Method for obtaining a lithographic plate

Radiation imagery chemistry: process – composition – or product th – Transfer procedure between image and image layer – image... – Diffusion transfer process – element – or identified image...

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430244, 430494, 355 55, G03C 707, G03C 834, B41C 110

Patent

active

056164459

ABSTRACT:
A method for making a lithographic printing plate according to the silver salt diffusion transfer process image-wise exposes an imaging element with a high intensity short time scanning exposure. The imaging element comprises on a support in the order given a silver halide emulsion layer and a layer containing physical development nuclei. A thus obtained image-wise exposed imaging element is subsequently developed in the presence of a developing agent and silver halide solvent. The image-wise exposure is focused substantially within the silver halide emulsion layer of the imaging element. The present invention further provides an apparatus for carrying out the above method.

REFERENCES:
patent: 4501811 (1985-02-01), Saikawa et al.
patent: 4621041 (1986-11-01), Saikawa et al.
patent: 4873170 (1989-10-01), Nishinoiri et al.

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