Patent ID: 6030750
Filing Date: 2000-02-29
Classification: B41C,B41M

Abstract:
A method for making a lithographic printing plate comprising the steps of:(1) image-wise exposing to light an imaging element comprising (i) an image forming layer comprising hydrophobic thermoplastic polymer particles capable of coalescing under the influence of heat and dispersed in a hydrophilic binder wherein the image forming layer is on a hydrophilic surface of a lithographic base and (ii) a compound capable of converting light to heat, said compound being included in said image forming layer or a layer adjacent thereto;(2) and developing a thus obtained image-wise exposed imaging element by mounting it on a print cylinder of a printing press and supplying an aqueous dampening liquid and subsequently ink to said image forming layer while rotating said print cylinder, wherein said image-wise exposure is carried out by a laser, a LED or a plurality of lasers.