and produced from technical plasticine with wax, fillers and other
derivatives. It is therefore also suitable for all common modelling work and is reusable.
60 632
Mould modelling material
250 g
60 633
Mould modelling material
1000 g
Plastic pot
PE 6
Aluminium pot
PE 6
Changing the Shore hardness of a silicone:
By mixing silicone oil fluid, the silicone becomes more soft and elastic, thus reducing its Shore
hardness. If a silicone needs to be stronger and harder, it should be mixed with Sikron quartz
powder. This increases the Shore hardness. If the silicone mixture thickens too much when the quartz
powder is added, silicone oil fluid can be mixed in until it returns to a normal, flowing state.
It is important that the additional materials mixed into the silicone are accurately weighed and the change of the mixture recipe noted.
This will provide you with important information, which can also be used for similar blends.
Mould-making techniques
Adhesion medium
When filling latex and big silicone forms with hollow casting material, e.g. kersolith, a problem may arise where the thick casting material does not adhere to the steep sides of
the form and falls out. The same can happen when a form is coated with Woodstone
Metallic (ceramic casting compound with metallic effect). The thick liquid casting
material may not adhere in the desired layer thickness to the mould wall.
The mould is first coated with adhesion medium so that it is possible to form such
surfaces. After drying, a barely visible lining material is produced. All aqueous and
solvent-based casting materials and putties can be applied in a layer thickness of
up to 1 mm and will stick. After drying, the coating thickness can be increased and
stabilised by pour-casting, spreading or troweling with the same material.
The transparent adhesion medium bonds with the casting material and is incorporated without adverse effects. The thin-walled mouldings can then, as usual, be treated with all
colours and glazes, etc. This application is therefore particularly well suited for the production of
hollow moulds.
Another application is the moulding of vertical surfaces, e.g. large reliefs, rock art, etc. The background is pre-treated with adhesion medium. The casting material then adheres better.
60 671
Adhesion medium (colourless) 100 ml
Plastic bottle
PE 6
60 672
Adhesion medium (colourless) 250 ml
Plastic bottle
PE 3
Plastic box
PE 3
SB-Set
PE 3
Flow talcum (Form powder)
All rubber-like moulds must be rubbed or brushed with this talcum powder after use and then
packaged in an air-tight sealable polybag. This preserves the useful life of these valuable moulds.
Flow talcum, also referred to as steatite powder, prevents the moulds from drying out. At the
same time, it ensures that they remain elastic and supple, stopping them from becoming brittle
and friable.
The mould powder is mixed with Lycopodium (Lycopodium clavatum). It is therefore an excellent
powder for improving flow during the casting of tin figures. The rubber-based braking
effect of the silicone, which causes a slow filling of the mould, can be seen
when pouring the liquid tin into the silicone mould. Poor flow behaviour is
a cause of faulty tin castings. Coating the inner surface of the mould with
this mould powder results in a faster and smoother flow of tin.
60 627
627 Flow talcum (mould powder)
5g
Mould brush
A large, soft bristle brush, made with a durable synthetic hair bristles, is used
to spread talcum powder or a release agent in the mould. The hairs of the
brush are so fine and elastic that very delicate details cannot be deformed
or damaged when spreading the talcum powder over the mould walls. It is
also used for brushing out the mould which is already filled with a casting
material in order to eliminate any remaining air bubbles.
Important: the brush must be cleaned immediately after use to prevent the
ceramic casting compound from hardening and rendering this essential tool
unusable.
Brush Size # 22.
49 324
Mould brush (1 piece)
27
28
Mould-making techniques
Important additional products for mould production
Vario-Mould Casting Box DGBM
If casting with a liquid, pourable silicone mixture, a casting frame adapted for the size of the master model is required. Previously a
wooden box used to be assembled with screws. That was a complicated process! The box had to be disassembled after the first mould
half was completed and the mould removed. It then had to be screwed back together for the second mould half and disassembled
again afterwards.
This required technical skills and was time-consuming. The process is easier and faster with this mould casting box. After loosening
the wing nuts of the casting box, the side walls can be moved as required to form an elongated or square box for casting the model.
