A recording liquid capable of giving a printed matter which is high in printing density, is suppressed in blur, has high printing quality, and has good fastness of a recorded matter including light fastness, water fastness and the like and having a low viscosity, good discharge properties and excellent storage stability. The invention is concerned with a polyvinyl alcohol based block copolymer represented by the following general formula (1), a pigment dispersion aqueous liquid containing this polyvinyl alcohol based block copolymer and a pigment in an aqueous medium, and a recording liquid containing this pigment dispersion aqueous liquid.
wherein A, B, X
1
, X
2
, X
3
, X
4
, m1, and m2 have the same meanings as defined in the specification.
一种记录液,能够得到印刷密度高、抑制模糊、印刷质量高、记录物牢度(包括耐光牢度、耐
水牢度等)好、粘度低、放电性能好、储存稳定性好的印刷品。本发明涉及一种由以下通式(1)表示的聚
乙烯醇基嵌段共聚物,一种在
水介质中含有该聚
乙烯醇基嵌段共聚物和
颜料的
颜料分散
水基液,以及一种含有该
颜料分散
水基液的记录液。
其中 A、B、X
1
, X
2
, X
3
, X
4
m1 和 m2 的含义与规范中的定义相同。