Patent ID: 7348132

Claim:
A method of processing a lithographic printing plate comprising in order: (a) providing a lithographic printing plate comprising (i) a hydrophilic substrate, (ii) an oleophilic photosensitive layer comprising a polymeric binder, a urethane (meth)acrylate monomer having at least 4 (meth)acrylate groups, a non-urethane (meth)acrylate monomer having at least 4 (meth)acrylate groups, a free radical initiator, and a sensitizing dye, and (iii) a water soluble or dispersible overcoat; (b) exposing said plate with a laser having a wavelength of from 250 to 430 nm at a dosage of less than 300 μJ/cm 2 according to digital imaging information to cause hardening of the photosensitive layer in the exposed areas; and (c) contacting said exposed plate with an aqueous developer or with ink and/or fountain solution to remove the non-exposed areas of the photosensitive layer.