| 摘要 |
PURPOSE:To prevent the sticking of plates to each other even when the plates are stacked without inserting slip sheets therebetween at a temp. above the room temp. and even after lapse of a long period while the plates are held exerted with pressure by incorporating a surface active agent contg. a perfluoroalkyl group and a substituent contg. phosphorus atoms into a photosensi tive compsn. layer. CONSTITUTION:This photosensitive lithographic printing plate contains the surface active agent having the perfluoroalkyl group and the substituent contg. phosphorus atoms into the photosensitive compsn. The perfluoroalkyl group refers to the perfluoroalkyl group in which >=50% of the hydrogen atoms bound with the carbon atoms of the hydrophobic group of an ordinary surface active agent is substd. with fluorine atoms. The more particularly preferable using range of the surface active agent is where the effective components thereof are 0.1-2wt% of the photosensitive compsn. The substantially high effect is not obtainable if the ratio thereof is less than 0.05wt% and an adverse influence is exerted to printing performance such as inking property and printing resis tance if the ratio is higher than 10wt%. |
