PS plate for use in making lithographic printing plate requiring no dampening water.

摘要

The present invention relates to a prsensitized plate for use in making a lithographic plate requiring no dampening water and comprising, on a support, a light-sensitive resin layer and a silicone rubber layer, in this order, wherein the silicone rubber layer is crosslinked by addition reaction of an @SiH group with a -CH=CH- group and wherein the light-sensitive resin layer comprises: (1) a monomer or olygomer having at least one photopolymerizable or photo-crosslinkable and olefinically unsaturated double bond, (2) an organic solvent-soluble polyurethane resin having a glass transition temperature of 20 DEG C or below and being capable of forming a film, and (3) a photopolymerization initiator. According to the present invention, the PS plate has excellent image-forming properties and printing properties.