Patent ID: 8399541

Claim:
An active energy ray-curable ink composition comprising a coloring agent, a binder resin, and a radically polymerizable varnish and/or a radically polymerizable monomer as main components; wherein said coloring agent is a modified pigment obtained by polymerization, wherein a pigment (A), a nonaqueous solvent and an acrylic resin (B-1) containing a polymerizable unsaturated group are mixed to form a mixture, and at least one kind of polymerizable unsaturated monomer (C), which is a multifunctional polymerizable unsaturated monomer, is further mixed to the mixture to form a polymer on the pigment (A), wherein the polymer is obtained by cross-linking between the acrylic resin (B-1) and the multifunctional polymerizable unsaturated monomer, or cross-linking between the acrylic resin (B-1) and a polymer generated by polymerization of the multifunctional polymerizable unsaturated monomer.