SDP Technical Guide - Mitsubishi Imaging

Mitsubishi
Silver DigiPlate
Technical Guide
TM
Mitsubishi
Imaging ( MC), Inc.
555 Theodore Fremd Avenue, Rye, NY 10580
(800) 765-9384 ¥ www.mitsubishiimaging.com
Mitsubishi
Imaging ( MC), Inc.
11/99
Table of Contents
Introduction..............................................................................3
Structure....................................................................................4
Spectral Sensitivity ..................................................................5
Reading the Silver DigiPlate Label .......................................6
Silver DigiPlate Material Specifications ...............................7
Exposure ..................................................................................8
Calibration ..............................................................................12
Processing Conditions ..........................................................13
Chemistry ...............................................................................14
pH ............................................................................................15
Replenishment .......................................................................16
Printing ..................................................................................17
Fountain Solutions.................................................................18
Press Start-up .........................................................................20
Inks ..........................................................................................21
Plate Storage...........................................................................21
Deletion ...................................................................................21
Troubleshooting .....................................................................22
Quality Control Log ..............................................................25
The Technical Guide was printed using Mitsubishi Silver DigiPlateª polyester plate material.
This guide is the property of Mitsubishi Imaging (MC), Inc. No portion of this guide may be
reproduced without written permission.
1
Introduction
Mitsubishi Silver DigiPlateTM material is an offset printing
plate based on Silver Halide Photographic principles.
The plate is imaged by a laser imagesetter or platesetter
and then processed in SilverMaster¨ Activator and
Stabilizer. This direct-to-plate process eliminates the
need for intermediate steps such as film making, masking
and stripping.
Silver DigiPlateTM materials provide excellent printability
with minimal effort. Digiplate is compatible with almost
any laser imagesetter and virtually all offset presses.
This manual is intended to give an overview of Silver
DigiPlate material, explain its properties and provide
some set-up and troubleshooting techniques for operators
working with this material.
Mitsubishi
Imaging ( MC), Inc.
Tech Support: 800-765-9384 ext. 3261
www.mitsubishiimaging.com
2
3
N O T E S
Structure
Silver DigiPlateTM material is a direct offset plate material
based on the diffusion transfer reversal process.
N O T E S
Spectral Sensitivity
TM
Silver DigiPlate material is available for different laser
exposure devices.
Thickness (Approx.)
Positive Layer
Silver Halide
Emulsion Layer
Anti-halation Layer
Polyethylene
Coated Layer
Paper Base
Back Coated Layer
Positive Layer
Silver Halide
Emulsion Layer
Helium Neon 633nm to Red Laser Diode 680nm
SDP-RR 175
SDP-FR 100
SDP-FR 175
Paper Base
Film Base
Film Base
.008Ó (.020mm) thick
.004Ó (.010mm) thick
.008Ó (.020mm) thick
Infrared Laser Diode 780nm
SDP-FD 100
SDP-FD 175
Film Base
Film Base
.004Ó (.010mm) thick
.008Ó (.020mm) thick
Anti-halation Layer
Spectral Sensitivity
SDP-RR
175
SDP-FR 100, 175
He-Ne to Red Laser Diode
633-680 nm
Polyester Base
SDP-FD 100, 175
Infrared Laser Diode
780 nm
Silver DigiPlateTM is a POSITIVE working material.
This means:
¥ The area exposed to light becomes visibly black.
¥ The area which has NOT been exposed to light turns silver.
The actual silver precipitated on the image area of the
plate surface has a high lipophilic property and is receptive
to printing ink (oil). The non-image area has a hydrophilic
property, which means that it is impervious to printing ink
but receptive to fountain solution (water).
Light
Light
Relative Sensitivity
Back Coated Layer
400
500
600
700
800
900
Wavelength (nm)
Run Length Information:
Polyester Base
25,000 impressions
Paper Base
10,000 impressions
Silver Image
4
5
How to read the Label on
Silver DigiPlate Materials
N O T E S
TM
N O T E S
Silver DigiPlate
Material Specifications
TM
SDP-F R 175
SDP-R D 125
SDP =
Silver DigiPlate
BASE
F = Polyester Base
R = Paper Base
LASER SOURCE
Silver DigiPlate is shipped to the end-user in roll form.
Refer to the chart below for current material
specification information.
