Process for preparing printing forms

Details Process for preparing printing forms Process for preparing printing forms

G - Physics

03

G

101/41

G03G 13/26 (2006.01) G03G 5/05 (2006.01) G03G 5/06 (2006.01) G03G 13/28 (2006.01) H05K 3/06 (2006.01)

Patent

CA 1262073

ABSTRACT OF THE DISCLOSURE Printing forms or metallized images can be pre- pared 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 concentra- tion 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 con- tains alkali metal hydroxides and/or phosphates. The decoating is preferably carried out at an elevated tem- perature, for example, between about 30° to 60°C.

517864

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