PLANOGRAPHIC PRINTING PLATE

摘要

PURPOSE:To provide a planographic printing plate having an aluminum plate as a supporting body which uses silver complex diffusion transfer method and has excellent picture quality and printing durability. CONSTITUTION:This planographic printing plate has physical development nuclei between an aluminum supporting body which is roughened and anodically oxidized and a silver halide emulsion layer. This printing plate has pits having 0.03-0.30mum diameter by >=500 pieces/100mum<2>. The average particle size of silver halide emulsion particles is 0.2-0.6mum and 90wt.% of the whole silver halide emulsion particles have within 30% of the average particle size.