Manual Spectro-Densitometer SpectroDens

Manual Spectro-Densitometer SpectroDens
TECHKON manuals, technical documentation and programs are
copyrighted. Reproduction, translation or transfer to an electronic
medium – in whole or in parts – is prohibited.
TECHKON software is the intellectual property of TECHKON GmbH.
Purchase of the software grants the user a license for the use on one
computer only. Programs may only be copied for back-up purposes.
TECHKON can not be held liable for any damages that may occur by
the use of TECHKON products.
The TECHKON team takes great care in producing this manual. Nevertheless, we can not fully guarantee the complete absence of errors.
TECHKON GmbH and the authors can not be held liable neither for
any possibly incorrect statements nor their consequences.
Products that are not made by TECHKON GmbH are mentioned for
information purposes only and such statements do not represent
trademark infringement. All registered trademarks are recognized.
TECHKON products and product names are registered internationally
under several intellectual patents and trademarks.
Specifications can be subject to change without notice.
Version 3.1, November 2013
You can reach us at the following address:
Wiesbadener Str. 27 • D-61462 Königstein/Germany
T +49 (0) 6174 / 92 44 50 • F +49 (0) 6174 / 92 44 99 •
We welcome you among the worldwide community of users of TECHKON products.
We are happy that you have selected this high-quality measurement instrument. It will
be a valuable tool for your day-to-day quality control tasks. With this manual we invite
you to learn how to use SpectroDens.
The manual is divided into three chapters:
Chapter 1:
How to use TECHKON SpectroDens
Chapter 2:
Description of the measurement functions
Chapter 3:
How to use the Windows software SpectroConnect
For the first steps we recommend to read chapter 1; in particular paragraph 1.4.
You will be fascinated that after only 15 minutes you will know how to work with
SpectroDens. The second chapter will show you detailed insight into the measurement functions and chapter 3 is about the Windows software SpectroConnect, which
is part of the package.
Please get the device registered by using the detachable registration card, which you
will find in the appendix of this manual. That way we can keep you updated about
product news.
Please visit us as well on internet at You will find useful information
about the complete product range and new software versions.
Do you have any suggestions for improvements or do you require information that
goes beyond the contents of this manual? We will be glad to hear from you. Your suggestions or questions make an important contribution to the continuous optimization
of our documentation and products.
Chapter 1: How to use TECHKON SpectroDens
1.1 Product description............................................................................................................................ 5
1.2 Packing list................................................................................................................................................ 8
1.3 Design of SpectroDens..................................................................................................................... 9
1.4 Working with SpectroDens...........................................................................................................11
1.5 Care and maintenance.....................................................................................................................19
Chapter 2: Description of the measurement functions
2.1 Measurement functions of SpectroDens Basic................................................................ 34
2.2 Additional functions of SpectroDens Advanced............................................................ 50
2.3 Additional functions of SpectroDens Premium...............................................................62
2.4 Storage of measurement values............................................................................................... 72
Chapter 3: How to use the Windows software SpectroConnect
3.1 Software description.........................................................................................................................75
3.2 Installation................................................................................................................................................75
3.3 Overview...................................................................................................................................................76
3.4 Software module: SpectroDens settings............................................................................ 77
3.5 Device update and device upgrade........................................................................................78
3.6 Software module: Export...............................................................................................................79
3.7 Software module: ColorCatcher............................................................................................... 80
3.8 Software module: PhotoLab........................................................................................................81
3.9 Software module: MediaWedge............................................................................................... 84
3.10 Software module: Transfer curve.............................................................................................. 86
3.11 Software module: ISO-Report.................................................................................................... 88
3.12 Software module: SpectroCheck............................................................................................. 89
Manufacturer certificate
EC-Declaration of Conformity
Registration card
Chapter 1 – How to use TECHKON SpectroDens
Chapter 1
How to use TECHKON SpectroDens
1.1 Product description
SpectroDens is an all-purpose, modern measurement device. Whether it be in preprint for verifying proofs, for ongoing quality control at the printing press, during delivery inspection of paper and print products or in a color lab, SpectroDens is exceptionally suitable, whatever the application is. Thanks to the individually adjustable display
functions, you can quickly set up the device for your particular job.
SpectroDens is the result of more than 25 years of experience we have as a longestablished company in the development and manufacture of high-quality spectral
measurement technology.
As with all TECHKON products, the innovative Spectro product series was designed by
applying our four powerful principles for perfect measurement devices:
 Easy and fast to use
 High measurement accuracy
 Solid and reliable
 Functional and attractive design
The product name alone suggests the multiple uses of SpectroDens. As a spectrodensitometer, it combines the qualities of a highly accurate spectro-photometer and
an easy-to-use densitometer. Measurement is spectral, i. e. the entire color information
– the spectral fingerprint of the color – is precisely registered. The measured spectral
data is converted into measurement data for descriptive analysis and display.
The robust design makes SpectroDens a reliable tool for quality control even in a harsh
industrial environment. Direct positioning of the measurement head on the measurement field ensures a secure and quick measurement. The device works strictly according to the standards valid for the graphic industry. Select different status filters for
density measurement among the device settings. A special technical feature is the
polarization filter which can be activated via the push of a button.
The completely new designed instrument is not just smaller and more ergonomic, it
is equipped with a high resolution color display. Color is not just measured, it is shown
on the display as well. Understanding CIE L*a*b* values is now easier than ever before.
Using the latest LED technology, the instrument can provide also D50 illumination and
is fulfilling the M0 – M3 measuring conditions in accordance to ISO 13655. Lifetime of
Manual TECHKON SpectroDens
the LED illumination is nearly unlimited. With the new design of the measuring head
the instrument supports a wide range of print media.
Beside single measurements the instrument can do short scan measurements as well.
This will speed up the control process and reduce measurement time. Tracking wheels
on the bottom ensure a straight run and allow the user to scan color patches or a step
wedge fast and easy.
Cables are not longer necessary to transmit data to the computer. The new instrument
can be connected to a WLAN network to send information via wireless data transmission to the computer. Of course SpectroDens still offers USB cable connection as well.
The SpectroConnect software supplied with the device explicitly displays measurement data on a computer monitor. Measurement data can be transferred into Microsoft Excel™ or other applications. The software also serves as the connecting module for other applications, e. g. programs for the production of characteristic printing
curves or colorimetric quality control.
All advantages of TECHKON SpectroDens at a glance
 High-quality spectral engine
 Patented measurement head for
exact and direct positioning
 Quick measurement (approx. 1 sec.)
 LED technology with D50 illumination
fulfilling M0 – M3 measuring condi tions in accordance to ISO 13655
 Insertable polarization filter by push
of a button
 Tracking wheels provide short scan
 Conform to ISO and DIN standards
 Exceptionally suitable for measure ment of the Ugra/Fogra media wedge
 Absolute white standard integrated
and protected in charging console
 Rechargeable, high-capacity battery
with quick recharge power manage ment on practical charging console
for up to 10.000 measurements per
battery charge
 Large, high-resolution color graphic
 USB-port for easy transfer of measure ment data to a PC, for the import of
“digital” color books and for the
download of additional functions;
WLAN optional
 Self-explanatory operation
 All measurement functions and
languages are easily selectable
 Automatic measurement function dis plays always the relevant values
 Ergonomically positioned, user-friendly
measurement button
 Measurement values can be memo rized with date and time tag
 Durable precision
 Handy and compact, low weight
 Well-designed
Chapter 1 – How to use TECHKON SpectroDens
Three different performance packages
We supply SpectroDens in three types of performance packages: The model Basic
with all density functions and the Advanced version which adds essential colorimetric
functions and a color library. The fully equipped flagship model SpectroDens Premium
meets all demands with regard to quality control. All SpectroDens devices can also be
used for short scans and feature a brilliant color display. Optionally data transmission
by means of a WLAN module is possible.
SpectroDens can be upgraded post-purchase by program upload to higher versions
(charged service).
SpectroDens Basic
 Automatic density  Density CMYK (with reference measurements)  Dot area  Dot
gain  Print contrast  Gray and color balance  Ink trapping  Printing curve  Density
spectrum  Spectral density for spot colors  Trend function ExPresso mini  Slur/doubling  Dot area to Yule-Nielsen for printing plates  LED technology provides measurement conditions M0 – M3 according to ISO 13655
SpectroDens Advanced
Same functions as SpectroDens Basic and additionally:
 CIE L*a*b*  ΔE*a*b*  CIE L*C*h*ab  CIE XYZ  CIE color circle  ΔE*cmc  ΔE*CIE94
 ΔE*CIE2000  Remission spectrum  InkCheck: Color control of spot colors  Color library with up to 20 color books and a total number of 3000 reference values  Memory
capacity for 1200 sample values and 300 reference values  GrayGuide according to
Gracol G7™
SpectroDens Premium
Same functions as SpectroDens Advanced and additionally:
 Ugra/Fogra media wedge evaluation  ISO-Check: Color control according to ISO
12647  CIE L*u*v*  CIE L*C*h*uv  CIE xyY  DIN Lab99  Metamery index  Whiteness
 Yellowness  Pass/fail tolerance  Average
Manual TECHKON SpectroDens
1.2 Packing list
Contents of delivery
 Measurement device SpectroDens
 Carrying case
 Charging console with integrated
absolute white standard
 AC adapter with universal plugs
for Europe, UK and USA
 This manual with ISO 9000 compliant
 USB cable for PC connection
 CD with Windows software
(the CD is attached on the last page
of this manual)
The carrying case protects SpectroDens and
Optional accessories
 Exchangeable apertures
 Print Control Strip TECHKON TCS
(the Digital Print Control Strips TECHKON TCS can be downloaded free of
charge at
 Device upgrades for Basic- or Advanced-models to higher functionality
 Color reference SpectroCheck
 WLAN card
Replacement parts:
 Charging console with white standard
 AC adapter
 Rechargeable battery
You will find the technical specifications in the appendix of this manual.
Chapter 1 – How to use TECHKON SpectroDens
1.3 Design of SpectroDens
SpectroDens is a solidly designed measurement device which is very functional and
easy to use. It is compact in size; the buttons can be reached with the right index finger
when the device is held with the right hand. The LCD display is inclined towards the
user, so the display information can be read clearly.
SpectroDens can be easily positioned on the measurement sample.
