| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an aqueous pigment dispersion solution simultaneously achieving good long-term storage stability, high gloss and good light-resistance in a printed image. <P>SOLUTION: The aqueous pigment dispersion solution comprises (a) C.I. Pigment Green 36, (b) a styrene-acrylic acid copolymer, (c) an alkali metal hydroxide and (d) a wetting agent, 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 6,000 to 40,000, 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. <P>COPYRIGHT: (C)2008,JPO&INPIT |