Once the screws are tightened, the casting box is ready. The box frame is firmly pressed onto the base plate of the bottom board with
a sturdy rubber band. The container is then evenly painted with the supplied lacquer and after drying the inner surface is coated with
release wax. This pre-treatment is then only required after every third mould.
The casting box is delivered with the required accessories for mould making.
1 mould casting box, adjustable - max. format 310 x 200 x 70 mm
1 shape rubber band
1 bottle of wood preservative sealing lacquer colourless 50 ml
1 bottle mould release wax 60 ml
1 synthetic hair brush No. 4
1 mixing / measuring cup with 500 ml scale
1 aluminum plastic spatula 300 mm long
1 Packet of form modeling material 250 g
1 detailed instructions
60 590
Vario mould casting box with complete accessories
Complete packet
PE 1
60 591
Vario mould casting box without accessories
Complete packet
PE 1
Mould casting box (stackable) DGBM
This mould casting box has proven itself extremely useful in the construction of single-or multi-part forms. Handling is somewhat
different to the Vario mould casting box. The box consists of a pegboard, with a grid of holes and a set of drilled wooden strips with
dowels. The dowels hold the strips in place so that one or more walls can be fitted. It is important to offset the strips when positioning
them (windmill vane principle).
This makes it possible to build any box format, either square or rectangular. This plug in strip method has many practical advantages,
especially when contour models are required. The strips are initially only built up to the separating line of the master model. This makes
it possible to completely embed the model. After completing this action, the box frame height can be increased by adding more frame
strips as necessary, to ensure that the model is completely covered with silicone to at least 6 mm above the highest point.
The mould casting box comes complete with the required accessories:
1 mould casting box with bottom panel,
24 wooden strips and 8 wooden dowels,
suitable for a box size of 375 x 295 x 70 mm
1 shape rubber band
1 bottle of wood preservative sealing lacquer
colourless 100 ml
1 bottle mould wax release 60 ml
1 synthetic hair brush No. 4
1 mixing / measuring cup with 500 ml scale
1 aluminum plastic spatula 300 mm long
1 package of form modelling material 250 g
1 detailed instructions
60 595
Mould casting box (plug-in) with complete accessories
Complete packet
PE 1
60 596
Mould casting box (pluggable) without accessories
Complete packet
PE 1
Mould-making techniques
Measuring cup (small)
Stable measuring cups are used for the measuring and mixing of silicones with the hardener. The
cups are made of solvent-resistant plastic.
49 103
Measuring cup (small)
( 6 Piece)
30 ml
SB-Set
PE 6
49 104
Measuring cup (small)
(50 Piece)
30 ml
SB-Set
PE 1
SB-Set
PE 6
Mixing cup 200 ml
The handy elastic measuring cup has a clear printed measuring scale on the outside. Measuring
cup with scale - solvent resistant.
49 106
Mixing Cup with Scale
(2 Piece)
200 ml
Stirring and measuring Container
These measuring containers have a raised, embossed measurement scale on the side. They are
temperature-resistant up to 110 °C, robust and almost unbreakable. On one side they have a
practical spout, opposite which a handle is attached.
Measuring container with scale - solvent resistant.
49 115
Stirring and measuring container (with handle) (1 Piece)
500 ml
SB-Set
PE 3
49 116
Stirring and measuring container (with handle) (1 Piece)
1000 ml
SB-Set
PE 3
Laboratory measuring cup
These practical measuring cups are indispensable for measuring small quantities of material.
Because of their usefulness, they can be used for numerous applications.
49 110
Measuring/mixing container with scale
50 ml
SB-Set
PE 3
49 111
Measuring/mixing container with scale 100 ml
SB-Set
PE 3
SB-Set
PE 6
Stirring spatula (aluminium)
Stable, reusable stirring spatula, suitable for mixing heavy, sometimes thick liquid
silicone mixtures.
49 011
Stirring spatula (aluminium) 300 x 20 x 2 mm (1 Piece)
Stirring sticks and rods
Stirring sticks made of wood are available for mixing silicone with hardener and other
auxiliary products. All stirring sticks are flat and smooth, and therefore easy to
clean.
