CoPrA 6.0.1 Release | March 2020
Bug fixes and improvements in CoPrA 6.0.1
Several improvements have been made in the Image Conversion dialog:
A minor cosmetic correction has been made under macOS so that the dialog no longer jumps when switching between the options Save Image and Use Layer.
The checkboxes Embed target profile and Convert to Lab now also check whether profiles are available or have been deleted. In case they are not available he checkboxes are greyed out accordingly.
The Stop button that appeared instead of the Save button when converting a file had no function and has been removed.
In the Linearization module it is no longer possible to load unsupported color spaces with 1 or 2 channels or RGB via the Measure Tool. Only CMY, 3-channel, CMYK and multicolor color spaces are supported for linearization.
The buttons for OK and Cancel in the dialog that appears when a profile report should be overwritten were swapped under macOS. This has been fixed.
In the SaveInk module, the two default settings for TAC reduction (TAC-Limit220 and TAC-Limit300) have been adjusted so that less black is used.
A new information message has been added if the black channel is switched off and on again under Used Channels during Printer and/or DeviceLink Profiling. However, since the black channel turned off affects the setting under Maximum Black and this is reduced to zero, this setting will be retained when re-activating the black channel. The message The black channel is reactivated. Check and, if necessary, change the setting for Maximum Black under Black Point and TAC should remind the user to set the desired maximum black again.
In the profile report of multicolor to multicolor DeviceLink profiles, the Multicolor Mode Preserve Color Properties used in the profile is now displayed correctly.
The two checkboxes Pure Black and Pure Gray are now available again for RGB printer profiles and are no longer grayed out.
In the printer profile, the status of the two checkboxes Pure Black and Pure Gray as well as Used Channels is now correctly checked when switching the black channel on and off. In the previous version, the checkboxes remained grayed out even though the black channel was switched on again.
CoPrA stores the original and corrected measurements in separate tags (TARG and TARG2) in printer profiles created in the New Printer Profile and Update Profile modules. Corrected measured values are created when Measurement correction and/or Brightener correction has been activated. In version 6.0.1 it has now been corrected that in the Update Profile module two tags with the same measurement data are no longer saved, if the two checkboxes for the corrections have not been activated at all.
The displayed gamut volumes in the Gamut dialog of the Profile Manager and in the printer profile report now match. (Ticket #191649)
The incorrect error message that occurred when the Measure Tool was opened from CoPrA without a loaded measurement or reference file has been corrected. The Measure Tool now opens without error message and the desired reference file for measuring the test chart must be selected there.
The index error that occurred when transferring measured values from Measure Tool to CoPrA has been fixed. If the dialog for selecting the measurement condition has been closed from the user without selecting one condition, no error message is displayed anymore.
The Iteration module can now also be tested with a demo license. Until now this was not possible. (Ticket #191542)
In the Linearization module, the Default and Flexo Linearization presets have been updated. Both presets now also use the automatic channel limitation. If the channels are not sufficiently differentiated, this leads to a reduction of the individual color channels depending on the loaded measured values and thus to a better linearization.
The DeviceLink settings saved in RGB-to-RGB and RGB-to-Multicolor profiles are now correctly loaded and displayed in CoPrA again. This was previously incorrect.
Note: The settings from all CoPrA profiles can be loaded by drag&drop onto the Settings drop-down menu.
During DeviceLink creation, the 100% Black exception did not work in conjunction with the Relative Colorimetric rendering intent and certain Black Control Range settings. This has been fixed. (Ticket #201823)
When creating DeviceLinks with multicolor color spaces, the calculation of the exception Border Clipping has been improved. However, due to the use of Look-Up Tables (LUTs), there are still transition areas where small percentages below 1% may appear. (Ticket #201787)
CoPrA 6 Release | September 2019
Main new features
- SaveInk for Multicolor and for CMYK
- New module DeviceLink Iteration for optimizing DeviceLinks, e.g., for high quality proofing
- Extended Image Conversion features for pixel-based formats (TIFF, PSD, JPEG) to simplify checking of color conversions
- Avoid dot-on-dot feature to improve Multicolor separations for printing with AM screening
- Support for more Linearization output formats to be used in Photoshop and external RIPs
- New ink limiting function for Linearization DeviceLinks
- New profile naming options and templates for better automatic profile naming
- Password protection for settings
Minor new features
- New DeviceLink features simplify adjusting the Black Generation and Multicolor modes
- Profile Report improvements
- Support of more than 7 channels for DeviceLink creation
- Improved black point curve and numbers visualization in Multicolor modes for special inks
- Improved interaction between ColorAnt and CoPrA when using multiple measurement conditions
- Share CoPrA profiling settings with ZePrAs Auto-Import folder
- New Notes feature for profiles in Profile Manager
SaveInk for Multicolor
Users of the SaveInk module who also have a Multicolor license will benefit from the extension of the SaveInk module to create SaveInk DeviceLink profiles based on Multicolor profiles. Previous versions of CoPrA only allowed the creation of CMYK SaveInk profiles.
Note: ZePrA 7 supports SaveInk Multicolor DeviceLinks. For example, not many workflow tools are capable of processing a 7CLR-2-7CLR DeviceLink besides ZePrA.
For Multicolor profiles to use SaveInk profiles, a black channel must be present and it must be the fourth channel. Profiles that do not follow those rules can not be selected.
Note: For Multicolor profiles the exceptions to preserve skin tones and custom exceptions are not available.
