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Learn about color validation tests
Digital print certification
The available pre-defined, industry standard color validation tests meet one or the following
digital print certifications.
1. DPC: IDEAlliance Digital Press Certification
2. VPC: FOGRA Validation Printing System Certification
3. PSD: FOGRA Print Standard Digital Certification
Evaluation methods
The traditional side-by-side evaluation method checks if printed colors exactly match the colors of
the reference printing condition. The media relative evaluation takes into account that the paper
white values of the printed media and the reference media can be different. Therefore, the media
relative method uses a non-linear algorithm to compensate for the different white points. The
SCCA (Substrate-Corrected Colorimetric Aims) evaluation method, used by IDEAlliance tests, is
also based on the media relative evaluation.
Target charts
The color validation test prints target charts for the selected media/media print mode
combination. You measure the target charts when they are dry. The type of target chart belongs
to the definition of the color validation test or the profile accuracy test. The charts must be printed
on the media that you are evaluating.
For custom color validation tests you can select one of the following charts.
1. PRISMAsync Media Wedge
2. IDEAlliance Control Wedge 2011
3. IDEAlliance Control Wedge 2013
[310] PRISMAsync Media Wedge
Patches of the target chart
The patches of the target charts represent primary colors, secondary colors, grays, and other
color mixes. The following patch names are part of the metrics that are part of the tests.
Example
248
Chapter 9 - Print what you expect
Description
A composite gray patch is a patch where K ink is not used. Instead,
Y, M and C are used to darken the colors. M and Y have the same
value.
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