| 摘要 |
PROBLEM TO BE SOLVED: To provide a planographic printing plate for an infrared laser excellent in age stability of a flaw. SOLUTION: The planographic printing plate is obtained by disposing a heat sensitive layer comprising (A) a material which absorbs light and generates heat, (B) a resin soluble in an aqueous alkali solution and having phenolic hydroxyl groups and (C) a compound having 2-12 groups of the formula -R<1> -Y- CO-X-R<2> (where X is O, S or NR<3> ; Y is NR<3> or a single bond; R<1> is a 1-32C alkylene or arylene; and R<2> and R<3> are each H or a 1-18C alkyl, alkenyl or aryl). |