A new Iteration tool has been added to DeviceLink profiling. It allows you to improve an existing DeviceLink profile based on a printed and measured test chart and requires a DeviceLink license. Even DeviceLinks with Multicolor color spaces can be optimized (requires a Multicolor license).
An existing CoPrA DeviceLink profile can be optimized based on measured color values by using a test chart of your choice (can be created with ColorAnt/Custom Chart). The test chart needs to be converted using the original DeviceLink profile and printed on the target printer. The measured color values are then used to improve the conversion in order to achieve lower color differences and a more accurate reproduction of the source color space. Iteration is therefore particularly useful in proofing situations with absolute or relative colorimetric rendering intents. Perceptive rendering intents can also be used as a special feature of DeviceLink iteration in CoPrA. The iteration calculates a new DeviceLink profile based on the original DeviceLink profile and the measured values. The new profile can be reinserted for iteration until the desired result is achieved.
Use the DeviceLink Iteration as follows:
- Select the DLP that you would like to improve
- Print a small profiling test chart (can be created with the Custom Chart tool in ColorAnt) on your printer via the DLP.
- Measure the chart and load the measurement data in the dialog
- Click on Save to calculate the iterated profile.
Extended Image Conversion features
The goal of the Image Conversion tool is to convert pixel-based files for profile evaluations, e.g., while evaluating a demo version of CoPrA, or to figure out which profile settings provide the best color rendering. This feature has been improved and extended by revamping the entire dialog to enlarge the preview of the loaded image shown on the right side of the dialog. In addition, more options for converting to Lab are added, and conversions can be saved in piled layers in one file to better check different color conversions in Photoshop.
The left side of the dialog has three sections
- The first section allows you to load the image file to be converted. An embedded profile will be shown below the path to the image. Next to the path of the image a small icon represents the color space of the image.
Note that the Image Conversion tool does not support retaining Photoshop layers or transparencies, yet image files such as Photoshop PSD and TIFF files with layers or transparencies will be converted correctly. Only the compatibility layer will be color converted while additional layers and transparencies are removed.
- The second section allows you to load source and target ICC or DeviceLink profiles. If a target profile is available, it can be embedded in the converted file. This is also true for DeviceLink profiles and the linked target profile used in that DeviceLink. The Convert to Lab option is useful to compare images with different target color spaces or to evaluate the color appearance of color conversions with Multicolor profiles. The latter is an excellent addition to the Image Conversion tool since Photoshop does not allow you to preview Multicolor images correctly, nor does it allow you to apply a conversion from Multicolor to Lab. In case the Convert to Lab checkbox is enabled, an additional checkbox for Paper White Simulation also can be enabled. If that checkbox is enabled the conversion to Lab uses the absolute colorimetric rendering intent. If it is disabled it is using the relative colorimetric rendering intent.
- The third section contains a Mode switch. You can either save the converted image using the Save Image mode or, with Use Layer, you can add a layer with the converted image in PSD file format. The same original image can be converted multiple times with different conversions and the resulting file can be placed as a layer on top of the previously converted image. With this PSD file you can switch between the layers in Photoshop to evaluate the quality of the conversions. The layers names contain the profiles that have been used for better identification.
Avoid Dot-on-Dot in Multicolor separations
When printing with gamut extending process colors such as CMYK+Orange+Green+Violet/Blue in traditional AM screening, the process colors Violet or Blue are often put on the same screening angle as Black. This can result in so called Dot-on-Dot issues leading to color and lightness variances. However, avoiding Black and Violet/Blue color combinations in separations would significantly reduce the available gamut and would also prevent dark bluish spot colors from being reproduced reliably. Therefore when the Avoid Dot-on-Dot feature is enabled, the separation will use more of the CMY colors instead of Black when combining with Violet/Blue.
The Avoid Dot-on-Dot feature is available in the Printer Profiling and DeviceLink Profiling modules.
Note that other color combinations using the same AM screening angles such as Cyan and Orange or Magenta and Green will not be touched by this feature because those combinations are rarely used in separations.
Ink Limiting function for Linearization DeviceLinks
Ink limiting during linearization is necessary if ink channels are saturated and do not provide sufficient differentiation between the individual color values at higher ink densities. This is typically done by printing a step wedge and then visually determining the percentage up to which a good differentiation exists. The ink channel is then limited at this value. We have added an automatic channel limit function that does exactly this based on the saturation values of the measurements. This function has been added to the two Calculation Modes ColorLogic Default and Linearization according to ISO20654.
Note: For the G7 mode the channel limit function has not been made available as this would contradict the G7 linearization methodology. Ink limiting should be done before applying G7.
Additional Linearization output formats supported
The final window of the Linearization module provides two new checkboxes to save the linearization curves either as Photoshop ACV files or as XML files according to the format definitions in ISO 18620:2016. Files saved in the Adobe Photoshop Curve format (ACV) by CoPrA can be imported in Photoshop and applied to images. This also allows linearization curves calculated by CoPrA, e.g., G7 or ISO 20654 (SCTV), to be used in Photoshop.
ISO 18620:2016 specifies a simple, extensible XML format for the exchange of tone adjustment curves between applications including but not limited to color management, calibration and raster image processor systems. Some RIPs such as Esko Colorpilot support this format which allows you to import and use the high quality curves generated by CoPrA.
The curves are saved with the same name as the ICC profile in the User/Documents/CoPrA/Linearization folder.
The Size chooser has two options, small and large which affect the number of data points saved in the ACV and XML formats. small creates 11 points for ACV and XML while large creates the extensive 51 points for XML and 16 for ACV. The size does not affect the ICC DeviceLink profile created because it will always use the highest precision.
