| abstract |
(57) [Summary] [Object] To provide a composition for a printing ink, which is excellent in fluidity, colorability and gloss. A composition for printing ink, comprising an organic pigment and a pigment derivative represented by the general formula (I) in the form of a free acid. [Chemical 1] In the formula, D: an organic pigment residue excluding azo R 1 represents a hydrogen atom, or a saturated aliphatic hydrocarbon group having 1 to 20 carbon atoms, an unsaturated aliphatic hydrocarbon group, or an aromatic hydrocarbon group. R 2 represents a saturated aliphatic hydrocarbon group having 1 to 20 carbon atoms, an unsaturated aliphatic hydrocarbon group or an aromatic hydrocarbon group. m: 0 to 3 n: 1 to 4, where m + n = 1 to 5 |