LITHOGRAPHIC PRINTING PLATE MATERIAL AND METHOD FOR MANUFACTURING LITHOGRAPHIC PRINTING PLATE

PROBLEM TO BE SOLVED: To provide a lithographic printing plate material with improved printability (antifouling resistance and water tolerance), plate wear and chemical resistance, a lithographic printing plate material capable of on-machine development, a method for manufacturing the lithographic printing plate, a lithographic printing plate material having both good on-machine developing properties and plate wear, and a method for manufacturing the lithographic printing plate. SOLUTION: The lithographic printing plate material is coated with a photo-sensitive layer or a thermo-sensitive layer on a substrate, and in this lithographic printing plate material, a coated face with the photo-sensitive layer or the thermo-sensitive layer on the substrate satisfies the following necessary conditions (a) and (b). (a) There exists a bowl-like recess on the coated face with the photo-sensitive layer or the thermo-sensitive layer, and there exist 50-1,000 pieces/1 μm2holes with a mean diameter of 10-100 nm on the bottom face of the recessed part. (b) The peak strength of phosphorus on the surface of the substrate by a wave dispersion-type X-ray measurement is 10-25 Kcps. COPYRIGHT: (C)2008,JPO&INPIT