Tutorial: Creating a DeviceLink Profile

The following tutorial explains the creation of the DeviceLink profile ‘ISOcoated_v2_to_PSOcoated_v3_DeviceLink.icc‘ for the conversion of ‘ISO Coated v2′ to ‘PSO Coated v3′ and the reasons for selecting the settings being used. This DeviceLink profile is available for download from the ECI (European Color Initiative).

  1. Open the tool DeviceLink from the sidebar.
  2. Select ISO Coated V2 300.icc as Source Profile and PSO Coated V3.icc as Target Profile.
  3. Select Print-to-Print – Automatic exceptions from the drop-down menu Setting and click on Customize.
    Note: These settings are selected as a starting point. Additional settings to improve the quality will be adjusted later.
  4. Rendering Intent
    The tab Rendering contains all global settings defining the general color reproduction. If the default setting is changed, this will be indicated by the addition (edited) to the name of the setting. Select the option Blackpoint Compensation from the left drop-down menu and move the Merge slider to the left.

    The applied Gamut Mapping Approach
    Unfortunately, the perceptual rendering intents for printer profiles of different manufacturers may be incompatible to each other, due to different gamut interpretations. For that reason we have decided to select the option Blackpoint Compensation. It is comparable to the setting Relative Colorimetric with Black Point Compensation from Adobe Photoshop (More information about the different types of rendering intents can be found here). Since the characterization data for ISO Coated V2 (M0) and PSO Coated V3 (M1) have been measured differently, CoPrA’s rendering intents Absolute Compression, Minimum Compression or Absolute Colorimetric may not produce the desired result. However, since the gamut, the color structure and the primary colors of both profiles are very similar, the differences between various types of rendering are rather small.
  5. Exceptions
    Colors such as black, gray, primaries and secondaries can be kept pure by enabling the appropriate checkboxes in the tab Exceptions. CoPrA automatically calculates the most suitable exceptions for a DeviceLink profile based on the selected Rendering intent and the settings for Black Generation. In our example changing the option Automatic is not required. If you would like to adjust exceptions, simply change the Mode from Automatic to Custom (More information about Exceptions can be found here).
  6. Black Generation
    In this tab important settings can be adjusted to define the desired Black Generation. Usually, the goal of a DeviceLink profile is to maintain the black channel or separation characteristics and in most cases the mode Preserve Separation is the best choice. In this case, however, the two profiles are so similar that Preserve Black is the better option.
  7. As shown in the graphic below selecting the option Preserve Black results in only minor modifications of the data. Using this option compensates the tone value difference and the accompanying color difference between both profiles.
  8. Black Point and TAC
    To define the total area coverage (TAC) and the black point (Black-TAC) for your DeviceLink profile, select the option Target Profile from the drop-down menu Black Calculation. This will use the settings for TAC, Black-TAC and Max.Black from the profile and will thus provide a very good starting point for any modifications.
  9. Black TAC
    To set the Black TAC value to exactly 300%, select the Option Balance CMY from the drop-down menu Black Calculation and move the Black TAC slider to exactly 300% or enter 300 in the corresponding number field.
  10. Once all settings have been adjusted, click Next.
  11. Now define the Name of the ICC DeviceLink profile. CoPrA suggests a name based on the setting, the source and the target profile but you can enter a name of your choice (More information about the settings Format and Size can be found here). If you require a detailed profile report simply activate the checkbox Create Profile Report. Once all settings have been adjusted, click Save. Your ICC profile will be created and saved to the user folder for ICC profiles of your operating system.
This entry was posted in Black Generation settings for DeviceLinks, CoPrA4, DeviceLink profile calculation options, DeviceLink Profiling, Exception settings, Rendering settings, Settings for DeviceLink profiling, Source and Target profiles. Bookmark the permalink. Trackbacks are closed, but you can post a comment.

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