In addition, in Profile Manager there are new options added to the context menu to create ACV or XML curves from existing Linearization DeviceLink profiles.
Profile naming options and templates
A new Templates option has been added in addition to the Profile Name section. When clicking, the Automatically generate file names window opens. Here you can select and combine name components that are specific to each profile module from a list of options and save them as a custom template. The last selected template is used for all new profiles created so that the naming of profiles can be automated.
Available naming options are date, date and time, measurement data file name, source and target profiles, name of the current preset and others. The option selected in the drop-down menu can be added in any order by the designation of the cursor in the Template section. In addition to the default options, user-defined text can also be added in any position in the Template section. The Example section below shows how the compiled name will appear.
The new Protected Mode available under Preferences allows to lock and protect all custom settings. If enabled – with or without a password – changing a selected profiling Setting is denied. This feature proves to be practical if multiple operators in an organization are creating profiles, and only a defined set of settings should be used instead of every operator using their own settings. Once the protected mode is enabled, options in the Preferences are disabled and importing and exporting of settings is denied.
If you need stricter permissions, the Protected Mode can be used with a password. Enter a secure password and confirm by entering it a second time. If a password has been set, it must be entered each time the protected mode is deactivated. To remove or change the password, click Reset Password.
- The new Black Generation mode Target Profile with ColorLogic Gamut Mapping is now availed in the DeviceLink module. In addition to the already existing mode Target Profile which disables all settings, the new mode allows you to edit them when clicking the Modify button. This often comes in handy as it allows you to start with the existing settings of the target profile and then modify them to your needs.
- For Multicolor target profiles in the DeviceLink module there is a new Multicolor Mode: Use Settings of the Target Profile. If the Multicolor profile is a CoPrA printer profile, this mode will use the mode that has been selected during printer profile creation. The mode used will be shown in brackets. This helps identify which mode was used and is to be used. For non CoPrA Multicolor profiles the Strong Multicolor Mode will be used.
- A new Default DeltaE Method selection (dE76 or dE2000) for profile reports can be selected in the Preferences.
- Support of up to 9 channels for DeviceLink creation. Previous versions of CoPrA supported up to 7 channels.
- Improved black point curve and values visualization in Multicolor modes for special inks.
- Improved interaction between ColorAnt and CoPrA when using multiple measurement conditions.
- Additional Black Point Calculation option called Darkest for maximum density/lowest L*.
- In the CoPrA Preferences there is a new option to share CoPrA profiling settings with ZePrA via a shared folder. This is the only way to share settings between CoPrA 6 (and higher) and ZePrA. It has the advantage that CoPrA and ZePrA no longer need to be installed on the same computer. The folder must simply be shared by both applications ZePrA and CoPrA via the network, a shared folder or via the cloud.
Note: If the checkbox is enabled and the Preferences dialog closed with OK an information message will appear asking the user if all shared presets should now be copied to the defined Auto-Import Folder.
- In Profile Manager there is a new tab to leave Notes for a selected profile. These notes can then be used as a filter in the Search feature. For example, you might write the name of a customer or a project as a note in a set profiles for that customer. With the Search for option set to Notes you simply can enter the text and all profiles with that exact text will be listed.
- The Profile Reports have been enhanced in several places. There is a new Color Generation section added to each profile type which allows you to identify the settings that have been used during the creation of the profile. The reprofiler report of the Update Profile module now incorporates the device color values of the selected test chart in addition to the Lab data. This makes it easier to identify the color values. In the General Information section of the report, useful information about the size of the profile and the version number of the used CrossXColor profiling engine has been added. The DeviceLink profile reports now show more curves for secondaries.
CoPrA 5.0.1 Release | March 2019
Bug fixes and improvements in CoPrA 5.0.1
- The Printer Profiling and DeviceLink Profiling modules smoothness of the gray balance for some data has been improved. This can be recognized in the profile report when comparing profiles between version 5.0.1 and previous versions. (Ticket #180922)
In the Printer Profiling and DeviceLink Profiling modules the Black Point calculation has been improved. This improvement avoids strong spreading of the CMY components in the black point which may lead to a slightly less neutral (e.g. a*/b* not equal to 0) black point compared to previous versions but better printability.
While improving the Black Point Calculation some issues have been fixed regarding the displayed device and/or Lab values for the calculated black point in the user interface of the Printer Profiling and DeviceLink Profiling modules. What is now shown as being the black point in the user interface will with the exception of the special ink Multicolor modes actually be used in the profile.
Note: With rare special data sets some discrepancies occurred with previous versions.
In the Printer Profiling and DeviceLink Profiling modules when disabling a channel under Used Channels the appropriate channel gets an X icon and will be disabled in combination with an X icon in the Black Point and TAC section, too.
In the Image Conversion tool TIFF images with Lab color space are supported now.
Errors during loading of TIFF files in the Image Conversion tool have been fixed. (Ticket #180974)
Channel names in Multicolor TIFF and PSD files generated by the Image Conversion tool do not contain invisible characters any more.
In the DeviceLink module an index error has been fixed when selecting special profiles as Target Profile. (Ticket #180962).
In the DeviceLink module an index error has been fixed that occurred when using a profile that has not been saved to the systems profiles folder.
In the DeviceLink module the Gray / 100% Black exceptions have been fixed in case of CMYK-to-Multicolor with Target Profile selected as Color Generation mode. (Ticket #180781)
A warning message has been added to the DeviceLink module in case the Perceptual or Saturation rendering is selected in combination with the exception Adapt TVI to source profile. The warning should indicated that such Rendering options will not work in combination with the selected Exception.
