公开(公告)号：US3881998A

公开(公告)日：1975-05-06

申请号：US38202673

申请日：1973-07-23

申请人： KANSAI PAINT CO LTD

发明人： MIYOSAWA YUSHIAKI

IPC分类号： B41C1/10 ,  B41N3/08 ,  B41C3/08 ,  B41N1/04 ,  C23B9/02

CPC分类号： B41C1/10 ,  B41N3/08

摘要： This invention relates to a method of after-treatment for lithographic printing plates having an aluminum substratum in order to impart an extended durability for offset printing which comprises passing an electric current through the surface of the non-image area of the aluminum substratum and a counter electrode, particularly with a trend of increasing electric voltage in course of time, in an aqueous solution of oxyacid salt or oxyacid salts after forming a printing element which is oleophilic and electrically non-conductive on the image area of the surface of the aluminum substratum and, if necessary, further processing with an aqueous solution of acid or salt.

摘要翻译： 本发明涉及一种用于具有铝基底的平版印刷版的后处理方法，以赋予胶版印刷延长的耐久性，其包括使电流通过铝底层的非图像区域的表面和计数器 电极，特别是具有随时间增加的电压趋势，在形成在铝基材表面的图像区域上亲油且不导电的印刷元件之后，在含氧酸盐或含氧酸盐的水溶液中， 如果需要，用酸或盐的水溶液进一步处理。