| 摘要 |
PROBLEM TO BE SOLVED: To provide: a process black ink that does not comprise carbon black; a method of preparing the present process black ink composition; and a method of using the process black ink composition.SOLUTION: This invention relates to a process black ink composition for digital offset printing, including a cyan colorant including a cyan pigment, a magenta colorant including a magenta pigment and a yellow colorant including a yellow pigment, wherein the process black ink composition includes a total amount of pigment of at least about 15 wt %, a photo-initiator, a dispersant, and a curable ink vehicle component including at least one component selected from a curable monomer or 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, and wherein the process black ink composition does not comprise carbon black.SELECTED DRAWING: None |
