abstract |
[PROBLEMS] A positive type which prevents dissolution of an anodic oxide film during development, eliminates whitening of non-image areas and stains on standing, and exhibits high sensitivity and excellent printing durability. Achieve a photosensitive lithographic printing plate. SOLUTION: A layer containing a polymer compound having a specific structural unit as a copolymer component is provided on an aluminum plate which has been subjected to a surface roughening treatment, an anodic oxidation treatment and then a hydrophilic treatment, and then a photosensitive layer. A positive photosensitive lithographic printing plate characterized by comprising: |