| 摘要 |
PURPOSE:To obtain a planographic printing plate having excellent stain resistance and using a silver complex salt diffusion transfer process. CONSTITUTION:When a substrate is successively coated with at least one undercoat layer, a silver halide emulsion layer and physical developing nuclei to obtain a planographic printing plate, a matting agent of <=5mum average particle diameter is incorporated into a coating layer on the emulsion layer side of the substrate by 0.1-2.0g/m<2> and the center line average roughness Ra of the planographic printing plate is regulated to <=1.2. |
