Patent ID: 7033423
Filing Date: 2006-04-25
Classification: B41J,C09D

Abstract:
1. An ink or set of inks for ink-jet printing, selected from the group consisting of: a light gray ink, a medium gray ink, a dark gray ink and combinations thereof; each ink comprising a black colorant and a yellow colorant; and wherein the light gray ink has a hue range of 250°–310°, a chroma range of less than 6, and an L* range of 54–72; the medium gray ink has a hue range of 250°–310°, a chroma range of less than 6, and an L* range of 30–47; and the dark gray ink has a hue range of 150°–270°, a chroma range of less than 6, and an L* range of 10–18; and when two or three of the light gray, medium gray and dark gray inks are printed together, a gray color results having a hue range of 250°–310° and a chroma range of 2–6.