Patent ID: 8511812

Claim:
An aqueous ink composition comprising (A) a colorant, (B) a polymer including a hydrophobic structural unit (a) represented by Formula (1) below, (C) a polymerization initiator, (D) a polymerizable compound including an ethylenically unsaturated bond, and (E) water, wherein, in Formula 1, R 1 represents a hydrogen atom or a methyl group; R 2 represents a hydrogen atom, an alkyl group, an alkyloxy group, an acyl group, or a halogen atom; L 1 represents a single bond, or a divalent linkage group including at least one selected from a linkage group consisting of an alkylene group having from 1 to 12 carbon atoms, an alkenylene group having from 2 to 12 carbon atoms, an alkyl ether group having from 2 to 6 carbon atoms, —CONR 3 —, and —COO—; R 3 represents a hydrogen atom or an alkyl group having from 1 to 6 carbon atoms; and Ar represents a monovalent group derived from a condensed-ring type aromatic compound having 8 or more carbon atoms, a monovalent group derived from a heterocyclic compound in which aromatic rings are condensed, or a monovalent group derived from a compound in which two or more benzene rings are connected.