49 005
Stirring sticks
(20 Piece)
150 x 20 mm
SB-Set
PE 6
49 006
Stirring sticks
(30 Piece)
113 x 10 mm
SB-Set
PE 6
49 008
Stirring sticks
( 6 Piece)
250 x 18 mm
SB-Set
PE 6
SB-Set
PE 6
SB-Set
PE 6
Stirring sticks - Set
The pack contains narrow and thin stirring sticks in two different lengths. They are particularly
suitable for mixing colours..
Pack contents: 30 stirring sticks 114 mm long - 8 mm wide
30 mm long stirring sticks 140 - 8 mm wide
49 004
Stirring sticks 114 und 140 mm x 8 mm (2 x 60 Piece)
Mould rubber bands
These stable 10 mm extra wide rubber bands are particularly well suited for holding 2 or
multi-part moulds tightly together during filling with the casting material.
The set includes: 2 mould rubber bands 100, 120 and 150 mm Ø.
42 653
Mould rubber bands - set
(6 Piece)
29
30
Mould-making techniques
Release agent
The release agent has a particularly important role in mould making. The model to be moulded must be painted
with a uniformly thin coat of release agent. After the successful preparation of a form, it must be re-treated with
a release agent, so that the mould surface is protected from the aggressive ingredients of the casting composition used for pouring. This also ensures that the cured cast can be removed from the mould without damage.
Pre-treatment of the mould model
The object selected for moulding must not be modified in its appearance by contact with the mould building material. Therefore, it must
first be protected, i.e. pre-treated, so that the applied release agent can be easily removed from it. It is therefore necessary that models
with absorbent surfaces be impregnated in advance. Since moulding originals are made of different materials, various varnishes and
primers are available for the pre-treatment (impregnation).
•
•
•
•
Raw wooden parts are coated with an aqueous matte varnish. The paint dries to an invisible coating.
Plaster, cement, concrete, stone and baked clay models are coated with a primer (casting materials primer). This seals the surface
so that the subsequently applied release agent is not absorbed, but remains on it (dries).
Parts made of metal, glass and fired ceramic are coated with an invisible Teflon coating.
Painted objects are also sprayed (protected) with this mould release spray.
The partially ready models that have been pre-treated with a transparent matte lacquer or a primer, are then subsequently treated
with a release agent. This is important because the appearance of a mould object after the mould is successfully completed must be
identical to its previous appearance - it should not be discoloured or damaged.
The wax solvent (60 611) contained in the mould release agent could possibly damage or dissolve the paint of painted mould objects.
Therefore, such objects should be treated first with an aqueous release agent (mould release agent 51 101). This separating means
should also be used when a mould is to be filled with a resin (epoxy resin or polyester resin).
In many cases, there is the question of compatibility: model - impregnation - release agents - impression. It must therefore be tested
which release agent is best suited for this casting situation. That is why, in addition to the solvent-based mould release wax, solventfree (aqueous) mould release agents are also available.
Unfortunately, not all separation problems are resolved in this manner as there are casting objects that cannot be treated with any of
these release agents. For example, the surface painting could be dissolved and destroyed, a precious metal could oxidise or an undercoating used in the model surface adhesive could be dissolved. To avoid such damage, a high-quality mould release spray should be
used for this object. The very thin layer of sprayed-on mould release agent protects the model, so that it looks the same as before after
removing it from the newly manufactured mould. The Teflon is not a problem because it is invisible, and it also protects the original
model against any mechanical damage. It takes over the function of an effective finish protection against moisture and weathering.
Separating agent pre-treatment for moulds
Due to the above reasons, a mould must also be protected with release agents from any aggressive ingredients before being filled
with a casting material. This ensures the long-term preservation of the mould and, at the same time, easy, safe demoulding of the
cast replica.
Aqueous casting materialsSeperating agents
Gypsum and ceramic casting materials, cement, concrete, soap
Mould release wax
Solvent-based resins:
Polyester, cold glaze, epoxy and polyurethane resins etc. Mould release agents
Wax-based casting materials
Beeswax, paraffin, composition wax, stearin, casting and polish wax, wax compositions
These materials are self-releasing.
