Ink set and ink jet recording method

Details Ink set and ink jet recording method Ink set and ink jet recording method

2008-03-11

2008-03-11

Lorengo, J. A. (Department: 1755)

Compositions: coating or plastic

Coating or plastic compositions

Marking

C106S031600

Reexamination Certificate

active

11076885

ABSTRACT:
An ink set is disclosed that comprises a first ink composition containing a first colorant, and a second ink composition containing a second colorant, wherein the first colorant is different from the second colorant; wherein each ink composition, when printed at 100% fill on the same substrate, produces a color having a hue angle, h°n, and a lightness relative to that of the substrate, ΔL*n, according to:in-line-formulae description="In-line Formulae" end="lead"?h°n=tan−1(b*n/a*n)in-line-formulae description="In-line Formulae" end="tail"?in-line-formulae description="In-line Formulae" end="lead"?ΔL*n=L*substrate−L*nin-line-formulae description="In-line Formulae" end="tail"?wherein n=1 or 2 for the first and second ink compositions, respectively; h°1and h°2differ from each other by no more than 15°; and ΔL*1>ΔL*2. An ink jet printing method that employs the ink set is also disclosed, as well as a printed image prepared with the ink set.

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Shaw, et al., “Smooth Blending of Two Inks of Similar Hue to Simulate One Ink”,SPIE- vol. 5667 (2005) pp. 409-416.
“HP Vivera Ink Technology Backgrounder”, Sep. 2004.

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