| 摘要 |
PROBLEM TO BE SOLVED: To provide a photosensitive composition for IR laser for direct plate making having a stable state before development, excellent in handleability and chemical resistance and excellent also in the solubility of the exposed part in an alkali developing solution. SOLUTION: The photosensitive composition contains (a) a material which absorbs light and generates heat and (b) a resin soluble in an alkaline aqueous solution and having a structural unit of formula 1, wherein A is H, a halogen or a 1-4C alkyl and R is a 1-6C alkyl, a 1-6C alkoxy or halogen. Preferably the composition further contains (c) a resin soluble in the alkaline aqueous solution and having a phenolic hydroxyl group. |