Charging contacts
Device label with
serial number
Battery case
for PC connection
Green measurement
button (also for
switching on)
Device display
Tracking wheels
Navigation buttons
Right hand
grip zone
The device incorporates a high-resolution spectral sensor which analyzes the color
spectrum of the measured sample. The spectral data is the base information for calculating densitometric and colorimetric data which is displayed. Densitometric values
can be solid density, dot area, dot gain or trapping values. Colorimetric values are typically CIE L*a*b*- or ΔE*-color information.
The USB-connector is for linking with a PC. The USB-cable with a Mini-USB plug, which
fits into the connector at the back of the device, is part of the package.
Manual TECHKON SpectroDens
The charging console incorporates an absolute white standard which is protected
against light and dust. Turning the black wheel releases the white standard from the
protected position.
The ceramic white standard should not be touched and should always be kept clean.
Therefore we recommend to keep it in the protected position and only to turn it out
during the calibration procedure.
1. The black wheel can be turned to bring
the protected absolute white standard in
position for the calibration procedure
2. Charging contacts
3. Low voltage connector for the plug of the
AC adapter
The above image shows how to connect the plug of the AC adapter with the charging
console. The AC adapter can be used universally for 100 – 240 V and 47 – 63 Hz.
There are three adapter plugs for different countries. To change an adapter plug, just
pull it off the AC adapter and push in the new one. Make sure it is connected firmly.
Use only the original TECHKON SpectroDens AC adapter. The use of other power
sources is hazardous!
AC adapter with three different mains plugs
Device in the state of charging
Chapter 1 – How to use TECHKON SpectroDens
1.4 Working with SpectroDens
Switching on and off
SpectroDens is switched on by pressing the green measurement button. It is immediately ready to measure. In this state power consumption is very low.
If no button is pressed within one minute, the device will switch off automatically.
Switching it on again with the green measurement button will show on the display
the last measurement done. There is no button to turn SpectroDens off.
The battery status is displayed as a battery symbol in the upper right corner of the
LC-display, when the unit is turned on.
When the battery turns empty, the battery symbol turns to red. In this state several
measurements still can be obtained; but it is time to put it on the charging console to
avoid a total discharge and damage of the battery.
Charging starts automatically by placing the device on the charging console. Please
keep the charging contacts on the console and under the device always clean. If oxidized, use a special metal contact cleaner.
Five seconds after placing the device on the console the display will show an animated
battery symbol. When the symbol displays a full battery, the charging is completed
and the battery is fully charged. Completely charging an empty battery will take approximately four hours.
SpectroDens has a regulated charging management. This means it will power-charge
an empty battery, so the device can be used again after a few minutes. On the other
hand, there is no overcharging of full batteries. You can park the device on the charging console when not in use. This way it is guaranteed to have always an operational
measurement instrument at hand.
Up to 10.000 measurements can be carried out with one battery charge.
Manual TECHKON SpectroDens
How to measure
After switching on SpectroDens, it is instantly ready to measure. Just position the measurement aperture on top of the measurement sample and press shortly with the index finger the green measurement button. Within one second the resulting measurement value will appear on the display of the device.
Please ensure that the device always has a firm stand on a flat surface. There must not
be a distance between the measurement head and the sample where light could pass
through, because this can influence the measurement. On the bottom of the device
there are tracking wheels which allow to drive easily and fast to the measurement
The color of the background material underneath the measurement sample can have
an influence on the measurement result. Different technical standards describe which
backing material to use.
In the printing industry the following procedure is widely used:
 white backing for proofs and
 black backing for prints.
Chapter 1 – How to use TECHKON SpectroDens
Device settings with the display menu
Thanks to the interactive device menu, settings are very easy to adjust. The display
is divided logically into a center and a frame. The center displays the measurement
results. It is framed by interactive “soft keys” and status information displays. Pressing
shortly on one of the arrow buttons will move an active cursor from “soft key” to “soft
key” around the frame. An active “soft key” is indicated by a frame.
By keeping an arrow button pressed, the cursor travels from “soft key” to “soft key” at
a constant speed until the arrow button is depressed again. By pressing the enter button a function behind a “soft key” is selected and a selectable menu appears. Within
such a menu again the navigation is done via the arrow buttons and the selections
are made with the enter button. Some menu items or “soft keys” might be shaded in
appearance and can not be selected, because they are only active in a higher performance package (Advanced or Premium) of SpectroDens.
Pressing the red, round escape button will always bring you one step back in the
menu or will close a menu window. It can be compared to the escape button or undofunction on a PC. It will always bring you back to the measurement mode.
1. Escape button
2. Arrow buttons
3. Enter button
The center of the display shows the
current measurements.
1. Reference measurement
2. Sample measurement
3. Battery and charging status
4. Calibration
5. DELTA-mode (= for comparisons)
6. Average function
7. Color library
8. Device settings
9 Measurement conditions
10.Measurement functions
Manual TECHKON SpectroDens
Menu: Device settings
The “soft key” with the cogwheel symbol opens the window for the device settings.
Within this window you can navigate with the arrow buttons and select with the enter
button. The red escape button brings you back to the measurement mode.
1. The SpectroDens INFO screen shows the
type of device (Basic, Advanced or Premium),
the software- and hardware-version as well as
the serial number and the status of the WLAN
2. Sound will activate an acoustic signal after
each measurement.
3. With activated Automatic Paper White
Calibration SpectroDens will always perform
automatically a paper white calibration when
a measurement on a paper white is made.
We recommend to activate this function only
when the substrate to be printed is often
Chapter 1 – How to use TECHKON SpectroDens
Menu: Device settings
4. In the measurement function Automatic
Density, the device recognizes %-patches,
switches automatically to the display of the
dot area and shows the calculated values.
The automatic switch to %-values can also
be turned off using the device setting %
Measurement Automatic Density to avoid
switching caused by fluctuation. When the
function is deactivated, the device will always
show the density values and the dot area will
not be calculated automatically.
5. SpectroDens can be connected to a WLAN
network to send information via wireless data
transmission to the PC. The WLAN module is
available as optional accessory.
11./12. The functions Density adjustment
(SLOPE) and Absolute white reference values are for the internal device adjustment.
The device is correctly adjusted by the factory and changes of these settings should be
made only in special cases (see page 21 f.: Setting of the Density adjustment (SLOPE)).
13. A Reset puts the device to factory settings.
Attention ! All stored measurement values
and a recently made calibration will be deleted and should therefore be saved on the PC
if necessary, by using the Windows software
SpectroConnect. Only the factory-set calibration values are still valid. A reset can make
sense, if SpectroDens does not work properly.
6. The Display Contrast can be turned darker or brighter.
7. Sets the menu Language of the device.
8./9. All measurement values get a Date- and
Time-stamp. This information will be visible
when the data is transmitted to the PC software SpectroConnect.
10. For the measurement of densities, the Display format CMYK can be selected.
The device can display two or three decimals.
The information in the chosen format is carried out in all density modes.
14. The information of Device Voltages is for
device diagnosis by service personnel.
Manual TECHKON SpectroDens
Menu: Measurement functions
When the “soft key” in the left section of the lower bar is activated, a window opens
where you can select the measurement functions.
The measurement functions listed below are described in detail in chapter 2.
Index of the measurement functions:
1. Automatic Density
2. Densities CMYK
3. Dot Area
4. Dot Gain/Contrast
5. Trapping
6. Printing Curve
7. Printing Plate
8. Slur and Doubling
9. Density Graph
10.ExPresso Mini
11. CIE L*a*b*
12. CIE Color Circle
13. Gray Guide
14.Remission Curve
15. InkCheck 16.CIE XYZ
17. CIE L*C*h* ab
19. CIE L*u*v*
20.CIE L*C*h* uv
21. CIE xyY
22.DIN Lab99
26.Media Wedge
27. Scan
p. 34
p. 37
p. 38
p. 39
p. 40
p. 41
p. 42
p. 44
p. 46
p. 47
p. 50
p. 52
p. 53
p. 58
p. 59
p. 61
p. 61
p. 62
p. 66
p. 66
p. 66
p. 66
p. 67
p. 68
p. 68
p. 69
p. 70
Chapter 1 – How to use TECHKON SpectroDens
Menu: Measurement conditions
When the “soft key” in the right section of the lower bar is activated, a window opens
where you can set the measurement conditions which define the parameters of the
measurement, e. g. which filter will be applied.
The measurement conditions 4. – 16. are described in detail together with the corresponding measurement functions in chapter 2.
1. The device has an integrated Polarizing filter, which can be activated or deactivated by
a push of a button. Polarizing filters compensate for measurement differences between
glossy and non-glossy surfaces (e. g. freshly
printed and dried sheets). The technical standards in Europe recommend the use of such a
filter for densitometric measurements. On the
other hand, colorimetric measurements (e. g.
L*a*b*-measurements) should be taken without a polarizing filter.
By selecting Auto from the menu, this will be
taken into account and there will be automatically the right filter setting.
2. There are two possibilities for defining the
White Reference: Density measurements
usually are referred to the white value of the
paper printed on. Colorimetric measurements
refer to an absolute white reference which is
supplied as a ceramic tile on the charging
By selecting Auto from the menu, there will
always be the right setting according to the
measurement mode which is selected.
3. Depending on the regional technical standards different Density Filter settings are
required. SpectroDens as a powerful spectrophotometer has the great advantage that any
filter specification can be exactly calculated
out of the spectral data. There is no limitation
known from conventional filter based densitometers with fixed filters built in.
In Europe filter ISO E is to be selected as the
standard filter.
Manual TECHKON SpectroDens
Menu: Calibration
Prior to every series of measurements a calibration should be carried out. After a calibration the device is long term stable, however it is recommended to perform a calibration before starting a new measurement task just to be sure the device is working
For density measurements the calibration is carried out on paper white. This will ensure that the density values are in direct ratio to the ink thickness which is applied
on the paper. When there is a change in the paper type, a new calibration has to be
done. Only in a few cases density measurements are referenced to an absolute white
A calibration is as easy to carry out as a measurement: Select the “soft key” Calibration
and place the device with the measurement head on top of a blank area of the paper
sheet. The calibration can be started now by pressing either the enter button or the
green measurement button.
After one second there will appear a window with the message that the calibration
has been done. The device is now ready for measurements. The message window will
disappear with the next measurement.
