PROCESSING METHOD OF PHOTOSENSITIVE LITHOGRAPHIC PRINTING PLATE

摘要

PROBLEM TO BE SOLVED: To provide a processing method of a photosensitive lithographic printing plate in which excellent printing contamination resistance can be obtained if liquid exchange is not performed for a long period.

SOLUTION: Provided is a processing method of a photosensitive lithographic printing plate that includes a photopolymerizable photosensitive layer on a substrate and includes an oxygen intercepting layer on a side further away from the substrate than the photopolymerizable photosensitive layer, in which the photosensitive lithographic printing plate is processed with a process liquid containing polyvinyl alcohol decomposing bacteria.

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