Patent ID: 8362137

Claim:
An ink composition, which is an ink composition for inkjet recording, comprising: a quinacridone pigment dispersion comprising a pigment; and a block polymer comprising a repeating unit including a hetero ring residue or an anthraquinone ring residue of a colorant, wherein the block polymer is an AB block polymer or an ABC block polymer, and the ink composition does not substantially comprise a solvent; wherein the repeating unit is represented by the following Formula (1): wherein, in Formula (1), R 1 represents a hydrogen atom or a methyl group; J represents —CO—, —COO—, —CONR 2 —, —OCO— or a phenylene group; R 2 represents a hydrogen atom, an alkyl group, an aryl group or an arylalkyl group; W represents a single bond or a divalent linking group; and P represents a hetero ring residue formed by removing one hydrogen atom from acridone or an anthraquinone ring residue formed by removing a hydrogen atom from anthraquinone.