Patent ID: 7790352

Claim:
A lithographic printing plate precursor capable of performing a development and printing by loading on a printing press after imagewise exposure and supplying an oily ink and an aqueous component, the lithographic printing plate precursor comprising a support and an image recording layer, wherein the image recording layer comprises (A) a polymerization initiator, (B) a polymerizable monomer, (C) a binder polymer, which is an acrylic resin having a polyoxyethyl group, (D) a crosslinked resin particle having a reactive group, and (E) an infrared absorbent, and is polymerization-curable upon irradiation of actinic rays from an infrared laser, wherein the binder polymer of component (C) has an ethylenically unsaturated bond, and wherein said lithographic printing plate precursor further comprises an undercoat layer provided between the image recording layer and the support, wherein the undercoat layer comprises a polymer having an ethylenically unsaturated bond in a side chain thereof which is obtained by copolymerizing a monomer having a group adsorptive to the substrate, a monomer having a hydrophilic group and a monomer having an ethylenically unsaturated bond in the side chain thereof.