During the calibration process always take care that the instrument is on a flat, stable
surface and that the material backing the paper is the same as for the following measurements (white, gray or black). When the paper sample is printed on both sides, it
is recommended to use a black backing material in order to avoid mismeasurements
due to color shining through the back of the opaque paper.
Chapter 1 – How to use TECHKON SpectroDens
1.5 Care and maintenance
SpectroDens is a highly-precise optical instrument. It is designed to work in harsh,
industrial environments. However, it should be handled with care. Avoid mechanical
shocks, heat, dusty or humid environments! Keep it always at a safe place, for example
in the carrying case.
The measurement head with the optical system is sealed against dust and dirt. Take
care that the visible, open measurement aperture is always free of dust. You can clean
the measurement aperture with oil-free, clean compressed air and a brush used for
cleaning photographic equipment. For easy cleaning the aperture can be taken off
from the measurement head by unscrewing three screws with a special TORX T6
screwdriver (which is part of the package of a spare aperture set).
Clean the device casing and the display window only with a soft cloth and a nonaggressive plastic cleaner. Never use alcohol or chemically aggressive solvent-based
cleaners which can destroy the surfaces. The same procedure is valid for the white
standard which is integrated in the charging console. If the white standard should be
defective, it has to be replaced completely.
Should the display window show small scratches, these can be polished out with special display polish greases as they are e. g. available for mobile phones and other electronic equipment as well.
The charging contacts at the bottom of the device and on the charging console can
be kept clean with a cotton bud soaked with metal contact spray.
Please do not stick any labels at the bottom of the device. This could lead to faulty
measurements, because the direct contact – which is important for the correct optical
field of depth – might not be maintained
Manual TECHKON SpectroDens
Replacement of the rechargeable battery
The rechargeable Ni-MH battery has a high lifespan. However, after a certain time,
depending how it was used, it will loose its capacity and it will make sense to replace it.
Only use original TECHKON SpectroDens replacement batteries. The use of other batteries is hazardous !
For opening the battery case you will need a Philips screwdriver type 1.
Place the instrument upside down. Put a soft cloth underneath the display to avoid
any scratches.
1. Unscrew the battery cover and remove it.
2. Later when reassembling do not tighten
the screw too much otherwise it might break.
3. Remove the battery and pull the plug.
4. When inserting the new battery, the black
cable has to point into the direction towards
the charging contacts. The plug has to clip
into the socket.
5. When putting the battery back into the
battery casing please take care that the black
cable is placed alongside the battery. The image on the battery case door shows the correct position of the battery.
Chapter 1 – How to use TECHKON SpectroDens
Device adjustment
Should SpectroDens do not work properly, first check, if all instrument settings and
measurement conditions are set correctly. Especially the settings of the Density adjustment (SLOPE) and the Absolute white reference values influence the measurement result.
Setting of the Density adjustment (SLOPE)
With the SLOPE correction values it is possible to adjust SpectroDens to the density
values of other devices.
Activate the “soft key” with the cogwheel icon
and select the menu item Density adjustment (SLOPE).
Select the menu item CYAN.
Enter the Cyan value, you find on the calibration chart. By pressing the arrow buttons the
value can be increased or decreased.
In the same way enter the data given by the
calibration chart for Magenta, Yellow and
Manual TECHKON SpectroDens
Select the menu item Make SLOPE calibration.
Carry out a paper white calibration as described in the device display.
Now measure consecutively the solid patches
of Cyan, Magenta, Yellow and Black.
A correct measurement is indicated by a
green dot behind the respective color.
The SLOPE correction values are shown.
A reset of the SLOPE correction values is done
by activating the menu item Reset SLOPE
coefficients. You reset the device back to its
original factory settings.
Chapter 1 – How to use TECHKON SpectroDens
Setup of the SpectroDens WLAN connection
To be able to use the WLAN function in SpectroDens, a WLAN module has to be
installed. The module is available as accessory from TECHKON. It is a small electronic
board which can be inserted into the instrument easily.
Assembly of the WLAN module
SpectroDens WLAN module
To insert the module the casing has to be
First remove the battery cover at the bottom
side of the device and the battery, then loosen the four screws as shown in the picture.
Lift the upper case carefully and put the two
casing parts side by side on the table.
Manual TECHKON SpectroDens
The slot into which the WLAN module has to
be inserted is located on the main board.
Due to its reverse battery protection the
board cannot be inserted in a wrong way.
When putting the casing together, make sure
the WLAN module fits properly in its compartment.
Tighten carefully all four screws, connect the
battery and close the cover. Now the instrument is ready to use.
Chapter 1 – How to use TECHKON SpectroDens
Configuration of the device
In the upper left corner of the device display
the WLAN symbol will be shown when activated.
The color of the symbol depends on the status.
Gray: Searching
Blue: Connection established
To be able to use the WLAN connection, the
function has to be activated in the settings of
the instrument.
Notice: To save power, it is recommended to
turn off WLAN if not required.
After a successful connection with the software SpectroConnect, the WLAN information
can be checked in the SpectroDens INFO
Manual TECHKON SpectroDens
Setup of the WLAN connection
Start the software SpectroConnect, select SpectroDens settings, turn on the instrument and
connect it with the USB cable to the PC.
The symbol to the right of the serial number indicates the type of connection; in this example
it is an USB connection.
The WLAN settings folder is available after connecting the instrument via USB cable to the PC.
To establish a WLAN connection, please start the WLAN wizard.
Chapter 1 – How to use TECHKON SpectroDens
The WLAN wizard will guide you trough the setup process.
Make sure you have all information about your WLAN network available.
Two types of WLAN connections are possible: Infrastructure and Ad-Hoc.
Infrastructure should be selected if a WLAN network is already installed in the working area.
Ad-Hoc allows a direct connection to a PC using its WLAN module or any WLAN USB stick.
Select Infrastructure and click on the Next button.
Manual TECHKON SpectroDens
The wizard will show all WLAN networks which are available.
Select your network and click on the Next button.
Should your network not be listed you can try again by clicking on Search again using
Please enter the IP-Address, the netmask and the password of your WLAN network in order to
You can enable DHCP if your network is supporting this function. Then a free IP-Address will be
used automatically.
After entering the information, please click on the Next button.
Chapter 1 – How to use TECHKON SpectroDens
SpectroDens is now looking for the WLAN network and if available will establish a connection.
The gray color of the symbol is indicating the search function. Once the WLAN network is found
and the connection is established, the color of the symbol will change to blue.
SpectroDens is now connected to the WLAN network and ready to be used wirelessly.
Manual TECHKON SpectroDens
The settings will be applied and shown in the WLAN settings.
By activating the function Automatically search for WLAN SpectroDens the connection will
be established automatically when used next time.
Now you can disconnect the USB cable.
The connection via WLAN will be indicated by the symbol next to the serial number. The blue
color of the symbol indicates an active connection.
Chapter 1 – How to use TECHKON SpectroDens
Ad-Hoc connection
To establish an Ad-Hoc network select this function during the wizard setup.
The IP-Address, the netmask and the name (SSID) of the network are predefined in this case and
will be shown for your information.
Click on the Next button to continue.
Manual TECHKON SpectroDens
Use the software of your WLAN network card or WLAN USB stick to setup the WLAN connection
to your device
Select the WLAN network named after the serial number of your device.
Confirm the settings and check the connection.
Once the connection with your network card or WLAN USB stick is established you have to go
back and click on Repeat search to connect SpectroConnect to the WLAN network.
A successful connection will be indicated by the blue WLAN symbol.
Continue in the same way as described for the infrastructure network (see p. 30).
Chapter 1 – How to use TECHKON SpectroDens
A device reset sets the device back to factory settings. All calibration data (including
SLOPE values), stored measurement values, reference-, target-, and tolerance-values
will be deleted.
If the reset procedure in the settings window is not possible, a hardware reset has to
be carried out. The battery plug has to be unplugged for a couple of seconds and then
to be connected again. How to unplug the battery is described on page 20.
The warranty for TECHKON products is 24 months starting with the date of purchase.
The invoice is the certificate of warranty. The warranty is invalid if the damage is caused
by inadequate use of the device.
Should a TECHKON product do not work according to the specification, please contact
us before sending us the device. In most cases we can solve the problem over the
phone or via E-mail.
Inspection intervals
TECHKON SpectroDens is maintenance free. We recommend to validate the complete functionality of the devices in a 24 months time interval in the TECHKON
service center.
Please send the device always securely in the carrying case with complete accessories.
For a flat fee the device will be cleaned, checked and re-calibrated. In case a repair or
exchange of components should be necessary we will inform you in advance.
Manual TECHKON SpectroDens
Chapter 2
Description of the measurement functions
2.1 Measurement functions of SpectroDens Basic
Automatic Density
SpectroDens Basic comprises all functions related to density measurement. A very
practical feature is the Automatic Density mode. By a push of the green measurement button the relevant measurement values are displayed. Depending on the type
of measurement patch this can be:
 Solid density D  Dot area in %  Gray balance
In this example the measurement has been
taken on a Cyan patch. SpectroDens recognizes the type of process color and displays
the solid density value of Cyan, which is displayed with the “C” symbol. Values for Cyan
(C), Magenta (M), Yellow (Y) and Black (K = key
color) can be shown.
80% 40% BAL
The density value is a value without a unit.
It corresponds to the amount of ink applied
on the paper surface. The higher the density
value the higher the thickness of the ink layer.
The correct density value is dependent on
the printing parameters (paper, ink, printing
process). Usually, density values are between
1.00 and 2.00.
The second measurement has been taken on
a Magenta patch. The former Cyan measurement still gets displayed. Measurements of a
specific process color will be overwritten as
soon as a new measurement of this specific
color will be made.
80% 40% BAL
BAL 80% 40%
Chapter 2 – Measurement functions
For the display of dot area (or dot percentage) in %, two measurements have to be
made: First the solid density patch and then
the %-patch, which is in this example a 80 %patch. The resulting dot percentage is in this
case 92.6 %; the referring dot gain is 12.6 %:
BAL 80% 40%
1. Measurement 2. Measurement
92.6 % - 80 % = 12.6 %
Should a solid density value be displayed
instead of the desired dot percentage value,
then the density measured first was signifiM
higher than the second one. In this
case we recommend to delete the displayed
value by pressing the red escape button and
to measure again.
