Patent ID: 7199903
Filing Date: 2007-04-03
Classification: G01J,G01N,H04N

Abstract:
1. A method to predict a color of an overprint of a set of colorants at a set of respective coverage percentages on a substrate of a substrate type using a printing technique, the method comprising the steps of: providing one or more device profiles for one or more subsets of the set of colorants for printing on the substrate with the printing technique; determining a first set of colorant parameters of the device profile colorants of the subsets; determining a spectrum of the substrate; providing a second set of colorant parameters of non-device profile colorants; determining the color of the overprint from said first and second colorant parameters, wherein said first and second sets of colorant parameters characterize said colorants as a function of at least a coverage percentage and a wavelength; and modifying data of the one or more device profiles such that the colorant parameters determined in the step of determining colorant parameters determines the colorant parameters of modified colorants that match a color of the respective device profile colorants and that cover at least a gamut of the respective device profiles.