No release agent required.
After curing/cooling of the reproduction model, it is carefully released out of the mould and removed. Possible release agent residue is
removed by scrubbing with soap and water. Blanks made of synthetic resin poured into a mould prepared with a release agent should
be cleaned of any release agent residues with tap water, and then dried carefully.
Mould-making techniques
Silicone mould separating cream
When producing multi-part silicone moulds, it must be ensured that, when pouring liquid silicone
into the first finished half mould, the silicone does not bind to the newly produced half mould.
Therefore, the top of the mould must be thinly coated with silicone mould release cream to prevent
it sticking to the newly produced mould.
This release cream can also be used to protect plaster components, which is why they should also
be coated with this cream. If the plaster surface has a finely textured surface, the release cream
should be applied on it as a thin liquid. The micro-fine cream layer serves as a protective barrier. (To
liquify the release cream, remove the bottle lid and place the bottle for a few minutes in a container
filled with hot water). This release agent is made of a high-quality petroleum jelly that can easily be
later removed from plaster and silicone parts with soapy water or silicone remover.
60 621
Silicone mould release cream
50 ml
60 622
Silicone mould release cream 250 ml
Glass bottle
PE 6
Metal box
PE 6
Glass bottle
PE 6
Metal tin
PE 6
Mould release wax
This liquid cream mould release wax (solvent-based) is thinly applied with a soft brush onto a
suitable master model. After a short drying period (5 minutes), the object must be carefully polished with a soft brush to evenly distribute the release wax. The newly created, micro-fine wax film
protects the model from the silicone, and ensures easy removal after completion of the mould. If
plastic moulds are to be filled with an aqueous casting material (plaster, concrete, cement, ceramic
casting materials, formstone, woodstone, soap, etc.), they also need to be pre-treated with this
release agent. The completed cast parts can then easily be removed from the moulds.
Mould release wax acts in the moulds not only as a release agent, but also as a form of protection,
because it is resistant to water-based casting materials and any aggressive ingredients. It consists
of a solvent-based wax composition which is no longer visible after spreading, because it has been
dispersed in a micro-thin layer on the mould surface. Mould release agents are easy to remove
both from the moulds and the master model with hot soapy water or silicone remover.
60 611
Mould release wax
60 ml
60 612
Mould release wax
250 ml
Mould release wax
This water-soluble release agent is resistant to all synthetic resins, also those containing solvents
such as polyester, epoxy, vinyl and polyurethane resins (polyurethanes), etc. It is used as a mouldrelease and protection for the pretreatment of shapes made of latex, silicone and plastic. It is thinly
distributed in the mould and drys within 15 - 20 minutes to a solid, thin release film. It is resistant
to the solvents contained in the resins, but can be easily washed off (removed) with tap water after
completion of the reproduction model.
51 101
Form Separating Agent
100 ml
Plastic bottle
PE 6
51 102
Form Separating Agent
250 ml
Plastic bottle
PE 3
Glass bottle
PE 6
Emulsion wax release agent
In order to mould open-pored objects of wood, plaster, ceramics (clay), they must be carefully
coated with emulsion wax release agent and, after drying, they must be polished with a soft brush,
so that the release agent is barely visible.
The release agent base of this product consists of a high quality polar wax, which is resistant to
all aqueous and solvent-based casting materials, and can therefore be used as a universal mould
release wax.
60 636
Emulsion wax release agent
60 ml
31
32
Mould-making techniques
Form-separating-Spray (with Teflon)
In order to mould expensive painted originals or those decorated with valuable precious metals,
safely and without damage, they must be carefully sprayed with mould release spray. The release
agent is not visible, therefore it can remain after moulding. The model receives high-quality touch
and wears protection that is resistant to environmental influences, skin perspiration, moisture and
dust effects. The Teflon (polytetrafluoroethylene) contained in the spray ensures this protection.
