Determining Chromaticness Difference Tolerance of Offset Printing by Simulation

Color printing tolerances in ISO 12647-2 have been specified by TVI and midtone spread. ISO TC130 is contemplating to replace midtone spread by chromaticness difference (?C_h). � In � order � to � find � the � equivalence between midtone spread and ?C_h, this research uses a simulation to generate a large database with print jobs that are in conformity � to midtone � spread � requirements � as well as print � jobs that are not. The results show that the tolerance of 5 midtone spread for a quarter-tone (25C19M19Y) triplet is 1.8 ?C_h. The tolerance of 5 midtone spread for a midtone (50C40M40Y) triplet or three-quarter (75C66M66Y) triplet is 3.2 ?C_h. The finding provides insights into the determination of ?C_h tolerance that aligns with the existing midtone spread tolerance of 5.