Patent ID: 8110617

Claim:
An aqueous ink composition comprising: a pigment, having a particle diameter as determined by the light scattering method of no less than 20 nm and no more than 200 nm; and a water dispersible polymer, having a styrene-equivalent number average molecular weight as determined by gel permeation chromatography of no less than 5000 and no more than 200000, wherein said water dispersible polymer is formed from monomers comprising a carboxylic-group- containing monomer, and either a benzyl acrylate monomer, a benzyl methacrylate monomer or both, wherein a total of the benzyl acrylate and benzyl methacrylate monomers in the water dispersible polymer is no less than 40 weight % and no more than 80 weight % of a total weight of the monomers; a 1,2-alkyldiol, having 5 to 8 carbons; and an alkylene glycol monoalkyl ether, with an alkyl moiety of 4 to 10 carbons and an alkylene glycol moiety having no more than 10 repeating units.