| 摘要 |
PURPOSE:To obtain a high sensitivity and photographic characteristics stable to again under heating of the planographic printing plate to which a silver salt diffusion transfer method is applied by using a specific polymer compd. as a binder of a physical development nucleus layer. CONSTITUTION:The image receiving layer of the planographic printing plate to which the silver salt diffusion transfer method is applied contains the physical development nuclei consisting of heavy metals or the sulfide thereof and the polymer which contains a functional group exhibiting activity thereto and a substd. trioxylyl group at specific ratios and is expressed by formula I. In the formula I, R1 to R3 denote hydrogen or a lower alkyl group; A denotes the functional group having the affinity to the physical development nuclei and exhibiting the activity thereto and is suitable 5 to 6 members heterocyclic ring including nitrogen. B is the hydrophilic active group, for example, a hydroxyl group, etc. The group expressed by Y is a functional group as a silane coupling agent; X1 and X2 are a bivalent combination group; l is 1 to 20mol%; n is 0.1 to 10mol%, m denotes (100-l-n)mol%. |