In the DeviceLink module it has been fixed that when selecting the Preserve Color Properties Multicolor mode the black curve from the Curves diagram was gone.
In the Printer Profiling module it has been fixed that the sliders for Black Start and Black Width have not been disabled when Max Black is zero. (Ticket #180919)
The Black Point calculation setting Automatic has been fixed in the Printer Profiling module when importing a profile setting with a Multicolor black point. (Ticket #18071)
The Printer Profiling module will now refused to load reference data with more than 15 channels.
DEMO profiles will now be recognized by manufacturer tag instead of the file name. In previous version the key word “Demo” was used for the recognition which is not reliable.
It has been fixed that serialized Linearization DeviceLink profiles have not been saved to the chosen Custom profile folder under Preferences.
It has been fixed that Linearization DeviceLink profiles can be generated with CoPrA L, too. In previous versions this was not possible.
In the Linearization module it has been fixed that linearization curves shown under Curves from data have been displayed based on the ColorLogic default method but should be displayed based on ISO 20654. (Ticket #180698).
Several issues with selecting profiles in the Editing module have been fixed.
The speed of the Range slider in the Editing module has been increased.
Fixed some links to the Online Help and updated help content.
A floating point range validator to the dE Tolerance input has been added in the SaveInk module. This allows to manually enter values with decimal places.
In the Recalculate module the profile selection has been fixed. The profiles under Current profile and Recalculate with must both be valid, instead of before, when only one valid entry was enough. Note that this fix leads to a slower reaction of the user interface of the Recalculate module.
In the Profile Manager2D view in the Gamut tab of printer profiles with loaded Sample Data has been significantly improved. This will allow for a better recognition of in and out of gamut sample data values, and it allows for better recognition of matching data to a given L* slider position. (Ticket #181044)
Note: In previous versions the dots that have been shown had a certain range around the selected L* slider position in the 2D view which made it hard to judge if a sample color had the exact L* value or not. Now bigger white balls in the 2D view indicate an exact match between the sample and the profile with the selected L* slider position. Light gray balls are a little bit smaller in diameter and indicate a match between the sample and the profile with 1 delta L* deviation to the selected slider position (e.g. values with L* of 49 or 51 in our screenshot). The smaller dark gray balls indicate sample data that are 2 delta L* away from the selected L* sider positions. Other values that are further away than 2 delta L* will not be shown.
The new ColorAnt 5.1 with Measure Tool v2.1 has been included in the installer.
CoPrA 5 Release | April 2018
CoPrA 5 is a major upgrade. The range of DeviceLink functionalities has been extended with a new Linearization tool, which is included in CoPrA 5 L and higher. New features in Printer and DeviceLink Profiling expanded the black generation and transformed it into the new Color Generation, offering convenient new options like an easy way to select or exclude individual channels for the separation or the visualization of gamut changes in real time. The new algorithm of the SaveInk module now allows even greater ink savings. Overall users will experience a faster startup of the application and users can get all this at competitive package prices.
DeviceLink Linearization optimizes the tone values of primary gradation ramps for any printer and color combination. The goal of Linearization is for adequate differences from white to 100% of primary inks, smoothing of gradation curves and adjustment of primary colors to a defined, reproducible condition.
CoPrA includes the most advanced colorimetric technologies that are not readily available at the RIP level. ColorLogic’s Default calibration method and ISO 20654 (also known as Spot Color Tone Value, SCTV) are supported for Multicolor printing. CoPrA 5’s Linearization also features G7 calibration and the Protect Lights slider for Flexo printing and calibrating on difficult media and printers.
Calculation Modes can be used for CMYK and Multicolor printing with additional options for G7 for CMYK channels of Multicolor printer and ISO 20654 (SCTV) for spot colors.
How to create a Linearization DeviceLink
Print primary ramps on an uncalibrated printer without any color management. There are two ways to get the necessary measurement data for the creation of a Linearization DeviceLink profile:
Measure the test chart and optimize the measurement data using software, such as ColorLogic’s ColorAnt and open the measurement data in CoPrA; or measure data by using CoPrA’s Measure Tool.
Settings can be customized and the curves can be checked directly before creating a DeviceLink. This DeviceLink profile can be used in any workflow for any type of printing process. For example, when printing a profiling test chart on an uncalibrated printer.
ColorLogic ZePrA supports the use of Linearization DeviceLinks as gradation curves. By using this method, linearization can be applied in the workflow like corrections curves in a RIP. When applying corrections in the RIP other curves must be disabled to avoid double corrections.
Gray Balance Modifications
A new feature in the Printer and the DeviceLink module allows adjustment of the Gray Balance. Users can choose between a cooler and warmer gray balance. This is a nice feature when visual adjustments based on personal color preferences are desired even though perfect colorimetric profiles exist. The effects of changed slider settings are shown in the program in the adjacent graphic.
Note: The Gray Balance setting works independently from the Perceptual Rendering making it a perfect fine tuning tool for any chosen ColorLogic rendering. It will only be used for the perceptual rendering of a printer profile. However for DeviceLink profiling it can be used for any rendering including the four standard ICC rendering intents.
Excluding Channels when Separating
This new expert feature allows packaging professionals to define the channels (including Multicolor channels) of a printer or DeviceLink profile to be used when separating data. For example, if a brown chocolate artwork is intended to be printed in CMYK without using any Cyan in the separation, a CMYK printer profile can be created which only uses MYK. These types of profiles avoid unwanted Cyan dots in the separation and the converted artwork would appear visually close to a conversion with a complete CMYK profile. The new feature can be found in the Color Generation tab of the Printer and DeviceLink profiling modules. This function is particularly intelligent for Multicolor profiles as it searches for replacement colors in the Multicolor channels when excluding a channel (e.g. Cyan) which can compensate for the missing channel in the gray balance. The alternatively calculated Multicolor channels are displayed grayed out in the panel Black Point and TAC.
