| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a positive photosensitive lithographic printing plate material which retains good developability and has excellent printing durability. <P>SOLUTION: The positive photosensitive lithographic printing plate material has a lower image forming layer containing an alkali-soluble resin, an acid decomposable compound and an acid generator on an aluminum support, and has an upper image forming layer containing an alkali-soluble resin on the lower image forming layer, wherein the lower image forming layer contains a copolymer containing a repeating unit represented by general formula (1) as the alkali-soluble resin. <P>COPYRIGHT: (C)2009,JPO&INPIT |
