【摘要】 高反差是印刷用感光材料的重要特性 .本文着重研究了 4种化学显影抑制剂对银盐扩散转移型CTP版材反差的影响 .结果发现 ,硫代水杨酸、2 巯基苯并噻唑、6 硝基苯并咪唑和苯并三氮唑等单独使用时 ,对版材反差都有不同程度的提高作用 ;而硫代水杨酸与 6 硝基苯并咪唑配合使用时 ,得到了超高反差效果 .通过计算 ,给出了各个抑制剂最佳浓度时的反差系数值 .另外 ,利用线性CCD技术对物理显影过程的研究表明 ,添加抑制剂扩大了不同曝光级的显影诱导期和显影速率之间的差别 ,从而提高了反差 .更多还原

【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.更多还原