Patent ID: 8534821

Claim:
A non-aqueous ink-jet ink comprising a pigment, a pigment derivative having an acid group, a resin for fixing an image, a compound (A) which is at least one selected from the group of dimethyl sulfoxide, diethyl sulfoxide, methyl ethyl sulfoxide, diphenyl sulfoxide, tetraethylene sulfoxide, dimethylsulfone, methyl ethyl sulfone, methyl isopropyl sulfone, methylhydroxyethyl sulfone and sulfolane, and a Solvent (B) which is at least one selected from the group of diethyleneglycol diethyl ether, dioropyleneglycol dimethyl ether, dipropyleneglycol diethyl ether, ethyleneglycol diacetate and propylene glycol diacetate, wherein the resin for fixing an image is produced by a solution polymerization method.