PHOTOSENSITIVE PLANOGRAPHIC PRINTING PLASTE

摘要

PURPOSE:To obtain the planographic plate less in malodor malodor and toxicity during/after manufacture and improved in coatabiljty and removal of films and dyes and superior in underdevelopment and film strength by coating a substrate with a specified photosensitive coating solution. CONSTITUTION:The supbstrate is coated with the photosensitive solution containing (a) an o-quinonediazido compound, (b) propyleneglycol 1-4C alkyl ether in the amount of 60-90wt.% of the solid components, (c) 10-25C fatty monocarboxylic acid, and (d) an organic dye espacially changeable in tone by acid. As the quinonediazido compound, the ester compounds of o- naphthoquinonediazidosulfonic acid with the polycondensation product of phenols and aldehydes and/or ketones are enumerated.