| 摘要 |
PURPOSE:To enhance printability and storage stability with time lapse by mixing a specified amount of specified compound. CONSTITUTION:The photosensitive layer containing an acrylic copolymer having hydroxy groups and carboxy groups, the organic acid salt of a diazo resin, and a dye, for forming the plano-graphic printing plate further contains the acid-photogenerating compound represented by formula I in an amount of 0.3-10wt.%. This compound is embodied by trichloromethyl phenylsulfonate, tribromophenylsulfonate, and trichloromethyl 2,4-dichlorophenylsulfonate. In the formula I, R is optionally substituted alkyl, such aryl, or a heterocyclic group, and each of X1-X3, is halogen, thus permitting a printed image to be sharp and storage stability to to be enhanced. |