Current Silver DigiPlate (SDP) Specifications
Spec. #
Core I.D.
28
28SD
28R
28RSD
2.0Ó (50.8 mm)
2.0Ó (50.8 mm)
2.0Ó (50.8 mm)
2.0Ó (50.8 mm)
820
820SD
820R
820RSD
867
989SD
989LD
989RSD
989RLD
2.0Ó (50.8 mm)
2.0Ó (50.8 mm)
2.0Ó (50.8 mm)
2.0Ó (50.8 mm)
2.0Ó (50.8 mm)
2.805Ó (72.5 mm)
2.805Ó (72.5 mm)
2.805Ó (72.5 mm)
2.805Ó (72.5 mm)
Emulsion
Winding
Description
Base
Material
In
In
Out
Out
Bulk Roll
Simple Daylight
Bulk Roll
Simple Daylight
Cassette
Limited Daylight
Paper
Paper
Paper
Paper
Paper
Paper
In
In
Out
Out
In
Out
Out
In
In
Bulk Roll
Simple Daylight
Bulk Roll
Simple Daylight
Cassette
Simple Daylight
Limited Daylight
Simple Daylight
Limited Daylight
Polyester
Polyester
Polyester
Polyester
Polyester
Polyester
Polyester
Polyester
Polyester
Bulk Roll
Polyester
R = Red Laser Diode or HeNe Sensitive
D = Infrared Sensitive
Cassette = Disposable roomlight handling cassette
Simple Daylight Load (SD) = Paper end flanges, No black leader
Limited Daylight Load (LD) = Plastic end caps, No black leader
THICKNESS
100Õ lengths have 3mm core wall thickness
200Õ lengths have 5mm core wall thickness
100 = 5 mil thick Polyester
175 = 8 mil thick Paper & Polyester
6
7
Exposure
Silver DigiPlate material is a first-generation plate.
The image is transferred directly onto the plate and
does not go through the interim step of making film
and transferring the image to plate. Because it is firstgeneration, it is imperative to expose and process this
material under proper conditions.
When exposing Silver DigiPlate material, always employ
the negative exposure mode. The finished product should
be a negative image (silver image on black background)
and a right-reading copy (used for offset printing).
N O T E S
N O T E S
Follow the steps below to determine and maintain correct
exposure on Silver DigiPlate material.
Recommended Exposure Method
Determine Initial Exposure Settings:
¥ Prepare a digital file consisting of positive and negative
thin lines which will be output by the imagesetter (see
figure #1) or use the Mitsubishi Paper Mills digital
exposure target (See figure #2, below, and next page).
This target is available at the Mitsubishi Imaging (MC),
Inc. website, located at www.mitsubishiimaging.com.
¥ Output this file at different exposure settings.
¥ Use a loupe (30-50 Power) to inspect the point at which
the positive and negative lines intersect. Optimum
exposure is reached when the positive and negative
thin lines are equally reproduced.
Silver
Image
Figure #1 — Exposure Level
Optimum
Under
Over
Short Run
Length
Toning
Broken Image
Bold Image
S
I
L
V
E
R
S
I
L
V
E
R
S
I
L
V
E
R
Figure #2 — Digital Exposure Target (partial)
8
1
1
1
1
2
2
2
2
3
3
3
3
4
4
4
4
6
6
6
6
8
8
8
8
10
10
10
10
9
N O T E S
Mitsubishi Silver DigiPlate Test Pattern
1
1
1
1
2
2
2
2
3
3
3
3
4
4
4
4
6
6
6
6
8
8
8
8
10
10
10
10
BW/Pattern 1 (Ver1.0b2)
150
175
200
lpi
3
Nega/Posi Line (beam)
5
Times-Roman
10
abcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyz
Times-Italic
20
abcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyz
Times-Bold
abcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyz
30
Times-BoldItalic
100
abcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyz
40
Helvetica
abcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyz
abcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyz
100
Helvetica-Bold
abcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyz
abcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyz
abcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyz
70
0.02
0.04
0.06
0.08
0.10
0.20
0.40
7
14
21
28
35
70
140
Mitsubishi Paper Mills Kyoto R&D Center
80
SDP-FD
SDP-RD
1.43
SDP-FR
SDP-RR
1.39 - 1.40
¥ Subtract (.06 to .07) from the value read. This new value
represents the Optimum Density of the plate. For SDP-RR
use (.03 to .04) to subtract from maximum density.
