Patent ID: 9434848
Filing Date: 2016-09-06
CPC Classification: B41J,B41M,C09D

Claim Text:
1. A process black ink composition for digital offset printing comprising: a cyan colorant comprising a cyan pigment, a magenta colorant comprising a magenta pigment and a yellow colorant comprising a yellow pigment, wherein the process black ink composition comprises a total amount of pigment of at least about 15 wt %, a photo-initiator, a dispersant, and a curable ink vehicle component comprising at least one component selected from the group consisting of a curable monomer and a curable oligomer; wherein the process black ink composition comprises a ratio of the cyan colorant to the yellow colorant of 0.70-0.80:1.0 and a ratio of the magenta colorant to the yellow colorant of 0.90-0.80:1.0, wherein the process black ink composition does not comprise carbon black, and wherein the process black ink further comprises a filler.