| 摘要 |
PURPOSE:To shorten the time for etching by revolving at least one revolving brush of two pieces of the revolving brushes in the direction opposite from the revolving direction of the other revolving brush. CONSTITUTION:Toner images are formed by an electrophotographic method on the photoconductor layer of the planographic printing plate provided with the photoconductor layer contg. the photoconductive material of a pigment system on a metallic base subjected to surface roughening. The revolving brush, for example, the brush roll of 30 to 150mm outside diameter implanted with single yarn consisting of nylon and having 30 to 300mum diameter to 5 to 25mm hair length is used at the time of the processing to remove the photoconductor layer of the non-image parts by at least two pieces of the revolving brushes. At least one roll is revolved in the same direction of the transporting direction of the planographic printing plate and at least one of the other roll is revolved in the direction opposite from the planographic printing plate. The time required for removing the photoconductor layer of the non-image parts is shortened in this way. |
