WATER-BASED PIGMENT DISPERSION FOR INK-JET RECORDING, INK COMPOSITION FOR INK-JET RECORDING AND METHOD OF PRODUCING THE SAME

摘要

A water-based pigment dispersion for ink-jet ink and a method of producing the same, and an ink composition for ink--jet recording comprising the water-based pigment dispersion for ink-jet ink as a main component are provided. A method of producing the water-based pigment dispersion for ink-jet ink comprises a kneading process for kneading a mixture containing a styrene-based resin, a quinacridone-based pigment, a phthalimidomethylated quinacridone-based compound, an alkali metal hydroxide and a humectant to produce a solid and colored kneaded mixture, and a dispersing process for dispersing the solid and colored kneaded mixture in an aqueous medium.