New Gamut Visualization for Printer Profiles
The Printer Profiling module includes a new feature to visualize the effects of the selected color separation and Black Point settings. The Gamut view available in the tab Color Generation visualizes changes of the gamut shape immediately when altering settings and provides a real time preview of the profile gamut to be expected. The user can immediately see how changes in the settings affect the gamut, for example, how a reduction of the Black Width slider or a very late Black Start reduces the ability of a profile to render dark colors. The Gamut Volume is calculated and displayed in Lab volume units allowing the user to easily find the settings that produce the largest gamut (highest number).
New Black Point Options
The Black Point and TAC of a profile are important settings as they define the maximum contrast and depth a profile is able to produce when separating data. We have changed the graphical display of the black point and added number fields for each channel with a colored icon in front of each number field. Editing will be faster, especially if non-standard color combinations are used in Multicolor printing with non-CMYK inks. The colored icons are a guide to the channels used to build the Black TAC. Depending on the selected Black Calculation setting the number fields are either disabled or enabled.Selecting Auto automatically uses all channels to calculate the black point and therefore individual editing of channels is disabled. The Auto mode will not use any Multicolor channels beside CMYK or in general the first four channels for the Black TAC.The mode Balance CMY allows editing of the black channel (or in general the fourth channel) and additional Multicolor channels. Entered Multicolor color values are fixed – like the Max.Black value – and CMY values will be calculated accordingly.
The mode Custom allows editing of all channels.
Note: For Multicolor profiles with more than four channels you can use the extra Multicolor channels for the black generation besides the first four channels (typically CMYK). However, the total area coverage (TAC) cannot exceed 400%. Values for the Multicolor channels can be entered manually when using the settings Balance CMY or Auto and these values will then be used to calculate the Black TAC. Usually it is not necessary to use those channels but sometimes a dark Multicolor channel adds desired contrast and definition. This can easily be checked by viewing the Lab values below the Custom fields. If the addition of a certain Multicolor channel decreases L* while a*b* values are not significantly altered, using this channel can be considered. However, the gray balance will use additional channels as well.
Improved SaveInk Module
The user interface of the SaveInk module has been streamlined and the save ink Methods have been simplified. Now there are only two methods – Easy and Advanced. The Easy method reduces the settings a user needs to define to a minimum but still achieves economical high quality profiles. Only three settings have to be adjusted in the Easy method: the Total Amount of Color, the Ink Saving slider and the exception Preserve 0% Black.
In the Advanced method all settings are enabled making this the preferred method for advanced users. It introduces a new dE-Tolerance slider which allows tremendous ink savings when set to a high tolerance. dE-Tolerance increases the maximum deltaE between the original profile and the SaveInk DeviceLink profile which results in greater ink savings. In contrast, the predefined Settings SaveNeutral, SaveStrong and Maximum use a low tolerance setting of 0.5 deltaE ensuring a very high color and visual accuracy of the profile. However if greater ink savings are desired it can only be done by reducing the visual accuracy, hence a higher dE-Tolerance setting is required. The new Extreme ink saving preset uses a high dE-tolerance.
Note: Users can save on ink even more by using a higher dE-tolerance setting. We recommend to test ink saving profiles with high tolerance settings closely before using them in production.
New Profile Search Feature
Everybody working with lots of ICC profiles on their system knows how hard it can get to find a specific ICC profile in a crowded drop down menu. In CoPrA 5, all profile drop down menus now function as a search field. Simply type in some letters of the desired profile and only those profiles containing these letters will be shown in the drop down menu. This is a feature power users will love. ESC deletes entries on the Mac and the previously selected profile reappears in the list. Under Windows it is sufficient to click elsewhere to delete entries.
Support for two Gamut Extending Colors per Color Section
The principle of ColorLogic’s Multicolor profiling works as follows:
- We support three main chromatic primary colors which should span a large enough gamut encompassing the gray balance. Typically this is CMY but it can be any other reasonable chromatic color combination.
- Black can be added as an optional fourth channel. If black is used it must be the fourth channel.
- Up to two gamut extending colors can be used in between each section of the main primary colors. This new functionality has been added to CoPrA 5 as CoPrA 4 supported only one gamut extending color.
- Following this approach, printer profiles with up to 10 channels could theoretically be created by CoPrA however, from a quality point of view it is not recommended to create profiles with more than 8 channels. Each additional channel increases the profile size exponentially, so that either a very low grid size or an exorbitantly large profile would have to be used.
The standard Multicolor case
If a standard Multicolor color space with CMYK parts is used, the additional inks Green, Orange and Violet extend the gamut in each section of the three primary colors. In between each section of the primary colors one gamut extending color is used making it a color space with 7 colors.
The advanced case
Some new inkjet printers use a Red and an Orange ink in addition to the standard CMYK inks. CoPrA is able to profile such a 6 color printer since Orange and Red are two gamut extending colors of the main primary color section Yellow and Magenta.
Note: Special test charts must be used when working with two gamut extending colors. Currently ColorAnt isn’t able to create such test charts. We have added new Multicolor test charts for those advanced cases which use two additional channels. The test charts are available via the Tools menu (Open Testcharts folder > Testcharts > Multicolor).
