POSITIVE TYPE PHOTOSENSITIVE COMPOSITION AND POSITIVE TYPE PHOTOSENSITIVE PLANOGRAPHIC PRINTING PLATE

摘要

PROBLEM TO BE SOLVED: To provide a photosensitive composition which does not deposit a triazine compound in a developing solution, is excellent in developability and has good sensitivity, thin line reproducibility and printing resistance and a photosensitive planographic printing plate. SOLUTION: The positive type photosensitive composition contains a di(trihalomethyl)-s-triazine derivative which is photodegraded and generates a radical or an acid and an o-quinonediazido compound. The di(trihalomethyl)-s- triazine derivative is a di(trihalomethyl)-s-triazine compound having a carboxy group and/or a phenolic hydroxyl group in its structure.