Photosensitive printing plate, method of preparing same, and met

Details Photosensitive printing plate, method of preparing same, and met Photosensitive printing plate, method of preparing same, and met

1978-04-24

1980-02-12

Kelley, Mary F.

Radiation imagery chemistry: process, composition, or product th

Diazo reproduction, process, composition, or product

Composition or product which contains radiation sensitive...

430328, 430303, 430270, 430275, 430271, G03C 176, G03C 300, G03F 702

Patent

active

041882156

ABSTRACT:
A photosensitive printing plate with high sensitivity comprising a support having a hydrophilic surface and formed in succession thereon (1) a layer of an oleophilic photosensitive resin composition whose solubility in a solvent is changed by exposure to light to which the resin composition layer is sensitive and (2) directly on the layer (1) a layer containing a dispersion of particles of photosensitive silver halide grains coated with a water-soluble polymer in an oleophilic polymer capable of being dissolved in a developer for the photosensitive resin composition.
The photosensitive printing plate is first image-wise exposed to light to which only the layer containing the silver halide is sensitive followed by silver halide development with an aqueous developer solution to form a silver image, subjected then to overall exposure using light to which the layer of the photosensitive resin composition is sensitive, and developed with a developer which dissolves the oleophilic polymer in the layer containing the silver halide and only one of either the exposed portions or the unexposed portions of the layer of the photosensitive resin composition.

REFERENCES:
patent: T870022 (1970-01-01), Kenyon
patent: 3245793 (1966-04-01), Smith
patent: 3313626 (1967-04-01), Whitney
patent: 3442648 (1969-05-01), Smith
patent: 3511658 (1970-05-01), Manko
patent: 3515547 (1970-06-01), Allentoff
patent: 3567445 (1971-03-01), Atkinson
patent: 3730717 (1973-05-01), Chu
patent: 3844789 (1974-10-01), Bates

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