Patent ID: 7307109

Claim:
An ink jet recording ink containing: a colorant of a pigment and/or dye enveloped in a polymer and water, and containing at least one compound selected from the group consisting of acetylene glycol surfactants and acetylene alcohol surfactants, and at least one other compound comprising at least one 1, 2-(C 4-10 alkyl)-diol and, optionally, a glycol ether, wherein the polymer that envelops the pigment and/or dye is a copolymer of a polymerizable group-having dispersant and a copolymerizable monomer, wherein the polymerizable group-having dispersant is a polymerizable surfactant having at least a polymerizable group, a hydrophobic group and a hydrophilic group in its molecular structure, and wherein the polymerizable surfactant is a compound of the following formula (II): wherein R′ represents a hydrogen atom or a hydrocarbon group having from 1 to 12 carbon atoms; n indicates a number falling between 2 and 20; M represents an alkali metal, an ammonium salt, or an alkanolamine.