Formation of print surfaces

Details Formation of print surfaces Formation of print surfaces

1982-02-05

1984-05-29

Kittle, John E.

Radiation imagery chemistry: process, composition, or product th

Imaging affecting physical property of radiation sensitive...

Making printing plates

430 5, 430271, 430273, 430945, 430950, G03F 702

Patent

active

044515529

ABSTRACT:
A print surface is formed by photoexposure of a photocurable resin layer through a photomask comprising an image-wise distribution of opaque material on its image surface, and sticking of the image surface to the resin layer during photoexposure is prevented by providing over the image surface a clear thin film of a natural gum or other material that is impermeable to softeners such as alcohols that are liberated from the resin layer. A coated photomask may be made by image-wise laser scanning of a transparent sheet to which opaque material such as graphite is bonded by a binder such as an alkyl cellulose, followed by application of the film over the resultant image-wise distribution of opaque material.

REFERENCES:
patent: 4126460 (1978-11-01), Okishi
patent: 4168979 (1979-09-01), Okishi et al.
patent: 4201581 (1980-05-01), Thomas et al.
patent: 4216289 (1980-08-01), Oda et al.
patent: 4238560 (1980-12-01), Nakamura et al.
patent: 4245003 (1981-01-01), Oransky et al.
patent: 4268611 (1981-05-01), Okishi et al.

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