When making a measurement on a gray
balance patch, the referring density values
for all four process colors are shown in a bar
graph. The values for Cyan, Magenta and Yellow should be in close range to each other to
ensure a neutral gray balance without a color
80% 40% BAL
A gray balance patch is composed of different
portions of Cyan, Magenta and Yellow. It does
not include black ink.
It is important that the gray balance patch, on
which the measurement is taken, comprises
the right %-values to achieve a neutral gray
when printed correctly. The process standard
ISO 12647 for offset print defines the values as:
C = 50 %,
M = 40 % and
Y = 40 %.
The value for Black indicates how dark the
gray color is. The higher the value for Black
(= K) the darker the sample.
Manual TECHKON SpectroDens
In DELTA Mode (= comparison mode) the
measured values are compared to reference
values. The mode is activated by navigating
to the “soft key” with the triangle symbol and
selecting it.
In the example on the left side a Yellow patch
was measured.
The measured solid density is:
This is 0.08 less than the set reference (= target) density of Y = 1.45.
The measured value is outside the limits of
the set tolerance of ± 0.06. Therefore it is
marked with a cross symbol in the round icon.
Y = 1.37
80% 40% BAL
A checkmark symbol would be shown in case
of a measurement within the tolerance limits.
The setting of reference values and tolerances is done in the menu under the item
measurement conditions.
In the Density Reference Setup up to five
data sets (REF 1 – 5) for reference (= target)
densities can be edited. Reference densities
recommended for the five defined paper
classes are already pre-set.
The tolerances define the lower and upper
limits around the reference values. In this example for Yellow:
1.45 + 0.06 = 1.51
1.45 - 0.06 = 1.39
Chapter 2 – Measurement functions
Densities CMYK
In the measurement function Densities CMYK all four partial densities for Cyan, Magenta, Yellow and Black are displayed.
In this example, a solid Magenta patch was
measured. The solid density is:
M = 1.47
But why are densities for the other colors
shown as well ? Shouldn’t they have a value of
0 ? No. These are the so-called partial densities. No printing ink is 100 % spectrally pure.
There will always be partial colors besides the
actual main color.
This function also makes comparison between measurements and reference values.
In this example the reference value was not
taken from the reference memory but was
measured just before by putting the “soft key”
to Reference:
Patch for reference measurement
1. First select via “soft key” Reference and
make a measurement on a patch which will
be the future reference patch.
2. Now activate via “soft key“ Sample and
make a measurement on a sample patch. A
triangle symbol in front of the measurement
value indicates that delta values (difference
between reference and sample) are shown.
Future sample measurements will be compared to the once measured reference values
as well.
3. Now activate the DELTA Mode by selecting the triangle symbol.
Patch for sample measurement
The function Densities CMYK is especially
suitable for the measurement of multicolored
composed CMYK colors, e. g. in logos, to find
out the reason for possible color shifts.
For information about the ∆Dmax-function
see page 46.
Manual TECHKON SpectroDens
Dot Area
For the function Dot Area (= dot percentage) two measurements have to be carried
out. First a measurement on a solid patch and then a measurement on a %-patch
(= screen patch). The dot area value is calculated with the Murray-Davies formula.
1. First place the measurement head above
a solid patch and start the measurement by
pressing the green button. The solid density
value will be displayed.
2. Now make a second measurement on a
%-patch and the dot area in % will be shown.
In this case a measurement has been taken on
a 40 %-patch. The resulting dot gain can be
easily calculated:
59 % - 40 % = 19 %
The dot gain value gives the information
to what degree a point is enlarged (or decreased) during each process step of the reproduction process chain.
80% 40% BAL
The double arrow on the left side of the device display indicates which measurement
has to be done next.
Should several dot area values refer to the
same solid density, this value has to be measured only once and can be saved for consecutive %-measurements. After a solid density measurement, just keep the enter button
pushed for approximately 3 seconds until the
density value is framed. Now an unlimited
number of %-measurements can be made.
Deactivating is done by keeping the enter
button pressed again.
Chapter 2 – Measurement functions
Dot Gain / Contrast
The function Dot Gain / Contrast is closely related to the previously described function of dot area. Here also, first a solid density measurement is carried out and then
%-measurements follow.
In the lower part of the device display there is
shown which patch has to be measured next.
In this case there just has been measured a
solid density patch with a density of 1.84.
The double arrow points to the 80 meaning
an 80 %-patch has to be measured next.
After the last %-measurement has been done
(in this case the 80 %-patch) additionally to
the Dot Gain value the Printing Contrast
will be calculated and displayed.
The round escape button will always lead
back to the previous step in case a wrong
measurement has been made.
80% 40% BAL
2. 3.
The setting for the %-patches to be measured
is done in Dot Gain Setup.
Up to three percentage values can be edited.
The TECHKON TCS print control strips include
two different %-patches; 80 % and 40 %.
Manual TECHKON SpectroDens
With the feature Trapping there can be checked, how good two layers of ink which
are printed over each other represent the resulting mixed color.
Three measurements are necessary: Two
measurements on each of the two separate
process colors and finally one measurement
on the resulting overprinted patch.
Here in this example first Cyan and second
Magenta has been measured. The final measurement is done on a blue patch as the
overprint of Cyan and Magenta. The trapping
value is 73.2 %. The higher the value the better the overprint of two colors.
1. 2.
Additionally to the trapping value in %
there are the densities for the separate color
patches displayed. The densities are always
displayed with the filter channel of the second printed ink; in this case Magenta. This
explains why the density value for the first
printed ink Cyan is so low. SpectroDens will
recognize automatically the order of colors as
they are printed. Switching the first and second measurement therefore will lead to the
same result.
80% 40% BAL
There are no standard values for the trapping measurement. The values which can
be obtained depend on the printing process and particularly on the type of ink and
paper used. Typical values for standardized print with Paper Class 1 (glossy, coated) are:
C+M > 60 %, M+Y > 72 % and C+Y > 85 %.
SpectroDens offers extended trapping calculation according to Professor Ritz and Felix Brunner, which ensure a better comparison between C+M, M+Y and C+Y measurements. An alternative determination how well two separate colors overprint can be
checked with a colorimetric function, such as the L*C*h*-feature, where the L*- and
C*-values give the information of the printable gamut.
Chapter 2 – Measurement functions
Printing Curve
The measurement function Printing Curve displays a complete transfer curve, which
describes how screen dots (and tonal values) are transferred during the several process steps of the reproduction process.
First, make the required settings in the Printing Curve Setup:
1. Tolerance range can be set according to
standard values (in this case the ISO Paper
Class 1/2 was selected)
2. Dot (screen) frequency (only relevant for
the display of tolerance values)
3. Increments of the wedge to be measured,
e. g. in 10 % steps
In the first step a 100 %-(solid) patch is measured. SpectroDens recognizes automatically
the color and displays the solid density. In this
case D = 1.38 for Cyan.
The double arrow in the upper left corner indicates that the next patch to be measured
will be a 90 %-patch. Now all other pre-set
%-patches can be measured on the measurement wedge.
Step wedges with separation bars (as shown)
can be measured by scanning. Just keep the
green start-button pressed during the whole
scanning procedure.
Manual TECHKON SpectroDens
Now the corresponding current dot area is
indicated in the lower right section of the display. In this case: 97.0 % dot area at 90 % dot
percentage results in a dot gain of 7.0 %.
The shaded area close to the curve shows the
tolerance range. The curve should be within
this area.
A wrong measurement can be easily deleted
by the red escape button and the device will
be ready again to read the patch correctly.
When using the scan function we recommend to use a patch width of 5 x 5 mm (min.
4 x 4 mm) with the standard aperture and a
patch width of 4 x 4 mm (min. 3 x 3 mm) with
the exchangeable 1,5 mm aperture.
Printing Plate
Beside energy and focus of the laser, dot gain is the most important information which
has to be checked in plate exposure. Special plate measuring instruments working
with video analysis have been developed for this application; for example TECHKON
SpectroPlate. Compared to densitometers and colorimeters they offer big advantages.
Nevertheless it is basically possible to make measurements with a densitometer on a
printing plate. In doing so one should regard the following: Variations in the coating of
the printing plates may result in strong influences on the measurements, especially in
the crucial range under 10 %. Variations of 0.02 D can cause errors up to 6 %.
The values measured with a densitometer do not correspond with the geometric dot
area, due to the fact that the densitometric measurement process is subject to optical
influences, which increase the measurement value. Therefore densitometers measure
always a higher value than video analysis devices. But the measurement value of the
densitometer can be taken as a reference value for the tonal value adjustment.
For the measurement of the zero point (1.), the solid patch (2.) and the screen patch
(3.) you should select areas on the printing plate which are located as close as possible
to each other.
Chapter 2 – Measurement functions
The measurement feature Printing Plate measurement allows reading values directly
on printing plates. The process is comparable to reading on printed paper.
Before taking a measurement it is important, that the rubber coating is washed off
the printing plate, because otherwise light gets lost and the measurement result will
be distorted. In addition a correction factor, the so-called Yule-Nielsen factor, can be
set according to the material characteristics of the printing plate. Usually the plate
manufacturer will furnish the information about the factor for the different plate types.
The setting of the Yule-Nielsen factor is done
in the settings window of the measurement
If there is no information about the factor
available from the documentation furnished
with the plates, we recommend to keep the
value in a neutral range at n = 1.00.
The measurement is performed as known
from measuring on printed paper:
1. First, calibrate on a light, not imaged area
of the printing plate, as it would be a paper
white calibration.
2. Now measure a dark, 100 %-imaged patch.
SpectroDens will select one of the four CMYK
channels where the contrast signal is highest
depending on the color shade of the plate. In
this case the Cyan channel gave the highest
signal, because the plate is blue/violet.
3. Now the measurement on a %-patch is
carried out and displayed. Additional %-measurements can be easily made. It is not necessary to measure the solid density again, because it is already saved, which is indicated by
the frame around the value.
Manual TECHKON SpectroDens
Slur and Doubling
With the measurement function Slur and Doubling printing deficiencies, caused by
inexact, geometrical transfer of the image from the plate to the paper can by evaluated.
Slurring means that the printed dot deforms from the transfer of the printing plate to
the rubber blanket or from the rubber blanket to the paper. The effect of doubling will
be present when a printed dot is transferred a second time with less intensity geometrically slightly offset. This ghost image is caused by ink being re-transferred to the
rubber blanket which should have stayed completely on the printed paper.