¥ Output and process a plate that has been exposed by
the laser imagesetterÕs light.
abcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyz
95
Courier-BoldOblique
97
abcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyz
Tint Wedge Chart
StarBurst Chart
Nega/Posi Fine Line
(Adobe Illustratorª)
Image Wedge Chart
Refer to the following Sample Exposure:
Maximum Density reading
To reach Optimum
1.43
- .06
Optimum Density (+/- .01)
1.37
Output a sample plate of the work to be printed to
optimize exposure.
SDP TEST PATTERN
DATE
:
MATERIAL
:
IMAGESETTER:
RESOLUTION :
DENSITY
:
¥ Adjust the laser setting to reflect the Optimum Density.
90
6pt
Courier-Bold
Font
¥ Using a reflective densitometer, measure the background
density of the plate that has been exposed ONLY by daylight.
This represents the Maximum Density of the plate, also
referred to as D-Max. Examples of Maximum Density:
60
Helvetica-BoldOblique
Courier-Oblique
¥ Expose a piece of SDP material to daylight for
approximately 2 minutes.
50
Helvetica-Oblique
abcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyz
An alternate method of checking exposure follows:
¥ Process material under optimum conditions (correct
chemistry temperature, pH & speed parameters).
133
Courier
Optional Exposure Method
/
/
Increase the laser intensity if the background is too low
or not black enough. Decrease the laser intensity if the
background is too dark or too black.Symptoms of an
incorrectly exposed plate include:
Under Exposure
Some of the silver emulsion comes to the plate surface.
This may result in background toning and printing of
the lines.
Over Exposure
Excessively thin characters are observed or fine lines drop
out. If a plate is overexposed, fine lines become thinner
and may break up when printed. The run length of the
plate may also decrease, even though the image looks good.
10
11
Calibration
The focus and exposure conditions must be set before
performing the imagesetter dot size calibration. The
procedure for calibrating the imagesetter is done in two
steps. The first step is to linearize the imagesetter so that
the input data dot % values and output recorded dot %
values on film (or SDP) are equal or linear. The second step
is the calibration for the printing process. The objective in
this calibration step is to generate a transfer curve that is
characteristic of the printing conditions for the job. The
transfer curve is used in the RIP to generate film or plates
that will print with the optimum tone reproduction.
Note that the procedures are given for calibration of a
conventional system (film output and aluminum metal
plates). The transfer curves for the conventional system
will be used as targets or standard curves for calibration
of the imagesetter to output Silver DigiPlate.
Standard Calibration:
Use delivered value on imagesetter RIP
Process Calibration:
1. Make output of dot wedge pattern on the SDP with
standard screen gradiation curve for imagesetting film.
N O T E S
N O T E S
Processing Conditions
Silver DigiPlate is processed in SilverMaster SLM-AC
Activator and SilverMaster SLM-ST Stabilizer. This is
the same chemistry used to process SilverMaster camera
plate material.
Both the Activator and Stabilizer come in a concentrate
solution of 4x1 gallons (15.2 liters) to the case.
¥ Activator should be diluted with water at a 1:1 ratio.
¥ Stabilizer should be diluted with water at a 1:3 ratio.
Development Time
20-30 Seconds
Activator Temperature
82-88o F (28-31o C)
Stabilizer Temperature
Room Temperature
Dryer Temperature
100o F Paper (38o C)
110o F Polyester (43o C)
Activator
Replenishment Rate
2. Print with this plate under the same conditions as the
metal plate.
Stabilizer
3. Measure the dot % of the printing copy.
Water
(if provided in processor)
Replenishment Rate
.5 oz/ft2 (150 ml / m2)
.625 oz/ft2 (200 ml / m2)
Room Temperature
Batch or Replenishment
4. Evaluate the actual dot % values compared with the
values of metal plate. If you notice a difference, change
the screen gradiation curve in the RIP.
12
13
Chemistry
What happens in the Activator?
As the plate enters the activator the latent image in the
emulsion layer is turned black. Meanwhile, the unexposed
silver halide in the emulsion layer is dissolved and diffuses
onto the positive layer. The dissolved silver halide reacts
with physical developing nuclei in the positive layer and
results in the formation of metallic silver.
