Process for the preparation of printing forms

Details Process for the preparation of printing forms Process for the preparation of printing forms

H - Electricity

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117/2.2

H05K 3/12 (2006.01) G03G 9/09 (2006.01) G03G 9/097 (2006.01) G03G 13/28 (2006.01) G03G 13/32 (2006.01)

Patent

CA 1046866

ABSTRACT OF THE DISCLOSURE This invention relates to an improvement in the process for the preparation of printing forms or metallic etchings from electrophoto- graphic or electrographic reproduction materials composed of a support with a photoconductive or high-ohmic layer thereon, by charging and image-wise exposure, or by image-wise charging, development of the electrostatic image with a finely-divided toner, fixing, and removal of the layer in the image-free areas by means of a decoating solution, the improvement comprising developing the electrostatic image with a developer which reacts at least superficially with the image areas at room temperature, thereby simultaneously effecting development and resistance to the decoating solution, or developing the electrostatic image with a developer which reacts with the decoating solution and thereby deactivates it in the image areas.

198311

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