To make the slur and doubling measurement possible, it is necessary to have on the
color bar vertical and horizontal lined patches with identical line thickness as it is the
case with the print control strip TECHKON TCS.
Three measurements have to be carried out:
1. The first measurement on the solid patch;
in this case of Magenta.
2. The second measurement on the horizontal lined patch of the same process color.
After the measurement of the horizontal lined
patch the dot area of the patch is calculated
and stored (see the following figure).
Chapter 2 – Measurement functions
3. The third measurement on a vertical lined
patch. After the measurement of the vertical
lines again the dot area of the patch is calculated and stored (see the following figure).
As a result the so-called slur/doubling factor
in % is displayed.
0 % is the best achievable factor, meaning the dot transfer is perfect, the horizontal
and vertical lines of the measurement patches have the same thickness and that neither slur nor doubling effects are present. Values up around 5 % still are acceptable.
%-values higher than 10 % indicate significant geometrical errors in print due to slur or
doubling effects. There are no standard values for the maximum allowable %-factor.
Manual TECHKON SpectroDens
Density Graph
The function Density Graph enables the exact display of density values for any spot
color. Usually the standards define density filter characteristics only for the process
colors Cyan, Magenta, Yellow and Black. Thanks to the spectral measurement of
SpectroDens, a virtual spectral density characteristic for any spot color can be obtained. The great advantage is that the process control of spot colors can now be
as easily achieved as known from the four process colors.
In the following example a measurement
has been made on a blue spot color.
The density graph is derived from the remission spectrum and represents the density spectrum for wavelengths from 400 to
700 nm. The peak of the curve displays where
the spectral density value has to be taken.
In this case the spectral density for the blue
color is D = 1.57 at a peak wavelength of
580 nm.
Only spectral densities relating to the same
peak wavelength (Dmax) can be compared.
SpectroDens displays the spectral density
automatically as well in the Densities CMYK
measurement mode.
The density values for CMYK show to what extent the spot color can as well be registered
by the CMYK-color related standard density
Here in this case, the blue color is close to a
Cyan, therefore the density value in the Cyan
channel is quite high.
Chapter 2 – Measurement functions
ExPresso Mini
The measurement function ExPresso Mini allows the fast control of the printing quality during the printing process. The last ten consecutive measurements of a printing
color can be taken on a print control strip of a printed sheet for the ink zone control. In
addition ExPresso Mini provides the opportunity to get an overview of the stability of
the print run, by measuring the last ten printed sheets.
Advanced functions for the fast and comprehensive control of the printing quality
during the printing process features the software TECHKON ExPresso 3.0 in connection with the automatic measurement system TECHKON SpectroDrive.
ExPresso Mini can display the last ten measurements per color.
When, after the tenth measurement, the display is filled up with measurement values, the
already existing values shift with every new
measurement one step to the left, and the
first value falls away.
The reference line marks the average value of
all measurements.
The tolerance area is defined with ± 0.10 density.
The average value is recalculated after every
Manual TECHKON SpectroDens
In ExPresso Mini the Delta Mode can be activated.
Taken measurements will then be compared
to reference densities, pre-set in the Density
Reference Setup.
The reference data and the result will be displayed. The reference line is always the reference value and the corresponding tolerance.
The figure describes the situation inside and
outside of the tolerance and the situation
outside of the graphic space.
Chapter 2 – Measurement functions
The measurement conditions M0 – M3 according to ISO
Many types of paper contain optical brighteners or pigments to improve the visual
performance of the paper. The brighteners and pigments are used to make the paper
look brighter and whiter. But for the accurate color adjustment they are quite a challenge, because the type of ambient light influences the color perception in most cases
to a large extent. To be able to evaluate these printing substrates precisely when measuring, new standards have been defined concerning the measurement conditions.
The following measurement conditions are selectable in the measurement parameter
menu of the SpectroDens color measurement device.
Measurement condition M0 is used when the printing substrate contains no or only
little optical brighteners. The measurement light corresponds to the standard illumination type A and the UV component of the source, which activates the optical brighteners, is not specified. Almost every color measurement device in the graphic industries
works so far with this measurement condition. This measurement condition should
also be used, when measurement values have to be compliant to older devices.
Measurement condition M1 was defined to activate optical brighteners with a specified component of UV light, to be able to evaluate the effect of the brighteners more
precisely. The measurement light conforms to the illumination type D 50 with a specified UV component.
Measurement condition M2 describes the measurement without UV light. In older
devices this measurement condition was realized using an UV-Cut filter. The comparison of the measurement value M1 to M2 shows clearly how strong the effect of optical
brighteners is.
Measurement condition M3 is mainly used for densitometric measurements and
only to a less extent for colorimetric measurements. It describes the use of polarization
filters which reduce surface reflections to minimize measurement deviations between
wet and dry printing sheets.
Manual TECHKON SpectroDens
2.2 Additional functions of SpectroDens Advanced
CIE L*a*b*
The previously described measurement functions all were based on densitometry.
Thanks to the spectral performance of SpectroDens it is possible to calculate and display colorimetric values as well. Measurements in colorimetry modes have the advantage of an absolute description of color based on characteristic values.
The thematic separation between densitometric and colorimetric functions is displayed
by a dotted line within the measurement
function window. CIE stands for the international color institute Commission Internationale de l’Eclairage which publishes the standards for colorimetry.
L* = 100
+ b*
- a*
L* = 50
+ a*
- b*
The most popular color system in the printing
industry is the CIE L*a*b* color space. Every
color is precisely described by three values:
The L*-value stands for the luminance and can
have values between 0 (a theoretical, absolute Black) and 100 (a theoretical, ideal White).
The a*-value describes the color value on the
Green/Red-axis (- a*: Green, + a*: Red) and the
b*-value the color value on the Blue/Yellowaxis (- b*: Blue, + b*: Yellow).
L* = 0
Colorimetric L*a*b*-measurement on a blue
sample. The blue color has a low luminance
of L = 28.71 and a low portion of Red (a < 15).
Chapter 2 – Measurement functions
In colorimetry the white reference is absolute in contrary to densitometry where the
white is usually referenced to paper white. Before making colorimetric measurements,
an absolute white calibration has to be carried out by placing SpectroDens on the
charging console and calibrating on the round, white ceramic standard.
Colorimetric measurements can only be compared when the measurement conditions are
the same:
Polfilter: off
White reference: Absolute
Illuminant: D50
Observer: 2°
When selecting Auto in the polarizing filter
setting, there will be automatically the polarizing filter inactivated when making colorimetric measurements.
The color distance ∆E* describes how close two different colors match. A value of 0
means that they are identical. ∆E*-color differences in the range of 5 result in considerably perceptible deviations when reference and sample are close together and
observed at the same time.
For measurements of the color distance ∆E*
of two different colors, activate the DELTA
Mode first by selecting the “soft key” with the
triangle icon.
Color comparison:
Now two measurements are made:
1. Reference measurement
2. Sample measurement
The color distance ∆E* is displayed with two
digits. Additionally the components ∆L*, ∆a*
and ∆b* can be seen.
Manual TECHKON SpectroDens
CIE Color Circle
The function CIE Color Circle shows the L*a*b*-color values as well. Additionally there
is a graphic display and a color is shown as a spot within the color circle.
The measurement function CIE Color Circle,
(as well as CIE XYZ and Remission Curve),
can be operated in absolute mode with
DELTA ON or in comparison mode with DELTA
Chapter 2 – Measurement functions
The measurement function GrayGuide supports the G7™ calibration of presses and
proofs according to the method developed by the IDEAlliance (International Digital
Enterprise Alliance).
The GrayGuide mode can be selected out of
the list of measurement functions.
In the pop-up window of the measurement
conditions the item Gray Guide Setup can
be chosen. Now target values can be edited
and printing conditions can be selected.
Edit the target values for SC, HR and HC for
K and CMY. For Auto Set a*/b* use half a*/b*
values of measured paper as target value.
For the comparison to the right ISO reference
values the used paper type and backing must
be selected.
Manual TECHKON SpectroDens
In order to take correct measurements an absolute white calibration must be performed
and will be confirmed in the display when
A measurement of the paper white is necessary for correct calculations.
Now the instrument is ready to measure. The
selected paper type and backing are indicated in the display.
When measuring solid inks the values are
compared to the ISO reference values. The
∆E*-value is indicated and the symbol shows
if the value is within or out of tolerance.
The recognized color and L*a*b*-value of the
measurement are displayed as well.
The selected paper type and backing type
are always indicated.
Chapter 2 – Measurement functions
The ∆E*-value is calculated as long as the difference is in a reasonable range.
If the difference exceeds a limit, then only the
measured density value is displayed without
This procedure works for all CMYK colors.
The selected paper type and backing type
are always indicated.
The color detection works for trapping patches as well. The recognized type of patch is displayed in the printing order of the two colors.
The measured value is compared with the
ISO reference and the difference is displayed
as ∆E*.
If paper white or any other undefined patch
is measured then all four densities are displayed simultaneously.
Manual TECHKON SpectroDens
If a gray balance patch is measured all four
densities are displayed in a bar chart.
If the value is close to the SC_cmy “neutral
density” target it will be displayed with recommended adjustments.
SC stands for “Shadow Contrast”.
The HR_cmy is detected as well. The recommended adjustments are shown by the arrows and numbers.
HR stands for “Highlight Range”.
As soon as the value is close to the HC_cmy
“neutral density” target it is recognized and
HC stands for “Highlight Contrast”.
The recommended density adjustments for
black patches of SC_k, HR_k and HC_k are
displayed in the same way.
Chapter 2 – Measurement functions
1. Detected color
2. Measured density
3. ∆E*-difference compared to ISO reference
4. Indication in/out tolerance
5. Measured L*a*b*-value
6. ISO paper type and type of backing
1. Detected color
2. Direction of adjustment
3. Recommended adjustment
4. Detected patch type
5. Measured value
6. ISO paper type and type of backing
1. Color
2. Recommended adjustment
3. Adjustment as bar graph
4. Direction of adjustment
5. Detected patch type
6. Differences of HR_cmy and a*b* values
compared to target values
7. ISO paper type and type of backing
1. Indicator for neutral density ND CMY
2. Direction of adjustment (+/-)
3. Recommended adjustment
4. Detected patch type
5. Measured value
6. ISO paper type and type of backing
Manual TECHKON SpectroDens
Remission Curve
The function Remission Curve offers the complete spectral graph.