What happens in the Stabilizer?
After the development is completed, the plate enters
the stabilizer solution where the high pH on the plate is
neutralized.
The pH of the silver image is lowered to a value more
suitable for offset printing. Other properties that ensure
stable storage for a period of time are also imparted during
stabilization.
Why is the Roller configuration in my processor
so important?
The optimum roller configuration of the rack inside the
Activator tank is where the entrance rollers are completely
outside the chemistry or are completely submerged in liquid.
Note that wet entrance rollers can cause pre-development
to occur on the plate. This means that the plate starts to
develop and then stops because it does not have enough
Activator to complete the process. Once this occurs, areas
of the plate are only partially developed and will not
continue to develop fully as it continues through the tank.
Dry Entrance Rollers
N O T E S
N O T E S
pH
Consistent output requires maintenence of the processing
conditions. By monitoring the pH of the SilverMaster
Activator and Stabilizer you will always know when itÕs
time to change your chemistry.
pH is a measurement of the value of acidity or alkalinity of
a particular solution. The pH scale goes from 0 to 14 with 0
being the most acidic and 14 being the most alkaline.
Calibrate your pH meters using a buffered solution. Both
SilverMaster Activator and Stabilizer are highly buffered
solutions. Use undiluted chemistry fresh out of the bottle
to calibrate the pH meter.
Use separate pH meters for each chemistry.
pH meters are normally calibrated at 3 standard buffer
solutions. These solutions are at a pH reading of 4.0, 7.0,
10.0. Because the Activator pH is so high (13.6), the range
of the meter cannot measure it accurately.
On this scale, each successive number is 10 times the pH
value of the last number. For instance, 8 is ten times as
alkaline as 7, and 9 is 100 times as alkaline as 7.
The ability of a relatively simple pH meter to measure
accurately at both the bottom of the scale and at the top of
the scale at the same time is doubtful with one meter.
For this reason, two meters are needed for monitoring.
Your meters should be calibrated just before use and they
should be calibrated to the solution of a known pH fairly
close to the pH of the solution to be tested.
Measure and chart your pH readings daily.
(See chart at end of Technical Guide)
Activator Level
If processor is not as described, please check with your
processor manufacturer to determine if a conversion kit
is available for your make or model machine.
14
Activator
In the Bottle
Diluted 1:1 with water
Change when pH reaches
13.6 pH
13.5 pH
12.8 pH or lower
Stabilizer
In the Bottle
Diluted 1:3 with water
Change when pH reaches
5.6 pH
5.8 pH
7.0 pH or higher
15
Replenishment
The replenishment of fresh chemistry into the processor is
done to maintain stable performance and chemistry life.
As long as the pH of the chemistry stays within operating
range, there should be no loss of chemistry performance.
The replenishment rate for SilverMaster Activator is
0.5 oz/ft2 (150 ml / m2) of material. To allow for the
carryover of the Activator into the Stabilizer, the
Stabilizer should be replenished at a slightly higher rate.
Stabilizer should be replenished at 0.625 oz/ft2 (200 ml/m2)
of material.
If the processor has Oxidation Replenishment, the
Oxidation Replenishment should turn over the entire
volume of the tank at least once between chemistry
changes.
Example:
A 12Ó x 200Õ roll of plate material will require around
100 oz. or about .75 gallons (2.85 liters) of replenishment
for Activator. The Stabilizer will require approximately
1 gallon (3.85 liters) of replenishment.
N O T E S
N O T E S
Printing
Silver DigiPlate material can be mounted on press immediately after it has been completely processed and dried.
The plates can run on virtually all offset presses using
their existing dampening systems and fountain solutions.
In some cases Mitsubishi fountain additives such as OA-1
and OA-2 can improve printability.
Punching / Bending for Press
Imagesetters designed for color work usually have their
own punching systems in order to aid in registration.
Press-specific punch holes are achieved by re-punching
in a separate device. Re-punching can be done on the
puncher provided by the press manufacturer or a special
transfer punch and trimmer from Ternes or Stoesser.
Unfortunately some imagesetters donÕt have a punch system.
In this case, it is necessary to develop a system of punching
by use of registration marks and the existing press punch.
