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US 4,233,393 AGranted
Silver halidephotosensitive material
AssigneeFuji Photo Film Co., Ltd.
InventorsKeisuke Shiba, Nobuyuki Kita
Life of this patent
Estimating the term…
Abstract
A silver halide photosensitive material capable of providing a relief image after imagewise exposure, tanning development and washing off the non-exposed portions comprising a support having thereon a silver halide emulsion layer, in which the silver halide emulsion layer has thereon a synthetic resin layer which is substantially insoluble in water and permeable to water and has an oleophilic surface.
Claims12
A process of preparing a printing plate which comprises the steps of
- (1) imagewise exposing a silver halide photosensitive material comprising a support having a hydrophilic surface, a silver halide photosensitive emulsion layer on said surface and synthetic resin layer on said emulsion layer, with the synthetic resin being substantially insoluble in water, with the synthetic resin layer being permeable to water and an alkaline solution and with the synthetic resin being at least one of a polymer and oligomer, and being selected from the group consisting of polyesters, polyamides, phenolaldehyde resins, polyurethanes, epoxy resins, silicone resins, polyamines, polystyrenes, polyacrylates, polyvinyl acetate, hydroxypropyl methyl cellulose and hexahydrophthalate.
- (2) tanning developing said exposed photosensitive material, and then
- (3) washing-off said tanning developed photosensitive material with water to remove non-tanned area of said emulsion layer and synthetic resin layer on said area to reveal the hydrophilic surface of the support, thereby to form a printing plate.
Dependencies are inferred from the claim text.