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    • 80. 发明授权
    • Negative-working dry planographic printing plate
    • 负性干式平版印刷版
    • US6045963A
    • 2000-04-04
    • US40163
    • 1998-03-17
    • Jianbing HuangRichard GoodmanThi Do
    • Jianbing HuangRichard GoodmanThi Do
    • G03F7/00G03F7/023G03F7/035G03F7/075G03F7/32G03F7/30
    • G03F7/0233G03F7/0752
    • A negative waterless plate contains a sheet substrate; a radiation sensitive imaging layer composed of a diazido naphthaquinone ester or amide compound, such as diazido naphthaquinone sulfonate of a phenolic resin, and a polyurethane prepared by reacting a di-isocyanate and a diol; and a silicone layer. The planographic printing plate is imagewise exposed to actinic radiation through a negative original to form exposed areas of the imaged layer which are soluble or dispersible in a developer liquid. After imaging exposure, the developer liquid is applied which penetrates the silicone layer and dissolves the areas exposed to the radiation. The coating areas not exposed by the radiation remain intact. During this development procedure, areas of the silicone layer overlying the exposed areas are removed along with the underlying soluble areas to produce an imaged planographic printing plate having uncovered ink receptive areas and complimentary ink repellent areas of the silicone layer. In use, the developed plate is mounted on a dry planographic printing press containing only a lithographic ink; and used to print a positive image on conventional print stock.
    • 负无水板包含片状基材; 由二叠氮基萘醌酯或酰胺化合物如酚醛树脂的二叠氮基萘醌磺酸盐和通过二异氰酸酯和二醇反应制备的聚氨酯组成的辐射敏感成像层; 和硅树脂层。 平版印刷版通过阴性原件成像曝光于光化辐射,以形成可溶或可分散在显影液中的成像层的暴露区域。 在成像曝光后,施加渗透硅氧烷层并溶解暴露于辐射的区域的显影液。 未被辐射暴露的涂层区域保持完整。 在该显影过程中,覆盖曝光区域的硅氧烷层的区域与下面的可溶性区域一起被去除以产生具有未覆盖的墨接受区域和硅氧烷层的互斥墨水排斥区域的成像平版印刷版。 在使用中,显影板安装在仅包含平版印刷油墨的干性平版印刷机上; 并用于在常规打印纸上打印正面图像。