The release agent is only suitable for parts made of non-absorbent materials such as glass, metal,
ceramics, porcelain and plastic.It also can be used for painted or varnished decorative objects and
articles of daily use. Intricately shaped latex and silicone moulds which can not be painted with
a brush can be sprayed. Mould release spray provides an excellent long-term protective barrier.
60 616
Mould release spray (with Teflon)
300 ml
Spray can
PE 12
Bottle mit pump spray
PE 6
Silicon release varnish spray
This high-quality release varnish spray, based on pollutant-free silicone, is suitable as a universal release protection for all non-absorbing objects, including those with a paint or varnish
coating that is not dissolved by the silicone oil-based spray coating. Moulds can be pre-treated
before being filled with aqueous or solvent-based casting materials. The release agent is dry
within 20–30 minutes, thus allowing rapid further treatment of the casting models, as well as
the moulds.
60 661
Silicon release varnish spray
100 ml
Mould release soap (transparent)
The moulding of art objects made of stone begins with proper release agent property selection to
ensure that no trace of the agent remains after completion of the moulding process. Therefore,
objects made of granite, basalt, expanded concrete, porous concrete, cement, pumice, gypsum,
etc. must be coated before moulding with liquid release soap. The soap is heated for this purpose
in a container in a hot water bath, so that it can be evenly distributed by hand or with a large wide
brush as a creamy release agent, to compensate for all unevenness and depressions. This creates
a uniform surface, which is well suited for moulding with silicone.
The same procedure applies to pre-treatment of old, fragile wooden parts, such as reliefs from
bog oak, etc. Cracks in the wood parts are filled with the soap, so that a smooth mould model
surface is produced, and so that all structures of the wooden object are still visible, but comprehensively coated with just a thin layer of soap. The soap serves as a release agent, which is
washed out of the models with hot water, after completing the moulding process. After drying, the
mould parts are almost like new and definitely clean.
60 647
Form release soap (transparent)
250 ml
Plastic tin
PE 6
60 648
Form release soap (transparent)
800 ml
Plastic tin
PE 3
Tube
PE 3
Silicon mould adhesive
To be able to reuse torn silicone moulds, the cracks should be cleaned carefully
with silicone remover. After complete airing and drying, this adhesive is applied on
both sides. Then the cracked parts are pressed firmly together. Approx. 4-6 hours
later, the mould will be firmly glued and the repair completed. It can be used again
after another post-reaction time of approx. 2 hours.
Package content:
1 tube of silicone adhesive form 80 g
1 tube key
1 long, narrow nozzle
1 instructions for use
60 481
Silicone mould adhesive
80 g
Mould-making techniques
Silicon mould extender (expander)
Immersing a finished silicone mould in this medium will proportionally expand it by up to 10%.
A short time after immersing the form in the silicone mould extender, it will begin to swell and
reach its maximum form expansion within a period of 1-2 hours. It is then removed from the
mould extender, rinsed with water, dried with a woolen cloth and can be immediately filled with
the chosen casting material.
After hardening, the reproduction model produced must be carefully removed from the mould.
Within a few hours, the mould will shrink back to its original size due to the evaporation of the
mould extender.
60 667
Silicon mould extender (expander)
500 ml
Plastic bottle
PE 3
60 668
Silicon mould extender (expander) 1000 ml
Plastic bottle
PE 3
Make your own moulds (Klaus-P. Lührs)
With liquid moulding materials from model to replica
The casting of an object is one of the most difficult and certainly most interesting of craft techniques. It is not only unique, but also fascinating, when a mould for casting of a replica model is
completed with the help of a rubbery silicone material from an original model. Consequently, it
is understandable that it is important to know beforehand not only about the materials and their
processing, but also to learn about the what and how of mould-making technology. This is what
this book is about. It travels step by step into the interesting realm of this design technique,
explains the differences between various casting materials, and describes which product is
best suited for which mould-making technique. It shows instructions in words and pictures to
follow for making a simple, one-part mould that can be used for casting a relief and provides a
guide for making a multi-part figure mould. All this is a knowledge transfer that makes understanding and getting to know this Mould-making technique easy and quick to learn.
