PHOTOPOLYMERIZABLE PHOTOSENSITIVE MATERIAL AND PHOTOSENSITIVE LITHOGRAPHIC PRINTING PLATE

摘要

PROBLEM TO BE SOLVED: To provide a photosensitive lithographic printing plate using a photopolymerizable photosensitive material and having an excellent carrying property without requiring an interleaving paper even in an automatic carrying and exposure apparatus by preventing a protective layer formed on a photosensitive layer from peeling off from the photosensitive layer.

SOLUTION: The photopolymerizable photosensitive material is produced by successively applying/drying a photosensitive layer containing the following photopolymerizable composition on a supporting body and then a protective layer containing a water-soluble polymer on the photosensitive layer. The photopolymerizable composition contains (1) a photopolymerization initiator, (2) a sensitizing dye having the absorption wavelength in the region from 350 to 1000 nm and (3) a fluorine-based surfactant. The peeling strength of the protective layer against the photosensitive layer both after applying/drying is ≥3.5 g/mm.

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