Production relief copies by subjecting an exposed...

Details Production relief copies by subjecting an exposed... Production relief copies by subjecting an exposed...

G - Physics

03

F

96/266

G03F 7/38 (2006.01)

Patent

CA 1183382

ABSTRACT OF THE DISCLOSURE A process for producing relief copies wherein the light-hardenable layer of a light- hardenable copying material, which contains a photopo- lymerizable mixture, a photodimerizable polymeric compound or a diazonium salt polycondensation product, is exposed to a light image, the exposed layer is sub- jected to a brief ultrasonic treatment, and the unex- posed areas of the layer are thereafter washed away by means of a developer. As a result of the ultrasonic treatment, shorter exposure times may be used and better in-depth hardening of the layer may be achieved.

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