Patent ID: 6479217
Filing Date: 2002-11-12
Classification: G03F

Abstract:
A method for producing a printing plate from a photosensitive recording element comprising the steps of:(a) providing a photosensitive recording element containing a photopolymerizable recording layer having a front surface and a back surface wherein said recording layer comprises: a photopolymerizable monomer, a radical photoinitiator, a color photoinitiator and a color former; (b) exposing the back surface of said photopolymerizable recording layer to a first dose of actinic radiation thereby forming a cured back surface on said recording layer; (c) imagewise exposing the front surface of said photopolymerizable recording layer to a second dose of actinic radiation thereby forming exposed and unexposed areas on the front surface of said recording layer wherein the exposed areas are cured by exposure to the actinic radiation; and (d) removing the unexposed areas of the imagewise exposed recording layer thereby forming an image in relief; wherein the image and the cured back surface of the recording layer provide a visually detectable color contrast.