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    • 3. 发明授权
    • Electrophotographic lithographic printing plate
    • 电子照相平版印刷版
    • US5342784A
    • 1994-08-30
    • US864946
    • 1992-04-07
    • Jun YamadaSeiji Shinohara
    • Jun YamadaSeiji Shinohara
    • G03G5/05G03G5/10G03G13/28
    • G03G13/28G03G5/0525G03G5/10
    • Provided is an electrophotographic photoreceptor which comprises an electrically conductive support and a photoconductive layer comprising at least an organic photoconductive compound and an alkali and/or alcohol soluble binder resin provided on said support and which is used for making a lithographic printing plate therefrom by electrophotographically forming a toner image and decoating the photoconductive layer of non-image portion other than the toner image portion by contacting with an alkaline decoating solution, wherein an arithmetical mean deviation of profile (Ra.sub.1) of the surface of said electrically conductive support having said photoconductive layer thereon is 0.3-1.0 .mu.m and a ratio of Ra.sub.2 /Ra.sub.1 of an arithmetical mean deviation of profile (Ra.sub.2) of the surface of said photoconductive layer and the (Ra.sub.1) is 0.5-1.0. The image formed on the printing plate is free from indentation at the edge of the image. Resolution and sharpness of the image are improved.
    • 本发明提供一种电子照相感光体,其包含导电性支持体和光电导层,该光电导层至少含有有机光电导性化合物和设置在所述载体上的碱溶性和/或醇溶性粘合剂树脂,用于通过电子照相法形成平版印刷版 调色剂图像,并通过与碱性去油溶液接触来除去调色剂图像部分以外的非图像部分的光电导层,其中所述导电载体的表面的轮廓(Ra1)的算术平均偏差在其上具有所述光电导层 为0.3-1.0μm,并且所述光电导层的表面和(Ra1)的轮廓(Ra2)的算术平均偏差的Ra2 / Ra1的比率为0.5-1.0。 形成在印版上的图像在图像的边缘处没有压痕。 图像的分辨率和锐度提高。