| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a photosensitive lithographic printing plate in which printing durability can be greatly improved and enough erasability can be obtd. while preventing deterioration of the erasability with an erasing liquid in a correcting process, of scumming resistance of the erased part during printing and of scumming resistance in a non-picture part, and further, in which the amt. of Si deposited by development is suppressed to 0.5 to 5.0 mg/m2 and the erasability on the plate can be further improved. SOLUTION: This printing plate has an intermediate layer and a photosensitive layer on an aluminum supporting body subjected to an anodic oxidation treatment or further to a sealing treatment. The intermediate layer contains an alkali-soluble polymer controlled to have 300 to 5000 number average mol.wt. (Mn) by using a chain initiator and a chain transfer agent together during radical polymn. The photosensitive layer is disposed on the intermediate layer and contains a resin having urethane bonds.</p> |
