AQUEOUS PIGMENT DISPERSION SOLUTION, INK FOR INK-JET RECORDING, AND PROCESS FOR PRODUCTION OF AQUEOUS PIGMENT DISPERSION SOLUTION

摘要

Disclosed are: an ink for ink-jet recording, having good long-term storage stability, high gloss and good light-resistance in a printed image; an aqueous pigment dispersion solution for use in the production of the ink; and a process for production of the aqueous pigment dispersion solution. Specifically, disclosed are: an aqueous pigment dispersion solution comprising C.I. Pigment Green 36 (a), a styrene-acrylic acid copolymer (b), a basic compound (c) and a wetting agent (d), wherein the styrene-acrylic acid copolymer (b) has a styrene monomer unit in an amount of 60% by mass or more relative to the total amount of the monomer components, has an acid value of 120 to 240, and has a weight average molecular weight of 6000 to 40000, and wherein the mass-based ratio between the amount of the component (b) and the amount of the component (a) (i.e., a (b)/(a) ratio) ranging from 0.15 to 0.25; an ink for ink-jet recording, mainly comprising the aqueous pigment dispersion solution; and a process for the production of the aqueous pigment dispersion solution, comprising the step of kneading the above-mentioned raw materials.