Production of photosensitive material for lithographic printing plate

Abstract

Abstract PURPOSE:To obtain a photosensitive material for a lithographic printing plate which permits printing with high quality at a low cost without printing staining by providing successively a photosensitive layer and photoconductive insulating layer on a conductive base having a hydrophilic surface and specifying the viscosity of the coating liquids to be used for forming said layers at specific viscosities. CONSTITUTION:The photosensitive layer 11 and the photoconductive insulating layer 10 are provided in this order on the conductive base 13 having the hydrophilic surface. The coating liquids for forming the layers 11, 10 of which at least one has 100cps viscosity are coated thereon. An intermediate layer 12 may be provided between the layer 11 and the layer 10 and >=2 kinds of the coating liquids may be simultaneously coated in lamination. The diffision and mixing of the photoconductive compd., etc. in the layer 10 into and with the other layer since the coating until the formation of the coated films is completed are prevented by specifiying the viscosity of at least one kind of the coating liquids at >=100cps. The effect thereof is additionally improved by providing the layer 12. The simultaneous coating of two kinds of the coating liquids P1, P2, P3 in lamination on the base 3 by extrusion etc. is more preferable. The photosensitive material for the lithographic printing plate having high quality without printing staining is thus obtd. at the low cost.

Inventors

• 👤 Yuzo Inukai
• 👤 祐蔵 犬飼

Bibliographic Details