Patent ID: 8287114

Claim:
An aqueous ink composition comprising a colorant, a polymer comprising a hydrophobic structural unit (a) represented by the following formula (1), a polymerization initiator, a polymerizable compound comprising an ethylenically unsaturated bond, and water: wherein, in formula (1), R 1 represents a hydrogen atom, a methyl group or a halogen atom; L 1 represents â€”COOâ€”, â€”COOâ€”, â€”CONR 2 â€”, â€”Oâ€”, or a substituted or unsubstituted phenylene group; R 2 represents a hydrogen atom or an alkyl group having 1 to 10 carbon atoms; L 2 represents a single bond or a divalent linking group having 1 to 30 carbon atoms; and R 3 represents a hydrogen atom, a hydroxy group, an alkyl group, an alkyloxy group, an aryl group, an arylalkyl group, an aryloxy group, an acyl group, a halogen atom, a cyano group, or a nitro group.