PRINTING PLATE MATERIAL, PREPARING METHOD THEREFOR, RECYCLING METHOD FOR PRINTING PLATE, AND PRINTING MACHINE

摘要

PROBLEM TO BE SOLVED: To recycle a plate material for enabling repeated use thereof and also to attain shortening of an image writing time in a printing process and shortening of a time for recycling a plate.

SOLUTION: This printing plate material enables writing of an image by a light having a wavelength of a visible light or below and preparation of the plate without a wet type developing treatment and besides enables repeated recycling and use of the plate. The material is constituted of a base 1, a photosensitive layer 3 provided on the surface of the base 1 and containing a photocatalyst reacting to the light having a wavelength of a visible light or below and an intermediate layer 2 interlaid between the base 1 and the photosensitive layer 3 and containing a semiconductor or an electric conductor.

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