CoPrA 4.2.1 Release | October 2017
- Color reproduction in the highlight areas of DeviceLinks have been improved. Most relevant for print processes which show large differences in tone value increases of highlight areas between the source and target profile, such as flexo printing.
- The calculation of Exceptions in DeviceLink profiling using Gray and 4CLR profiles as well as certain Black Generation modes (like MinK) have been improved.
In the DeviceLink profiling module warnings which occurred when using Exceptions have been optimized and improved. For example, using the exceptions Triplex and Duplex in combination with the black generation mode MinK is not recommended and now results in a warning message.
CoPrA 4.2 Release | October 2017
- From CoPrA version 4.2 forward, ColorAnt 4 and the Measure Tool are included. Detailed information about the Measure Tool can be found here
- Two new Multicolor Modes available for printer and DeviceLink profiling. The Multicolor Mode Strong has been revised significantly. Detailed information on the feature Multicolor Mode as well as the use of its modes can be found in the online help.
- The Highlights feature, for simulating the first printed tone, has been expanded providing two new options for printer profiling and three new options for DeviceLink profiling. Highlights features are available here.
- The maximum value for the Highlights option has been increased from 10% to 20%. (Ticket #170078)
- CoPrA SP (Serialized Profiles) creates encrypted profiles which are valid for the serial number of the licensed dongle or computer. licenses allow the generation of profiles which are valid for further serial numbers and thus can be used on other computers as well. Please contact us for details and availability.
- The calculation of printer profiles using measurement data whose primaries are lighter than substrate white have been improved. Color values that are lighter than substrate white are no longer truncated, therefore better proofs can be created.
- The interface has been improved for multicolor and 4CLR profiles that don’t contain black. Information on Black Generation and Multicolor Mode will now be displayed during printer profiling. Information about the use of Exceptions will now be displayed during DeviceLink profiling.
- A SaveInk license only can now be issued.
- The Predefined settings for TAC (TAC – Limit300 and TAC – Limit220) in the Save Ink module have been changed.
- Profile Manager – the display of curves of multicolor profiles and profiles not composed of CMYK have been optimized. Curves displayed with the correct primary color names.
- DeviceLink module – the calculation of Exceptions for Predefined settings have been improved.
- The Black TAC setting correctly stores the datat in the information tag of printer profiles and will be displayed correctly when imported into CoPrA.
- CoPrA can be started by draging and dropping an ICC profile or by using the Open with in the contextual menu of the operating system (Ticket #170170)
CoPrA 4.11 Release | January 2017
- The user interface now provides improved feedback when calculating. In CoPrA, various calculations are displayed in the user interface, e.g. for the preview of curves of the separation, the black point, or the exceptions for DeviceLinks. When calculations are made, the Next and Back buttons are deactivated and not active until the calculation has been completed. This ensures that no unwanted settings are applied to the profile calculation.
- Profile reports for CMY printer profiles and DeviceLinks with CMY target profile can now be generated.
- A filter for searching CMY profiles has been added to the Profile Manager.
- The Printer Profile and DeviceLink profiling modules, new Settings have been added for profiles without black separation. The screenshot shows the recommended settings (No Black Separation) for a CMYK profile that does not have black in the separation. Such separations are very useful for the pre-press in the packaging sector.
- For DeviceLink creation, the Print-to-Print – No Black Setting is for a CMYK-to-CMYK DeviceLink without a black separation. Note: by default, the exceptions are set appropriately so that no black is generated.
- A serious error in the measurement data correction for RGB printer profiles has been corrected. (Ticket # 177647)
- Errors in the slider for the setting of the Maximum Black in printer profiles have been fixed. The selected setting can be reset. (Ticket # 112546)
- In the DeviceLink module, display errors in the user interface have been fixed with Exceptions and the Automatic Mode.
- A bug that new ICC profiles added to the system while was running and not displayed has been fixed.
Note: The profile lists are only updated if the application is sent to the background and brought to the foreground. It may take up to five seconds for the list to be refreshed. If the application is running all the time while profiles are being added, the profile lists are not updated to prevent unnecessary calls that would slow down the application.
CoPrA 4.1 Release | Jan 2017
- The calculation of the Gray Exception in the DeviceLink module has been improved. For some profile combinations grays are now rendered darker and thus more accurate to four colored gray vs the gray exception setting. (Ticket #138870)
- The Viewing Condition in Printer Profiling tool option XYZ has been fixed. It was not possible to edit or change the values. (Ticket #463599)
- The encoding of the description tag in ICC version 2 profiles has been changed to 7bit ASCII instead of MacRoman.
- Scanner profiles caused a missing ICC tag message when creating reports and could not be used as input profiles in the Editing module has been resolved (Ticket #494379).
- Several issues that caused performance issues in the Printer Profiling and DeviceLink modules have been improved.
- Some scaling issues in the table showing the profiles in the Recalculate module have been fixed.
CoPrA 4.01 Release | May 2016
- Added support for one color multi channel profiles in Image Conversion.
- Fixed encryption of serialized profiles. Certain situations could have caused errors with SP profile encryption.
Note: This only refers to SP licenses.
- Fixed minor layout issues in the PDF Profile Report.
- New UPPCT 2.3.4 measuring tool
- The new UPPCT supports a few more languages. It supports now Croatian, Serbian, Bosnian and Czech languages, too. Not all special characters are correctly displayed though.
- Settings for the X-Rite i1Pro 2 instruments for remission and scan readings have been fixed.