Nevertheless, this knowledge is insufficient for experienced mould makers, as each master
model calls for its own methodology for mould making. In addition, basic knowledge for the
pre-treatment of the originals and the use of mould release agents is required. Both are important because each mould can be filled with aqueous or solvent-based casting materials, each of which requires a
different release agent. And because there are not only moulds made of silicone or gelatin, a latex form may be more suitable in certain
cases, possibly because it is often more cost-efficient. This shows that not only the moulding material, but also the use of a mould with
the material selection is important. „Make your own moulds“ covers the whole spectrum of traditional craftsmanship. It begins with a
quick impression of your own hand, the production of a tubular shape made of latex and finally leads to the classic construction of a
silicone mould. This knowledge includes all subtleties and tricks that were previously told orally by the master to his apprentice. This
alone justifies the purchase of this great book. It also addresses issues that go far beyond the production of a two-part mould, showing
how, for example, to form objects for complex hollow figures, bisquit parts, and last, but not least, how to make heat-resistant pewter
casting moulds. This is a great reference book written and compiled by a recognised expert of mould-making techniques.
240 pages, 75 graphics with over 200 colour illustrations.
05 172
Formen selbst gemacht (German)
Instruction book
PE 6
05 173
Make your own moulds (Englisch)
Instruction book
PE 6
Klaus-P. Lührs
Lexikon
der Formbautechnik
Mould-making lexicon (Klaus-P. Lührs)
This small reference book has it all. It includes all terms of mould-making techniques from
A to Z. It describes everything that is important to know about processing liquid mould materials, with key terms exactly described and explained. This includes technical terms that
are frequently used, but which hardly anyone knows properly, e.g. absorbing agents, elastic
modulus, cone shape, prototype design, tensile strength, sandwich moulds, Shore hardness,
thixotropic behaviour, vulcanisation interferences, air holes, etc.
The book contains more than 180 terms, 36 pages.
1
05 165
Mould-making lexicon- only available in German
Book
PE 6
33
34
Mould-making techniques
8. Food moulding with Schokomould
Schokomould is a low-viscosity, pourable and spreadable RTV silicone rubber mixture which is particularly
suitable for the production of silicone baking moulds due to its extensibility, elasticity and natural non-stick
properties. Schokomould moulds are characterised by a long service life. Because of its statutory food safety
approval, it is particularly well suited for casting hot, liquid chocolate, pralines and sugar compositions, as well
as biscuit and pastry doughs.
Mixing ratio: 100 parts by weight Schokomould and 10 parts of hardening agent.
The finished mould mixture is applied by pouring or brushing it onto the mould model and hardens at room temperature within 4-6
hours to form a solid, dimensionally stable yet flexible mould, which is characterised by a high tear resistance.Praline and chocolate
manufacturers constantly praise the high max. 230 °C temperature tolerance of the Schokomould moulds, which can therefore be
filled with all sugar, chocolate or cake mixtures.
In addition to 2-dimensional (relief-type) models (chocolate, pralines, confections, biscuits and pastries), it is also possible to cast
sculptured 3D figures or models in two-part moulds.
Food safety regulatory approval
This silicone meets the requirements of the migration tests of the European Directive 1935/2004/EC and therefore may come into
contact with food.
Technical Details:
Test Method
Value
Colouringas deliveredivory
Density at20 °C g/cm3
DIN 53479 A
1.13
Mixing ratio %
Silicon : Vernetzer
100 : 10
Pot life at 20 °C
temperature dependent
60–180 Minutes
Curing time at 20 °C
temperature dependent
6–10 Hours
Shore hardness A after 14 daysDIN 53505 / ISO 868
26
Elongation at break %
DIN 53504 S1 / ISO 37
600
Tear strength N/mm2
DIN 53504 S1 / ISO 37
4.2
Tear resistence N/mm2
ASTM D 624 B
22
Viscosity dynamic at 23 °C Brookfield mPa.s
22.000
Shrinkage %linear0.1
Temperature resistance
of the cured form
230 °C
Schokomould silicone is supplied with the appropriate Schokomould hardener,
a mixing bowl, and instructions for use.