Remission values are shown in 10 nanometer
steps in the spectral range of 400 to 700 nm.
A remission value has a range between 0 (no
remission, absolute darkness) and 1 (total remission of the emitted light).
The remission curve is the most exact and total description of a color.
Chapter 2 – Measurement functions
The measurement function InkCheck combines in a very easy way the advantages of
colorimetry with the familiar densitometry. Thanks to this helpful function, working
with the process standard ISO 12647 is simply achieved. The colorimetric deviations
are reported and additionally recommendations for amounts of ink supplied in terms
of density values are given.
In contrast to the measurement function ISO-Check the measurement function InkCheck is not only able to check the CMYK print ink, but also spot colors, provided that
the appropriate spot colors were chosen as references in advance. In addition to the
color books which are included in the contents of delivery, for example the HKS-color
books, you can create your own color books for spot colors and use them as a reference.
The recommendations for amounts of ink supplied in terms of density values for spot
colors are based on CIE L*a*b* measurements.
First, a color book which holds the reference
color data has to be selected in the reference
menu. The reference values for the 5 paper
classes defined in the ISO standard are pre-set
in the device memory. The data set “Proof” is
for measurements on white backing and the
data set “Print” for measurements on black
Notice: If they can not be found in the device
memory, they can be uploaded with the Windows software SpectroConnect.
First, a calibration on paper white has to be
made. Position the device on the paper white
and confirm the request to measure the paper white by pressing the green measurement button.
Manual TECHKON SpectroDens
Now the device is ready for measurements on
solid color patches. In this case a yellow patch
was measured.
Density trend: It is recommended to increase the density by 0.16.
Color deviation: The color distance to the
reference is 6.1 ∆E*. After following the density trend it can be as low as approx. 1.6 ∆E*.
A closer color match will be limited because
the paper and ink characteristics do not allow
to get closer to the reference standard.
Please note that the density values are obtained without the polarizing filter activated
and therefore are lower as values obtained
with polarizing filter. Please ensure that the
right measurement conditions are set.
Chapter 2 – Measurement functions
The CIE XYZ will display standard color values.
XYZ standard color values are (beside L*a*b*values) a different way of describing the color
values. They are not as practical to use and
therefore not as widely used in the printing
CIE L*C*h* ab
The CIE L*C*h* ab display is closely related to the CIE L*a*b* display (see p. 50).
Instead of Cartesian coordinates, polar coordinates are used. The value C* stands for
Chroma and the angular value h* for hue.
L*C*h*-values are very popular, because they
describe colors in a simple way. The further
the color is located from the center of the
color circle, the more saturated and vivid it
Manual TECHKON SpectroDens
2.3 Additional functions of SpectroDens Premium
The measurement function ISO-Check provides the fast check of a print with regard
to the compliance with the ISO standard values ISO 12647-2. The L*a*b*-values, the dot
gain and the dot spread of the printing inks CMYK are documented.
First the ISO Check Setup in the menu section of the measurement conditions has to
be set.
You can edit the paper type, the dot frequency and two dot values.
In accordance to ISO 12647-2 the dot frequency shall be set to 150 lpi (60 L/cm) and the dot
values of 80 % (75 %) and 40 % (50 %) shall
be used.
In the next step the paper white must be
measured. When the message for measuring
the paper white is displayed, please confirm it
by pressing the green measurement button.
When the ∆L*a*b*-values are marked with
checkmarks, the paper white is in accordance
with the ISO-standards.
A special ISO/PSO control strip (as shown) can
also be measured by scanning. Just keep the
green start-button pressed during the whole
scanning procedure.
Chapter 2 – Measurement functions
When the solid density is measured, the compliance with the tolerances is checked.
In this example the measurement has been
taken on a black solid patch.
At the same time the recommendation how
to adjust the density is calculated.
The smallest possible ∆E*-value is calculated
in advance.
The measurement function ISO-Check recognizes, whether the given tolerances can be
achieved with the set of print ink in use. If this
is not the case, another set of print ink must
be used.
Manual TECHKON SpectroDens
After the measurement of the solid patch, you
can measure the %-patch, which you have
defined in the setup.
The dot gain is checked in regard to its conformity to the ISO-standards.
Concerning the midtone the spread will be
displayed additionally (CMY).
The deviation of the colors CMY is allowed to
reach ± 4 % in the middle-tone of 40 % per
ink .
But to avoid that the gray balance is disturbed
too much, the spread limits the permitted difference between the highest and the lowest
tonal value to 5 %.
Chapter 2 – Measurement functions
By measuring the trapping only the variation
from the reference will be displayed.
The ISO standards define no tolerances for
trapping, only informative reference values
are given.
But it is recommended, not to exceed a ∆E*value of 10 in the secondary colors, which
corresponds with the sum of the permitted
∆E*-deviations of the primary colors.
Instead of scanning the TECHKON strip the
measurement function ISO-Check can also
capture the ECI/bvdm Gray Control Strip version tvi 10 (i1) and (M i1).
When using the scan function we recommend to use a patch width of 5 x 5 mm (min.
4 x 4 mm) with the standard aperture and a
patch width of 4 x 4 mm (min. 3 x 3 mm) with
the exchangeable 1,5 mm aperture.
tvi 10 • v2
ECI/bvdm tvi 10 (i1) • 6 mm • Control strip with tone values in 10 percent steps for print process control in accordance with ISO 12647 • •
GrayCon M i1 • v2
cmy 70
k 70
cmy 50
k 50
cmy 30
k 30
cmy 70
k 70
cmy 50
k 50
cmy 30
ECI/bvdm Gray Control Strip (M i1) • FOGRA30 • ISO 12647-2 gray balance condition ‘CIELAB black ink’ • Offset on uncoated yellowish paper (PT 5) • ISO 12647-2:2004/Amd 1 • Reference FOGRA30.txt (www.fog
ECI Gray Control Strips: ECI/bvdm tvi 10 (i1) and M i1
Manual TECHKON SpectroDens
CIE L*u*v*, CIE L*C*h* uv, CIE xyY and DIN Lab99
The Premium-version of SpectroDens enables the display of additional color spaces,
which might be used mainly in industries outside printing:
CIE L*u*v*, CIE L*C*h* uv, CIE xyY and DIN Lab99.
Different formulas for calculating the color
distance ∆E* can be selected as well. The
Euclidean color distance ∆E* a*b* is the most
widely used, although it is criticized that for
certain areas in the color space the visual perception of color distances does not match the
∆E* a*b* color distance accordingly.
Chapter 2 – Measurement functions
Metamerism is the visual phenomenon that two colors match under certain light conditions and differ under different light conditions.
Colorimetry offers the possibility to detect this effect by measuring the color distance
between the two color samples under two exactly defined light sources. The result of
this operation is the Metamerism-Index.
For the determination of the MetamerismIndex there are two measurements to be
1. A reference measurement, which refers to
illuminant condition D65.
2. A sample measurement on the sample
As a result the color distances in ∆E* a*b* for
illuminant conditions A, C and D50 are shown.
Identical color impression under light condition I:
Color deviation under light condition 2
caused by metamerism:
Manual TECHKON SpectroDens
Whiteness / Yellowness
Whiteness- and Yellowness-indices are quality parameters important for the paper
industry. SpectroDens Premium will display the whiteness index according to CIE and
the yellowness index according to American standard ASTM D 1925.
Whiteness index:
Values are usually between 90 and 120 for
“white” paper. The higher the value, the “whiter” (= the brighter) the paper. Artificial optical brighteners in the paper will lead to high
values as well.
Yellowness index:
Positive value: the paper has a yellow cast
Negative value: the paper has a blue cast
The PASS / FAIL function shows at a glance if a measured sample is in or out a set
tolerance compared to a reference value.
First, set the allowable limits of the ∆E*-tolerance.
Select in the menu section of the measurement conditions the item PASS / FAIL tolerance and edit the desired tolerance value by
pressing the arrow buttons.
Every sample measurement is compared to
the reference.
If the color distance is within the set tolerance
(in this case 2.72 < 3.0), PASS will be displayed.
For out of tolerance measurements, accordingly FAIL will be shown accompanied by an
acoustic signal of three short beeps.
Chapter 2 – Measurement functions
Media Wedge
The Ugra / Fogra Media Wedge CMYK is a control element for checking the color
consistency of digital proof systems issued by the printing institute Fogra. This practical function is for measuring and analyzing the patches of this control element.
First, a Color book has to be selected which
contains the Fogra reference data. If not
found in the device memory, the color book
which is valid for the paper class to be measured, can be uploaded from the Windows
software SpectroConnect.
Additional settings have to be made in the
Media Wedge Setup window. The settings
for ∆E*-tolerances are according to Fogra
By activating Automatic Measurement the
device will make consecutive measurements
automatically with Measurement Interval
to be set. Starting and stopping a measurement series is done by pressing the green
measurement button.
The reading of the media wedge is from left
to right and from first to second row. The
measurement begins with patch A1, then A2,
etc.. Wrong measurements can be corrected
by pressing the red escape button and remeasuring.
After all measurements have been performed,
the total result will be displayed.
Media Wedges with separation bars can also
be measured by scanning. Just keep the
green start-button pressed during the whole
scanning procedure.
SpectroDens recognizes the version 2 as well
as the version 3 of the media wedge by the
different number of reference values. The
Windows software SpectroConnect allows
to analyze the measured data in detail and to
print a report (see p. 84 f.).
Manual TECHKON SpectroDens
The measurement function Scan provides the scanning of individual control elements, as long as the control element features a measurement patch alignment of 50
patches maximum with sufficient contrast or with contrast lines between the patches.
The scanning procedure is very easy. Choose the measurement function SCAN in the
device menu. Then place the measurement device on the print control strip. Take care
that the measurement aperture is positioned on the first measurement patch (= start
position) and that the device edge is aligned to the print control strip (see picture).
Now press and hold the measurement button, move the device in constant speed
along the print control strip until you reach the last patch to be measured (= stop
position) and release the measurement button. If the measurement was carried out
successfully a short acoustic signal can be heard and all color patches are displayed in
the device. Using the SpectroConnect Export module measurement data can finally
be exported in any other Windows application e. g. Microsoft Excel™, Word™ or other
programs which can handle color data, e.g. a RIP calibration software.
