| abstract |
(57) [Summary]n[Purpose] Serique suitable for the environment and handling safety It is compatible with low pH developer that does not Image with strong adhesion to the aluminum plate and improved printing durability It is to provide a positive lithographic printing plate that is free of stains.n[Constitution] Anodizing treatment, followed by hydrophilic treatment Sulfuric acid or acid sulfate, or Zirconium compound and R 1 (PO (OH) 2 ) n Also Is R 1 (PO (OH) (R 2 )) n Compound represented by (N is 1 or 2, when n is 1, R 1 , R 2 Is alkyl, Alkoxy, aryloxy, aryl, acyl, acylo Represents xy and n is 2 R 1 Is alkylene, arylene Represents R 2 Is provided with a subbing layer containing the above definition), Positive feeling characterized by providing a positive photosensitive layer on it Light lithographic printing plate. |