COLOR DIFFERENTIAL GLOSS SECURITY PRINTING

摘要

Methods and devices identify gloss levels and appearance colors for different printers based on the common printing capabilities of the different printers. Such gloss levels and appearance colors are formed from different combinations of one or more colorant marking materials combined or stacked on a print substrate surface. Further, such methods and devices identify common color metameric pairs based on the gloss levels and the appearance colors. Each of the common color metameric pairs has the same appearance color, but has a different gloss level. Patterns of different gloss levels in an area of uniform appearance color form a differential gloss security feature on a printed document. The methods herein can store a file with the common color metameric pairs in a non-transitory storage medium that is operatively connected to at least one of the different printers.

主权项

1. A method comprising:
identifying gloss levels and appearance colors for different printers based on common printing capabilities of said different printers, said gloss levels and said appearance colors being formed from different combinations of one or more colorant marking materials combined on a print substrate surface; and identifying common color metameric pairs based on said gloss levels and said appearance colors, each of said common color metameric pairs having a same appearance color and a different gloss level and producing a differential gloss security feature when printed adjacent each other, and said differential gloss security feature comprising patterns of different gloss levels in an area of uniform appearance color.