Examples of control elements which can be scanned:
tvi 10 • v2
ECI/bvdm tvi 10 (i1) • 6 mm • Control strip with tone values in 10 percent steps for print process control in accordance with ISO 12647 • •
GrayCon M i1 • v2
cmy 70
k 70
cmy 50
k 50
cmy 30
k 30
cmy 70
k 70
cmy 50
k 50
cmy 30
ECI/bvdm Gray Control Strip (M i1) • FOGRA30 • ISO 12647-2 gray balance condition ‘CIELAB black ink’ • Offset on uncoated yellowish paper (PT 5) • ISO 12647-2:2004/Amd 1 • Reference FOGRA30.txt (www.fog
ECI Gray Control Strips: ECI/bvdm tvi 10 (i1) and M i1
TECHKON ISO-Check element
Chapter 2 – Measurement functions
Average values
From a series of single measurements Average values can be calculated and displayed. This function may be used when the surface of the sample has no even distribution of color.
By selecting the “soft key” with the average
symbol a pop-up window will appear where
Average measurement can be set, started
and cancelled.
Here the Number of measurements to be
calculated to one average value is set. The
maximum number of single measurements
is 9.
Now activate Start Average measurement.
The central window indicates how many single measurements have been taken.
After the last single measurement has been
taken, the resulting average value will be
displayed and the procedure can start again
from the beginning.
Activating the menu item Stop Average
measurement you quit this measurement
Manual TECHKON SpectroDens
2.4 Storage of measurement values
The versions SpectroDens Advanced and Premium include a Color library. This is a
digital memory for storing color values, which can be compared or exchanged with
the Windows software SpectroConnect.
There are three different sections where color values can be stored:
Reference memory for up to 300 reference values
Sample memory for up to 1200 sample values
Color book memory for up to 20 color books with a total number of 3000
reference values
Reference memory
To access the Reference memory, you have to select Reference in the display. A
memory capacity for 300 references is at your disposal. After the 300th color value is
stored, the message indicates that the memory is full.
By pressing the enter button with the device
in Reference mode a pop-up window opens.
Within the window navigation is done with
the arrow keys.
1. With Save the last reference measurement
is stored.
2. Select shows a list of stored color values.
Within the list, values can be selected and displayed by using the arrow- and enter-buttons.
Chapter 2 – Measurement functions
3. By activating Save automatically all future reference measurements will be stored
4. By activating Search automatically Reference Mem the closest matching reference
color when making a sample measurement
will be displayed. This feature is active in the
sample mode with DELTA Mode on.
5. Delete will remove selected color values
from the list.
6. Delete all will remove all values in the list.
Sample memory
The Sample memory has almost the same functions as the reference memory. Here
up to 1200 sample color values can be stored. However the sample memory is a ring
memory, i. e. maximum 1200 samples can be stored before the first sample will be
overwritten by a new measurement.
The pop-up window opens by pressing the enter button with the device in Sample
Manual TECHKON SpectroDens
Color book memory
Additionally to storing reference and sample color values, complete Color books can
be managed. A color book is a folder which can hold up to 3000 single color values.
An example are the HKS® spot color collections which are included in SpectroDens
with the software package SpectroConnect. New color books can easily be edited
and transferred into the device. Up to 20 color books can be stored in SpectroDens;
there is no limitation of storing color books in the Windows software SpectroConnect.
The “soft key” with the color book symbol
opens the window for the settings of the
color book memory.
1. Here a Color book is selected from the list.
2. With Load Reference from Color book a
single color value from a color book is loaded
into the reference memory.
3. Search for closest color determines the
closest color match in a color book compared
to a sample value.
Chapter 3 – Software SpectroConnect
Chapter 3
How to use the Windows software SpectroConnect
3.1 Software description
The supplied Windows software
SpectroConnect allows to transfer
measurement data to the PC and to
make device specific settings via the
PC. The measurement values can be displayed on the computer monitor. Color information is displayed, colors can be compared and data can be exported into other
software applications, e. g. Microsoft Excel™.
When using SpectroDens Basic the device has to be connected via the USB cable to
the PC when working with SpectroConnect. When performing a measurement with
the device, the value will be displayed immediately on the computer screen.
The models SpectroDens Advanced and Premium have an internal memory for up
to 300 reference values, 1200 sample values and 20 “digital” color books, which can
contain up to 3000 color values. When connecting the device to the PC via the USB
cable, all stored values will be uploaded to the software and displayed on the computer screen. Of course, the device can be operated as usual when connected to the PC.
The software requires a computer with a free USB port and a completely installed
Microsoft Windows XP, Vista, 7 or 8 operating system.
3.2 Installation
It is important, to carry out the following steps in the right order, to make sure that the
USB device driver will be installed properly.
1. Make sure that the device is not connected to the PC.
Insert the SpectroConnect CD into the CD drive of the running computer.
You will find the CD at the back of this manual.
2.The installation routine will start automatically.
Follow the steps of the installation, until it is completed.
3.Now, after the installation was finished successfully you can connect the device
with the USB cable to the computer.
Manual TECHKON SpectroDens
3.3 Overview
Software symbol
The application will be installed in the
Windows program files section in the
After starting the program the software module Compare Colors will appear. Like all
the SpectroConnect software modules it is divided into four logical segments:
On the left side you see the memory content of the connected device, in the center
the active program module, on the right side the color library which is stored on the
PC and in the section at the bottom a bar which lists all available and selectable program modules.
1. The menu bar includes functions known
from standard Windows applications. They
comprise: New, Open, Save, Print and Quit.
2. The window Samples shows samples
which are stored in the device. Only in SpectroDens Advanced and Premium available.
3. The window References shows stored references. Only in SpectroDens Advanced and
Premium available.
4. The window Color books displays the color books which are stored in the color library
of the device. Per Drag and Drop you can
copy references and complete color books
from here.
5. In this section, the appropriate measurement device can be selected.
6. Window of the active program module
7. This bar shows the list of available program
modules. They can be selected from this bar
directly via mouse click and the application
will appear in the middle of the display.
After launching SpectroConnect it is pre-set
to display the module Compare colors.
Chapter 3 – Software SpectroConnect
3.4 Software module: SpectroDens settings
In this module device specific settings can be made.
1. SpectroDens Info: All settings, which can be made at the device can also be made with
this software feature.
2. Lock device functions: Device functions can be locked and unlocked with this feature.
Locked functions will appear in shaded gray on the LCD display.
3. Device update:
New device software can be uploaded into the device. There are
two different types of files to upload:
 Device update: loads the new version of device software
 Device upgrade:upgrades to SpectroDens Advanced or Premium
(has to be purchased)
4. Device screenshot:
This shows the device display on the computer screen.
All measurement buttons can be remotely operated by the mouse
pointer. The screenshot can be saved. This is a very useful feature for
product trainings.
5. WLAN settings
Window for the configuration of the WLAN connection (see p. 23 ff.)
Manual TECHKON SpectroDens
3.5 Device update and device upgrade
By the application of this module SpectroDens can be loaded with a new internal
firmware which is selected by Device update or SpectroDens can be expanded in
functionality by Device upgrade.
The SpectroDens Basic model can be extended via data upload to Advanced- or
Premium- functionality without the need to send the instrument to the TECHKON
service center. Of course, the same procedure applies for upgrades from Advanced
to Premium.
The procedure is explained in the program window:
Chapter 3 – Software SpectroConnect
3.6 Software module: Export
Measurement data can be exported in any other Windows application e. g. Microsoft
Excel™, Word™ or other programs which can handle color data, e.g. a RIP calibration
SpectroDens works like the keyboard: Pressing the measurement button will place the
measurement value automatically at the location where the cursor is.
1. Here is defined, which data will be transmitted, how it will be formatted and what
type of spacing between the measurement
data will be. All the settings can be saved and
recalled later.
2. The Export window can also be used for
testing data transmissions.
This example shows the transfer of CMYK
density values.
Manual TECHKON SpectroDens
3.7 Software module: ColorCatcher
The program module ColorCatcher is available in the models SpectroDens Advanced
and Premium. Based on a L*a*b*-measurement and referring to selected ICC profiles
this program module displays the conversion into the color models L*C*h*, RGB and
CMYK. Furthermore an automatic search for the closest matching color of a pre-set or
self created color book is carried out. The lower part of the module window informs
you about the exact color deviations between the sample and the recommended
color of the color book.
1. Selected ICC profiles
5. Calculation of L*a*b*-, RGB-, L*C*h*- and
CMYK-values based on selected ICC profiles.
2. Measured sample color
6. Self created color book
3. Calculation of L*a*b*-, RGB-, L*C*h*- and
CMYK-values based on selected ICC profiles
for the current sample.
7. Colors from a color book
8. Variations and visible differences
4. Shows the closest match to the current
sample out of the selected color book.
Chapter 3 – Software SpectroConnect
3.8 Software module: PhotoLab
TECHKON PhotoLab is an optionally available program module for evaluating and
displaying L*a*b* color data graphically. Color differences between sample and reference colors can be analyzed. PhotoLab is only available in the SpectroDens Premium
1. In the upper section of the module window, the color differences between sample
and reference are shown numerically.
2. Reference: viewfinder with tolerance circle
Sample: bold point
The current selected value is marked in white.
3. Color samples and references are directly
imported into PhotoLab by making measurements with SpectroDens having it connected
to the PC via the USB-cable.
Furthermore, color values and complete color
books from the device memory or out of
the PC color library can be selected and be
moved by drag-and-drop with the mouse
pointer directly to the center of the display
where the L*a*b* color circle is.
A pop-up window will ask, if the values should
be used as sample or as reference values.
4. A mouse click on the program symbol
will start the plug-in PhotoLab within the
SpectroConnect environment.
Manual TECHKON SpectroDens
2. ...
1. Samples and references can be selected directly with a mouse click or by choosing from
the “pull-down” menu.
Delete and renaming is done via the menu.
2. Different modes of the L*a*b*-display can
be selected:
 The modes Bargraph and Quality Certification Chart show the trend of ∆L*-, ∆a*- and
∆b*-values of a measurement series.
 The Table View shows all values numerically.
 In the Job window job relevant text data
can be edited.
