the manufacturing method of the ink composition and aqueous phthalocyanine blue pigment dispersion aqueous phthalocyanine blue pigment dispersion for kneaded products and using the same

摘要

PROBLEM TO BE SOLVED: To provide a technique for giving an aqueous phthalocyanine blue pigment dispersion and an ink composition with a phthalocyanine blue pigment dispersed stably therein(i.e. good in dispersion stability) and sustainably even under long-term storage(i.e. good in long-term storage stability).;SOLUTION: The ink composition is produced by dispersing in a water-miscible solvent a solid or semi-solid kneaded product which is prepared by kneading a mixture comprising an anionic group-bearing resin, the phthalocyanine blue pigment and a basic compound.;COPYRIGHT: (C)2004,JPO