- Fixed an issue with wrong measurement data with Konica-Minolta FD-7
- Improved the Barbieri Device Wizard (stability, usability)
- Fixed the bug that UPPCT crashes when trying to switch from the Virtual Device to Barbieri Spectropad
- The new printing references for FOGRA51 and FOGRA52 have been added for comparison purposes.
Note: To use the comparison feature a paid license is needed. Licenses are available from Ugra.
CoPrA 4 Release | March 2016
Updating Printer Profiles
Printer profiles need to be updated when colors change in order to ensure a consistent color reproduction. A printer profile can be updated in just a few steps:
- Print and measure a small reprofiler test chart on the printer to be updated.
- Select the reference profile to be updated and the desired profile settings.
- Calculation of the optimized printer profile.
- Optional: Create a correction DeviceLink profile based on the reference and the updated profile to adjust print data to the color changes.
- Note: Creation of DeviceLinks requires the tool Devicelink Profiling which is included in the packages CoPrA 4 L, XL and XXL.
Automatically Recalculate DeviceLink Profiles
Existing DeviceLink profiles can be adapted to new source or destination profiles using the module Recalculate. This function is useful when an optimized printer profile based on a reference profile has been created using the printer profiling tool Update Profile and all existing DeviceLinks based on that reference profile have to be adapted to the new optimized profile. For the recalculation CoPrA uses the settings of the original DeviceLink profile (the settings that were used when the profile was created) and replaces a currently used profile with a new source or destination profile (depending on the application). If many DeviceLinks need to be adapted to new profiles or many DeviceLink profile combinations emerge the module Recalculate is an effective time saver.
Additional improvements in CoPrA 4
- CoPrA 4 has an improved gamut mapping. Specifically for small, malformed and “strange” color spaces which are more common in industrial applications like textile, ceramics and high speed inkjet. Higher saturated colors and smoother blends providing colors results closer to the original.
- Multicolor profiles have been improved for accuracy, proofing purposes, increasing the gamut and better separations. The Multicolor Mode is Smooth by default (instead of Strong).
- The profile sizes of printer profiles has been optimized. Profiles will be larger in size due to using optimized grid points. This and other changes in the algorithms lead to an increased accuracy of profiles.
Note: Using multicolor profiles with the very large profile size setting may cause issues with certain CMMs and applications. The Image conversion feature or ZePrA Smart Color Server utilize very large profiles.
- The smoothness of CMYK-to-CMYK DeviceLinks has been improved.
- CoPrA 4 is the first ColorLogic universal binary application on the Mac. E.g. the application can run as 32-Bit or 64-Bit with 64-Bit being the default.
- Multithreading support has been added to CoPrA 4. Several profiles can now be calculated simultaneously.
- A new Multicolor Mode has been added for DeviceLinks with the same amount of channels – Preserve the color properties of the source color space. This mode allows for the Exceptions to be applied on all multicolor channels and not only the CMYK channels.
Example: The Exceptions for primariies would maintain all primaries and the secondaries exceptions would maintain combinations of any of two primaries and not only those with CMY combinations.
- Two new filters for searching have been added to Profile Manager for Updated Profiles and Correction DeviceLinks.
- Select a printer profile to be either the source or the target profile for DeviceLinks. For updated profiles an additional option is available that sets the required profiles and settings for building Correction DeviceLinks automatically.
Note: After selecting the profiles, switch to the DeviceLink module to verify settings and to create the DeviceLink.
- Simplified profiling presets for Digital Printers. The Digital Printer preset will automatically check for the best black point and take into account non-subtractive color behaviors automatically.
- Embed Profiles when creating DeviceLinks: Embeds the source and target profile in the DeviceLink. Certain RIP used in production only permit DeviceLinks if source and target profiles are embedded. Helpful in situations where the source and target profiles are not installed on a remote computer.
Note: The file size will be large. Printer profiles are commonly larger in size than DeviceLinks. ColorLogic recommends using this option if one of the two reasons mentioned above apply. ColorLogic applications do not recognize embedded profiles.
- Support of 2CLR, 3CLR, 4CLR profiles in Image Conversion.
- Image Conversion now supports Lab profiles.
- The embedded profile of a loaded images in the Image Conversion feature has been shown in previous versions of CoPrA. The embedded profile will be selected as source profile automatically.
- CoPrA will show demo and serialized profiles in the drop down menus. Demo profiles will only be shown in a demo version of CoPrA and not in NFR or full versions. Serialized profiles (SP versions) – encrypted profiles working with a specific serial number – will only be shown when the serial numbers between profiles and a recent CoPrA version match.
- Manually keying a TAC value in the field under Blackpoint and TAC will not change the Black TAC with negative results. Type in the value and press enter to change the value.
- Importing settings from SaveInk profiles has been improved.
- Creating CMYK profiles from multicolor data has been fix in situations where the GUI was clicked to the background before creating the profile.
- The late Black Start has been improved in DeviceLinks when creating a new separation. The black is not used in lighter values.
- Fixed several quality issues regarding the use of exceptions for DeviceLink profile creation.
CoPrA 3.3 Release | May 2015
Black Generation: Black Point and TAC
The Total Area Coverage (TAC) and the TAC for the black point (Black TAC) can be defined under Black Point and TAC. The Black TAC represents the darkest color value of the profile which is usually identical with the maximum TAC. Overview of Black TAC adjustment Many modern printing systems allow a black point that is generated by with low amount of ink.
Use one license for a Multi-User system
ColorLogic CoPrA 3.3 and ColorAnt 3.01 include a feature to streamline administrating and loading license files for multiple users on the same computer. Macintosh Systems Copy the license file for the ColorLogic applications to the folder:
- Create the folder if it does not exist.
