| 摘要 |
PURPOSE:To provide a useful coupling agent to obtain a stable printing plate for aging with high sensitivity, in a planographic printing plate applied a silver complex salt diffusion transfer process. CONSTITUTION:The planographic printing plate uses a polymer compound represented by a formula as the coupling agent of a physical development seed layer, In the formula, R<1> and R<2> represent a hydrogen atom or a lower alkyl group A represents an ethylenically unsaturated monomer, l,m,n representing mol%, 1 is 99.9-40 mol%, m is 0.1-10mol%, and n is 0-50mol%. |
