Patent ID: 6686127
Filing Date: 2004-02-03
Classification: B41C,G03F,Y10S

Abstract:
A plate-making method for processing a waterless lithographic printing plate precursor, which method comprises:(I) an exposing step of imagewise exposure of the precursor with a laser such that portions of a laser-exposed area in a photo-thermal conversion layer in the precursor remain in the photo-thermal conversion layer of the finished printing plate; and (II) a developing step of removing a silicone rubber layer in the laser-exposed area to form an image on the printing plate, wherein the precursor to be processed comprises: (A) a support; (B) an undercoat layer formed by applying onto the support a coating liquid that contains a water-dispersible polymer and water as a solvent, and then drying the coating liquid; (C) a photo-thermal conversion layer which comprises polyurethane and a photo-thermal converting agent; and (D) a silicone rubber layer, laminated in that order.