Patent ID: 7985784

Claim:
An ink set comprising: a black ink composition including a self-dispersing pigment and a resin emulsion, the resin emulsion being formed from a mixture of resin particulates that form a film-like structure at a temperature of 40° C. or lower, and resin particulates that do not form a film-like structure at a temperature of 40° C. or lower, a yellow ink composition including an organic pigment covered with a water-insoluble polymer and a resin emulsion, the resin emulsion contained in the yellow ink composition being formed from a water insoluble polymer that does not form a film-like structure at a temperature of 40° C. or lower, a magenta ink composition including an organic pigment covered with a water-insoluble polymer and a resin emulsion, and a cyan ink composition including an organic pigment covered with a water-insoluble polymer and a resin emulsion wherein each of the resin emulsions contained in the magenta ink composition and in the cyan ink composition is formed from a polymer that forms a film like-like structure at a temperature of 40° C., wherein each of the resin emulsions contained in the magenta ink composition and in the cyan ink composition is formed from a polymer obtained by polymerizing the same monomers as those of the water-insoluble polymer of the magenta and cyan inks respectively, and wherein each of the resin emulsions contained in the magenta ink composition, and in, the cyan ink composition is formed from a block copolymer resin that is composed of monomers each having a hydrophobic group and monomers each having a hydrophilic group and contains at least a monomer having a salt formation group.