| abstract |
Provided are a black ink composition not containing carbon black, a method for producing the process black ink composition, and a method for using the process black ink composition. A process black ink composition for digital offset printing comprising a cyan colorant including a cyan pigment, a magenta colorant including a magenta pigment, and a yellow colorant including a yellow pigment, and the process black ink The composition comprises a total amount of about 15 wt% or more of a pigment, a photoinitiator, a dispersant, and a curable ink color developer component including one or more components selected from a curable monomer and a curable oligomer. The ink composition has 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. A process black ink composition comprising 0, and the process black ink composition does not contain a carbon book. [Selection figure] None |