3. A measurement value highlighted in red
indicates an out-of-tolerance sample.
4. The black circle line indicates the tolerance
limit of the ∆E*-region. If the black pointer
reaches into the outer segment of the circle,
the tolerance has been exceeded.
5. Enlarged view of the tolerance circle
6. Display of the color components ∆L*, ∆a*
and ∆b*.
Chapter 3 – Software SpectroConnect
PhotoLab settings
When you open the pop-up window PhotoLab settings in the menu bar of the program module PhotoLab, you can select and edit three areas.
1. General settings:
This is the window for setting the dimensions
of the L*a*b* color circle and the ∆L*a*b* color
2. Tolerances:
In this window the tolerances for the color deviations are defined and the size of the tolerance circle is set.
3. Mean values:
It can be appropriate to take several single
measurements on one sample which then are
averaged to an average value. The number of
measurements which result in the calculation
of the average value is defined in this window.
Manual TECHKON SpectroDens
3.9 Software module: Media Wedge
The program module Media Wedge serves the fast, colorimetric analysis of the Ugra /
Fogra Media Wedge. This digital control element is available from Fogra, the German “Graphic Technology Research Association” ( The test element
is placed at the border of a proof. The software evaluates the color quality printed in
colorimetric terms.
Color differences between the Fogra target values and the measured samples will be
clearly represented in this program module.
The software module Media Wedge is only available in the SpectroDens Premium
1. Selection of the media wedge version. You
will find the version number on the printed
test element.
3. Selection of reference values
2. With SpectroDens Premium there is a media wedge feature within the device as well.
Measurements can be made remotely without a connection to the PC. When the device
gets connected later, the measured data will
be uploaded.
5. Optionally a short protocol can be printed
on a self-adhesive label with a Dymo label
printer, which can be stuck on the proof, or
a detailed report of the measurement values
can be printed out.
4. Overview of measurement results
Chapter 3 – Software SpectroConnect
After the import of the media wedge a short protocol will be generated and can be
printed on a self-adhesive label with a Dymo label printer.
The software supports the Ugra / Fogra Media Wedge in version 3.0 as well.
The picture shows the section Details.
Manual TECHKON SpectroDens
3.10 Software module: Transfer curve
Using the software module Transfer curve you can fast and easily determine transfer
characteristics on prints and check the compliance of the dot gain according to ISO
12647 targets or individual standards. The software calculates at the same time compensation values for the adjustment during plate exposure.
Values for CMYK as well as spot colors can be analyzed. Measurement results can be
displayed as graphics or charts. Furthermore several curves can be compared and average values can be calculated.
Any step wedge can be evaluated. The design of the step wedge can be defined in 1 %
steps by using the window Reference values.
Chapter 3 – Software SpectroConnect
In the section Target values the target values can be edited. Furthermore settings for
the assignments of the targets can be defined.
Manual TECHKON SpectroDens
3.11 Software module: ISO-Report
The program module ISO-Report allows a fast and comprehensive documentation
according to the ISO standard. The ISO-Report can be printed out.
The software module ISO-Report is only available in the SpectroDens Premium version.
Chapter 3 – Software SpectroConnect
3.12 Software module: SpectroCheck
TECHKON SpectroCheck (optionally available) is a color reference used to check the
measuring accuracy of the SpectroDens advice.
Connect SpectroDens and SpectroCheck via the USB cable with the computer. The
program module SpectroCheck will now lead you step by step through the checking
procedure of the measurement device. The information, whether the device corresponds to the technical specifications, can also be printed out.
Measurement technology
Spectral remission measurement and color density determination
according to ISO 5-3/4
Measurement geometry
0/45° optics to DIN 5033
Spectral range
400 to 700 nm in 10 nm steps
Measurement aperture
3 mm round standard; 1.5 mm round optional
When using the scan function we recommend to use a patch
width of 5 x 5 mm with the standard aperture and a patch width
of 4 x 4 mm with the exchangeable 1,5 mm aperture.
Light source
Polarization filter
Twice linear crossed, switched on and off per button release
Measurement time
Approx. 1 sec. per measurement; max. 8 seconds in scan mode
White reference
Absolute and relative; absolute white standard integrated and
protected in charging console
Illumination types /
Standard observer
A, C, D50, D65, F 2/7/11 / 2°, 10°
Density filter
DIN 16536, DIN 16536 NB, ISO/ANSI T, ISO/ANSI I, ISO E, Dmax
Density measurement range 0.00 – 2.50 D
0.01 D; 0.03 CIE ∆E*a*b*
Inter-instrument agreement 0.01 D; 0.3 CIE ∆E*a*b*
Color LC backlight display, 320 x 240 pixels
Power supply
Rechargeable NiMH battery, regulated recharge via charging
console with AC adapter, 100 – 240 V, 47 – 63 Hz, up to 10.000
measurements per battery charge, battery level control
Communication port
USB; WLAN module optional
480 grams
65 x 55 x 190 mm (approx. 2.6 x 2.2 x 7.5 inches)
System requirements for
Windows XP, Vista, 7 or 8; 32- and 64-bit
TECHKON software Minimum: IBM-compatible PC with Intel Core Duo processor or
comparable processor, 1 GB RAM, 2 USB ports
Performance packages SpectroDens Basic, Advanced and Premium: see page 7
Accessories, spare parts and contents of delivery: see page 8
Specifications can be subject to change without notice. Specifications valid for standard device with 3 mm aperture.
All mentioned trademarks and copyrights are recognized. SpectroPlate, SpectroDens, SpectroJet, SpectroDrive,
SpectroCheck, InkCheck and TECHKON are registered trademarks of TECHKON GmbH.
Manufacturer certificate
applicable for ISO 9000 documentation
Spectro-Densitometer TECHKON SpectroDens
Serial Number:
TECHKON GmbH • Wiesbadener Str. 27 • D-61462 Königstein
Telephone: +49 (0)6174 9244 50 • Telefax: +49 (0)6174 9244 99 •
The device is compliant with EU directive 89/336/EWG concerning the electromagnetic compatibility EMC andis provided with the CE label. The device complies with Part 15 of
the FCC rules and is RoHS compliant (class 9).
The supplied AC adapter is according to regulations UL, IP 40,
IEC 950 and VDE EN-EC10.
The device is maintenance free. The measurement aperture
has to be kept clean from dust. It can be cleaned with clean,
compressed air and an optics brush.
We recommend a functionality check-up every 24 months at
the TECHKON service center, which includes the issue of a new
Manufacturer certificate.
The warranty for TECHKON products is 24 months starting
with the date of purchase. The warranty is invalid if the damage
is caused by improper use of the device. Only original
TECHKON spare parts and accessories are to be used.
The device is according to §14 ElektroG registered under the
EAP no.: DE 98280049. Devices for disposal can be sent directly
to the manufacturer.
The integrated spectral sensor is calibrated by a white calibration. After performing a white calibration with the supplied
absolute white standard integrated in the charging console,
the device is long term stable. We recommend to make a
white calibration before every measurement series, to ensure
the device is calibrated correctly.
The remission values documented on the back of the charging console are derived from a ceramic white standard,
which is referenced to measurements taken and certified by
the German Institute for Material Testing (Bundesanstalt für
Materialprüfung, BAM).
The measurement device is manufactured according to the
recommendations of the technical standards DIN 5033 part
1-9, CIE, DIN ISO 16 536 part 1+2 and ISO 5-3.
The accuracy of the device is checked during the manufacturing by spectral measurements on color samples which were
measured and certified by the German Institute for Material
Testing (Bundesanstalt für Materialprüfung, BAM).
The calculation of colorimetric values is according to the formulas and tables of DIN 6174, DIN 5033 part 1-9 and CIE.
The calculation of densitometric values is according to the formulas and tables of DIN 16527 part 3, ISO 5-3 and the handbook of standardization of the German Printing and Media
Industries Federation (Bundesverband Druck und Medien e.V.)
and Fogra (Forschungsgemeinschaft Druck e.V.).
D-61462 Königstein
EC Declaration of Conformity
Déclaration de Conformité de la CE
Dichiarazione di conformità CE
Hersteller:TECHKON GmbH
Manufacturer / constructeur / costruttore
Adresse: Wiesbadener Str. 27
Address / adresse / indirizzo
D-61462 Königstein
erklärt, dass die Produkte:
Declares that the products / déclare, que le produits / si dichiara che il prodotto
Type / tipo
Intended use / utilisation prévue / uso previsto Color measurements / mesure de la
couleur / misurazione del colore
bei bestimmungsgemäßer Anwendung den grundlegenden Anforderungen
gemäß EU-Richtlinie 2004/108/EC entspricht und dass die folgenden Normen
angewandt wurden:
complies with the essential requirements of the 2004/108/EC Directive, if used for its intended
use and that the following standards has been applied: / répond aux exigences essentielles de
l'article 3 de la directive 2004/108/EC, prévu qu’il soit utilisé selon sa destination, et qu’il répond
aux standards suivants: / soddisfa tutti i requisiti della direttiva 2004/108/EC qualora venga utilizzato per l’uso previsto e che le seguenti norme siano applicate:
angewendete Norm:EN 55022:2006
Applied standard / standard appliqué /
Ausgabe: 2008-05
norma applicata issue / édition pubblicato
+A1: 2007
EN 55024
Ausgabe: 2003-01
Please send me information about
the entire TECHKON product range
Please put my E-mail address on the
mailing list for the TECHKON-Newsletter
Wiesbadener Str 27
D-61462 Königstein
Via telefax to: +49 (0)6174 9244 99
TECHKON Registration card
Device Serial number:
(Label on the bottom
of the device)
Your TECHKON-Dealer:
City / ZIP-Code:
Department / Job title:
Please send this registration card by mail or via telefax to us. This way we can keep you informed in future about product news.
You can send your registration information by E-mail as well.
TECHKON GmbH  Wiesbadener Str. 27  D-61462 Königstein/Germany  Telefax: +49 (0)6174 9244 99  E-mail:
Erfolg ist messbar
Wiesbadener Str. 27 ∙ D-61462 Königstein
T +49 (0) 6174 / 92 44 50 ∙ F +49 (0) 6174 / 92 44 59 ∙
Was this manual useful for you? yes no
Thank you for your participation!

* Your assessment is very important for improving the work of artificial intelligence, which forms the content of this project

Download PDF