| 摘要 |
PROBLEM TO BE SOLVED: To omit heating after exposure and to improve printing durability and soiling resistance. SOLUTION: As for this processing method; a photosensitive planographic printing plate constituted by successively laminating a photopolymerizable photosensitive layer whose film thickness is 1.2 to 4 g/m<2> and a protective layer whose film thickness is 2 to 8 g/m<2> on a supporting body whose center line average roughness (Ra) is >=0.35μm is developed with developer incorporating alkali metal silicate after laser exposure, and then exposed all over the surface. |