60 457
Schokomould Silicone
450 g and Schokomould-hardener
50 g =
500 g Tin
PE 3
60 458
Schokomould Silicone
860 g and Schokomould-hardener
90 g =
950 g Tin
PE 3
60 459
Schokomould Silicone
5000 g and Schokomould-hardener 500 g = 5500 g Bucket
PE 1
60 459.25 Schokomould Silicone 25.000 g and Schokomould-hardener 2500 g = 27.500 g Bucket
PE 1
Schokomould hardener
While Schokmould silicone is always supplied together with the hardener required for curing,
this is also available individually as replacement material. Only this hardener is a suitable
crosslinking agent, meeting all food regulations for curing this food-grade silicone moulding
material, as it is also based on a biological, pollutant-free composition.
Schokomould hardener must be mixed with silicone in a 1 : 10 ratio.
60 456.10 Schokomould-hardener
90 g
Plastic bottle
PE 3
Mould-making techniques
Instructions for the Proper Use of Silicone Bakeware
The ability to produce edible food figures like sweets and pastries has long been desired by candy-makers and
pastry chefs. With this great casting silicone „Schokomould“ it has finally become a reality.
Model construction: For model preparation use a common modeling clay that you shape by kneading and moulding, so that the desired model is created, which you have imagined for your cake, biscuit, chocolate, frosting,
or marzipan production.
Make Your Own Silicone Forms:
Place the finished model parts for moulding into a form casting frame. Paint it over with mould release wax. This is followed by the
carefully pouring the mixed Schokomould material with hardener, which will initially fill only in a small amount of the containment
field. It should be just enough that you can carefully spread the material with a soft brush over all mouldings, and thereby prevent the
inclusion of air bubbles. Pour Schokomould into the frame so that the the highest form of the model is thus covered by about 6 mm.
There is nothing more to do. Then the moulding material hardenes. After 6 hours, the finished hardened elastic form can be removed
from the casting frame.
Let them harden another day. Then, place the mould in the oven at a temperature of about 50-60 ˚C to anneal. This is important because it allows the cleavage products, i.e. alcohol radicals that still may be in the form, to outgas. Thereafter, the mould is ready, so
that you can it make many sweets and baked goods from it.
Clean the Completed Form:
Clean the mould with hot water and detergent and dry them thoroughly. Your home-made silicone mould is finished and ready for use.
Coat Mould with a Release Agent:
As with all other forms you must use a „mould release agent“ here. Since you are working with foods, you can choose between grease
or flour. Both options ensure that manufactured parts of pastries or sweets do not adhere (stick) in the form.
Fill Form with Chocolate or Pastry Material:
This form is easy to use in contrast with very thin „commercial forms“. Above all, it has, it has a firm footing, which is why you first
pour the casting material in small quantity into the small forms and distribute or paint it with a brush. This will prevent any air bubbles
from adhering to the mould edges that deface the cast parts with ugly holes.
Cooling the hot basting materials in the mould:
After completely filling the moulds with hot sugar paste or chocolate, these materials need to cool and harden even more. It is different
when filling dough for pastries and cookie mixtures. The filled silicone mould is placed in the oven, and processed according to further
baking provisions. The heat resistant silicone is resistant to the temperatures used for it in the oven, and even offers the guarantee
that the contained biscuit or pastry mixes will cook evenly.
Cleaning the silicone mould:
After use, the silicone mould should be dipped in hot soapy water. Hard and crusty pastry residues will soften and can be easily removed.
Storing the moulds:
In order to use the moulds as long as possible, you should store them in an airtight, sealable plastic bag. If the mould will not be used
for extended periods, it is advisable to rub it with mould talcum (a special mould powder) so that it stays supple and does not age too
quickly. Residues of this powder can be easily washed out of the mould with warm soapy water before reuse.
35
CREARTEC® trend-design-gmbh
Lauenbühlstrasse 59 · DE 88161 Lindenberg/Allgäu
Tel. 00 49 83 81/80 74 00 · Fax 00 49 83 81/80 74 0-10
E-mail: [email protected]
ISBN: 978-3-939903-25-3
05 167
DE: 3,60 €
AT: 3,80 €
CH: 4,00 CHF
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