Electrophotographic process for preparing printing forms using alkaline
decoater solution
    1.
    发明授权
    Electrophotographic process for preparing printing forms using alkaline decoater solution 失效
    使用碱性分解剂溶液制备印刷版的电子照相法

    公开(公告)号:US4684594A

    公开(公告)日:1987-08-04

    申请号:US905236

    申请日:1986-09-09

    摘要: Printing forms or metallized images can be prepared electrophotographically by a process comprising the electrostatic chargeup, imagewise exposure and tonering of a photoconductor layer applied to an electroconductive base material, followed by fixing of the tonered image areas, removal of the photoconductive layer in the non-image areas by decoating and, where appropriate, etching of the bared base material surface. A recording material is used that comprises a photoconductive layer containing at least one organic n-conducting pigment in a concentration between 10 and 50 percent by weight and an organic p-conducting photoconductor in a concentration of 0 to 20 percent by weight, based on the layer weight, together with a binder which is soluble or dispersible in aqueous-alkaline solution. The decoating is carried out with an aqueous-alkaline decoater solution, which preferably contains alkali metal hydroxides and/or phosphates. The decoating is preferably carried out at an elevated temperature, for example, between about 30.degree. to 60.degree. C.

    摘要翻译: 印刷形式或金属化图像可以通过包括施加到导电基材的感光体层的静电荷,成像曝光和调色的方法进行电子照相制备,然后固定调色图像区域, 图像区域通过旋转和适当时蚀刻裸露的基材表面。 使用记录材料,其包含含有至少一种浓度为10至50重量%的有机导电颜料的光电导层和浓度为0至20重量%的有机p导电光电导体,基于 以及可溶于或分散在碱性水溶液中的粘合剂。 用含碱金属氢氧化物和/或磷酸盐的水性 - 碱性改质剂溶液进行脱色。 脱醇优选在升高的温度下进行,例如在约30至60℃之间。