Bending Polyester Plates:
Many types of web and some sheetfed presses equipped
with an automatic plate-loading system require the plate
to be bent before mounting. Polyester plates that are used
in these presses must be bent by thermal means.
Mitsubishi also offers machine solutions for this
application. Please contact your local Mitsubishi dealer
or Mitsubishi Sales Representative for information.
Press Conditions
Silver DigiPlate material initially requires 5-10% more
water than a metal plate on start-up. Confirm roller
settings and roller durometer before start-up. In general,
the press should be adjusted according to manufacturersÕ
recommended specifications.
Standard settings are as follows:
Ink form roller
Moisture form roller
1/8 - 3/16" (3-5mm) Stripe
5/32 - 3/16" (4-5mm) Stripe
Be sure not to over-pack the plate-to-blanket cylinder as
this can cause printing problems and shorten the life of the
plate. Refer to the Press Specifications and use as light a
pressure setting as possible without hindering ink transfer.
16
17
Fountain Solutions
The major brands of commercial fountain solutions will
work well with Silver DigiPlate material. Changing
between Silver DigiPlate and metal plates can be done
easily with the correct fountain solution mixture. Acidbased, neutral-based and alkaline-based solutions used
in conjunction with Mitsubishi wetting agents OA-1
and/or OA-2 will work very well.
Check Conductivity and pH to establish a starting point
for the chemistry mix and to monitor the solution during
its use. Conductivity is a measurement of how easily a
current passes through a solid or, in this case, a liquid.
By increasing the solution strength you will normally
increase the conductivity of the working solution. Some
solutions are formulated to work at an extremely low conductivity. Most solutions not containing alcohol substitutes
will range from 900-1500 in conductivity. Use the recommended directions on the solution for mixing ratio.
N O T E S
N O T E S
Fountain Additives OA-1 and OA-2
Under some conditions, Mitsubishi fountain additives
OA-1 and OA-2 can improve printing conditions.
OA-1 is an alcohol substitute. It helps the ink and water
to blend together better in the ink train to help establish
ink and water balance more easily. OA-1 is recommended
for use on presses with continuous dampening systems and
should be mixed at 1/2 oz. to 1 oz. per gallon (15-30 ml /
3.785 liters).
OA-2 is a much milder wetting agent. It helps to attract
and keep more water on the plate surface. It does not
affect solution conductivity and should be measured at
1/2 oz. to 2 oz per gallon (15-60 ml/3.785 liters).
Excessive amounts of OA2 may cause foaming in solution
recirculators. OA-2 is recommended for use on presses with
conventional dampening systems and with continuous
dampening systems when fountain solution includes
alcohol or alcohol substitute.
Mitsubishi produces two fountain solution formulas;
SLM-OD for conventional dampening systems and
SLM-OD50 for continuous dampening systems.
SLM-OD is formulated for use with conventional and
integrated dampening systems. The solution should be
mixed as directed, although some adjustments may have
to be made to accomodate for differences in tap water and
press conditions. Start with a dilution of 15 to 1. Normal
conductivity range is 900-1500.
SLM-OD50 is formulated for continuous dampening
systems and large web presses. This product is very
concentrated and should be mixed 1 to 50. As with SLMOD, adjustments may have to be made to accomodate
for differences in tap water and press conditions. Normal
conductivity range should be 100 to 300. OA-2 may be
mixed to provide better performance of the plate surface.
18
19
Press Start-Up
To prevent scumming on Silver DigiPlate during press
start-up, the plate must be sufficiently wet before the ink
form rollers are lowered onto the plate.
Lightly wipe down the plate surface using a soft sponge or
cotton pad soaked with either water or fountain solution.
For separated systems that separate the inking systems
and dampening systems, pre-wet the plate by engaging
the moisture form roller to the plate and allow 8 to 10
cylinder revolutions prior to engaging the ink form rollers.
This will prevent ink building up on the plate prior to
printing the copy.
NOTE: Silver DigiPlate material initially requires 5-10%
more water than metal plates on start-up. Once the plate
is running, less water is usually required than metal plates.
If stopping the press to make adjustments, you may have
to pre-wet the plate again.
N O T E S
N O T E S
Inks
Three kinds of basic inks that work well with Silver
DigiPlate are rubber-based, oil-based and soy-based.
Magnetic and UV inks will work but will usually shorten
the run-length just like metal plates.
