Substrate Correction in ISO 12647-2

Currently, ISO 12647-2 (2004) specifies paper color with aim points and tolerances, but does not treat it as a normative  requirement because more and more production papers are out of tolerance. This paper describes a printing experiment to investigate the effect of substrate-corrected colorimetric aims on solid, TVI, as well as on grey reproduction conformance. It concludes that (a) depending on the color of the ink, its ink film thickness, and the color of the paper, overall solid conformance may be improved when substrate-corrected colorimetric aims are used during press make-ready; (b) there is no difference between substrate-corrected TVI aims and target TVI aims; and (c) the tristimulus linear correction can be used to calculate the substrate-corrected grey ramp.