LITHOGRAPHIC PRINTING ORIGINAL PLATE

摘要

PROBLEM TO BE SOLVED: To provide a lithographic original plate which has high adhesiveness between a hydrophilic layer and an image forming layer after an image is formed and which is excellent in printing durability so that a great number of prints with high picture quality having no dirt in a non-image part can be obtained even under severe printing conditions.

SOLUTION: The original plate is characterized in that it has a surface layer having hydrophilic graft chains directly bonded to the surface of a supporting body and an image forming layer successively layered on the supporting body, and reactive groups which can be bonded to each other by heat or irradiation of radiation are incorporated into the surface layer and the image forming layer.

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