HIGH CONTRAST CAUSED BY SEVERAL INHIBITORS ON SILVER HALIDE CTP PRINTING PLATE

doi:10.7517/j.issn.1674-0475.2000.01.42

Abstract

Abstract: High contrast is essential for printing plate technology. In this paper, four inhibitors were introduced into developers for silver halide diffusion transfer system. Their effects on contrast were studied at different concentration of inhibitors by applying CCD technique. It was found that thiosalicylic acid improved the contrast at a wide range of concentration; 2-mercaptobenzithiazole improved the contrast at higher concentration; 6-nitro-benzimidazole and benzotriazole can slightly improve the contrast. And a super-high contrast was obtained when 6-nitro-benzimidazole and thiosalicylic acid were used together. The contrast coefficients were calculated for each inhibitor. An explanation based on development kinetic curves was proposed.

Key words: high contrast, physical development, inhibitor

ZHOU Shuyun, CHEN Ping, HU Xiujie, ZHENG Deshui. HIGH CONTRAST CAUSED BY SEVERAL INHIBITORS ON SILVER HALIDE CTP PRINTING PLATE[J]. Imaging Science and Photochemistry, 2000, 18(1): 42-50.

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