abstract |
(57) [Problem] To provide a positive photosensitive lithographic printing plate excellent in stain, printing durability, erasing performance, residual color, printing-out performance, and chemical resistance. SOLUTION: On a hydrophilized aluminum support, an intermediate layer containing a polymer compound having a component having an acid group and a polymer compound having a component having an onium group is provided, and then a positive photosensitive layer is formed. A photosensitive lithographic printing plate provided. |