Plate Storage
The following procedure should be followed for storing
Silver DigiPlate plates after they have been exposed and
processed. If not stored properly, they will not print
properly. Observe the following precautions:
¥ Dry the plates thoroughly.
¥ Avoid direct exposure to sunlight or other intense
illumination.
¥ Do not store under extreme conditions such as high
temperature or humidity.
¥ Do not store in places susceptible to harmful gases
or dust.
¥ Store in a drawer or black bag.
Under these conditions, the plates can be safely stored for
about one month.
NOTE: Plates that have been used on the press should be
discarded. It is not recommended to store or rerun plates.
Deletion
There are two types of deletion products to remove the silver image on Silver DigiPlateª Plates:
¥ SLM-OE liquid (2 x 100cc bottles per box)
¥ SLM-OEIII Pens (3 pens per box)
20
21
Troubleshooting
Symptom
Possible Cause
Remedy
Thin Image
Over-Exposure
Decrease exposure
— Thin Line
Over-exposure
Decrease exposure
— Partial
Fogged image,
parts missing
Inspect for light leak
Insufficient density
Under-exposure
Increase exposure
Thin silver lines covering
the entire plate area
Under-exposure
Increase exposure
Incorrect image size,
deformed image
Poor material transport
Inspect the transport
section
Poor press packing
Inspect blanket packing
Uneven development by
processor
Service rollers & gears
Uneven ink pressures
Check form roll pressures
Dirty mirrors on
output device
Contact imagesetter
manufacturer
Too high chemistry
temperature
Check temperature and
adjust
Contact with foreign
material in processor
Service rollers & guides
Plate left for long period
of time in a bright place
Store in black plate bags
or sealed file
Low processor
temperature
Check Activator temperature
Weak Activator
Change Activator
Deviation in light source
Adjust output device
Optical pollution of laser
Clean light path (mirrors)
Deterioration of Activator
Replace Activator solution
Low processing chemistry
level
Adjust chemistry level
Image drop-out
Uneven image
Scratches
Discolored Image
Uneven Density
22
N O T E S
N O T E S
Troubleshooting
Toning and Scumming
Toning/Tinting is a breakdown of the ink vehicle.
It cannot be cleared by adding water. Additional water
will make the condition worse.
Scumming is a dry plate. It can be cleared by adding
water. When more water is applied the scum disappears.
1. Remove the ink from the plate:
If the non-image area has received ink, use a mild plate
cleaner, diluted, to remove the ink. After removing the
ink apply fountain solution to a sponge and wet the
plate. Plate cleaner for metal plates is not recommended.
2. Check Press Conditions:
Check press conditions such as form roller settings
and durometer to confirm they are within the
manufacturerÕs tolerances.
3. Use Mitsubishi Additives:
The addition of fountain solution additives OA-1 and OA-2
to the fountain solution will help prevent scumming,
especially in the case of a press equipped with a
continuous dampener. For Alcolor and Komorimatic
dampeners add up to 1% OA-1. OA-1 improves the
water supply similar to an alcohol substitute.
For Dahlgren and conventional dampeners add
between 1-2% of OA-2. OA-2 will improve the water
receptiveness of the plate.
4. Change the Ink:
In the case of toning or tinting problems it may be
necessary to change to a higher tack ink. Low tack inks
will require monitoring of Fountain Solution pH.
23
Activator pH Concentrate (out-of-bottle) is 13.6
Activator pH should not go below 12.8.
Temperature of Activator should be 82°-88° F (28°-31° C)
REMINDERS:
24
Tem
p.
pH
Sta
bil
ize
r
Ac
tiva
tor
pH
Month _____________
D-M
Opt ax
imu
mD
ens
ity
Re
sol
uti
on
Op
era
tor
Tim
e
Da
te
Em
ul
Nu sion
mb
er
Quality Control Log
Sh
ift
N O T E S
Stabilizer pH Concentrate (out-of-bottle) is 5.6
Stabilizer pH should not go above 7.0
Temperature of Stabilizer is room temperature.
• Check level of replenishment containers
• Check that level in processing tanks is at the overflow level.
• pH of chemistry should be checked once per shift, upon roll
change and/or chemistry change
• Dryer temperature should be between 100°-110° F (38°-43° C)
• Density should be checked at each emulsion change
• Check rubber rollers in the transport system
25