| abstract |
A pigment dispersion is disclosed whichncomprises a pigment, a pigment dispersant, and optionallyna binder resin, wherein the pigment dispersion comprisesnas the pigment dispersion at least 0.2 parts by weight ofna modified novolak resin (A) and/or a graft copolymer (B)nrelative to 100 parts by weight of the pigment, thenmodified novolak resin (A) and the graft copolymer (B)neach having an aromatic ring and a ring structure given bynring opening of an epoxy group by a carboxyl group of anhydroxycarboxylic acid or a derivative thereof. An inkncomposition for offset printing containing the pigmentndispersion is also disclosed. |