- Check the permissions on the folder
- When the application is launched, by default it will check the location mentioned above by default and load automatically.
Windows Systems Copy the license file for the ColorLogic applications in the following folder: C:\Users\Public\Documents\ColorLogic\LicenseInstall.
- Create the folder if it does not exist.
- Check the permissions on the folder
- When the application is launched, by default it will check the location mentioned above by default and load automatically.
New Profile Report features and profile quality improvements
- The PDF Profile reporting for multicolor printer and DeviceLink profiles has been improved. CoPrA 3.3 adds more accurate visual color previews of ColorLogics’ test images. By applying the methods below, Acrobat will display a more visually accurate report for multicolor or devicelink profiles. The PDF Report test images are converted with the following methods: Lab to perceptual and also relative colorimetric plus black point compensation, images are converted to DeviceN.
- The Spider Web diagram in the PDF Profile Report has been extended to better show the color of the primary and secondary CMYK axises of printer profiles. Multicolor profiles are displayed with the extending colors similar to ColorAnt 3. Colored points and colored lines drawn to the next neighboring primaries.
- Gamut Mapping quality has been improved for lighter color regions specifically for small color gamuts.
- The generation of Multicolor separations of in-gamut process colors have been optimized. In-gamut process colors are located within the gamut of the three main colors (the main colors are often CMY). Adding in-gamut colors is typically not recommended because they are not extending the gamut of a profile. In certain instances these colors are required in production. ColorLogic recommends the Multicolor Mode Strong. The separations of in-gamut colors with this setting generates has been improved over previous versions.
- Note: In-gamut colors are not used with the Multicolor Mode Smooth.
- Black point and gray balance rendering with the Multicolor Mode – Sparse Inks setting has been improved by using CMYK as the Strong and Smooth modes. The results are noticeable most noticeable in the shadow details.
Bug Fixes in CoPrA 3.3
- Crashes in combination of imported profile settings and clicking the Home button have been fixed.
- Several issues importing profile settings have been fixed including issues such as profile settings could not be imported or crashes of the application or wrong display of settings.
- Saving custom profile settings with a custom name using the Save as works without changing settings.
- The error that the CoPrA3 folder under Documents was not created on an initial installation has been fixed. This fixes a subsequent error message appearing when the Preferences dialog opens.
- A general error message appearing in certain cases a PDF Profile Report opening has been fixed.
- We have changed the limit for TAC reduction that CoPrA could use with certain measuremnent data to 275% instead of 300% when using the Black Calculation options Auto or Balance CMY. This improves the black point calculation for several data where the previous limit prevented a better result.
- Several improvements in the generation of Printer and DeviceLink profiles have been carried out. For example works the Max RGB exception in combination with the Multicolor Mode Smooth now as expected. When using Max RGB one channel will be set to 100% to increase saturation.
- The creation of CMYK profiles without any black (K=0%) has been fixed. This will create a CMY separation with no black.
- Issues with the Black Generation Mode MaxK when using a late Black Start have been fixed.
- The Image Conversion feature retains the file format of the image to be converted if possible and does not change it to JPEG as default. In addition the file format will be correctly used when changing to a different format now.
- The index error while using gray profiles in the Image Conversion feature has been fixed.
- Numbers fields are now checked for incorrect entries like characters or numbers exceeding the range of logical input values.
- Profile Manager displays the curves of DeviceLink profiles created by ZePrA’s SmartLink feature.
- The parameter error message when creating a CMYK profile from a 4CLR data set has been fixed.
- Note: In general from nearly any Multicolor data set a CMYK profile can be build using the checkbox Calculate CMYK Profile. This will work with data sets with more than two channels (except RGB). When a data set does not have a black channel it will be regarded as if it would have one to build a CMYK profile.
- Custom channel names for Multicolor defined in ColorAnt 3’s Custom Chart tool are used correctly now when building the profile with CoPrA 3.3.
- Note: When undefined channel names in multicolor data sets from 3rd party tools are used, CoPrA will calculate using the logical channel names from the hue of each channel automatically.
- Incorrect display of IT8 formatted measurement data files provided from third party instruments (e.g. multiline quoted values from Barbieri Gateway) has been fixed. Some small syntax errors certain third party files that prevented CoPrA from opening them have been fixed. CoPrA is more tolerant with such files and will use them.
- A few issues displaying 4CLR test charts and the Multicolor test charts delivered with CoPrA correctly when measuring them with UPPCT have been fixed.
- The error that a profile selected in the Batch Overview feature was not shown in Profile Manager due to blocking filter settings has been fixed. Now filter settings from previous selections in Profile Manager will be deleted.
- An intermittent error for loaded measurement data in the Printer Profiling dialog when using the Fit to width checkbox has been solved.
- The error that the CoPrA splash screen when starting does not disappear any more if UPPCT was started at the same time from within CoPrA has been fixed.
- Some issues with separation curves not updating correctly in the Black Generation tab have been fixed. In addition the displaying error of the vanished filename of measurement data in the Printer Profiling dialog when resizing the dialog has been fixed.
- Using the X button for deleting existing measurement data in the Printer Profiling dialog works again without producing a format error message.
- Minor errors in the Registration dialog have been fixed.
- The Profile Report feature uses the channel names of Multicolor profiles correctly in the Dot Gain section now.
- The TAC for Multicolor DeviceLink profiles is not exceeding the user defined value any more in combination with the Highlights option First Printed Tone from the Exceptions tab.