US 5,670,292 A · Dry type image formation process

Abstract

A dry type image formation process which comprises imagewise exposing a heat-developable photosensitive material to light, and then heat-developing the heat-developable photosensitive material, wherein the heat-developable photosensitive material further comprises a component isolated by microcapsules and the heat-developable photosensitive material is pressed before or after heat development so that the microcapsules are ruptured to release the internal phase and cause the component to be diffused into the photosensitive layer, allowing its function to be fulfilled, and an image formation process which comprises heat-developing a heat-developable photosensitive material after or simultaneously with imagewise exposing, the heat-developable photosensitive material comprising a photosensitive silver halide, a reducing agent, a basic precursor, a dye-providing substance which undergoes heat development to release or produce a dye, and a silver halide fixing agent which is a compound capable of fixing and stabilizing the silver halide, which comprises isolating the silver halide fixing agent from the silver halide before heat-developing so as not to affect the silver halide and bring the silver halide fixing agent in contact with the silver halide after or simultaneously with heat-developing to fix undeveloped silver halide.

Claims8

Dependent claims

A dry image formation process which comprises imagewise exposing a heat-developable photosensitive material to light, and then heat-developing the heat-developable photosensitive material to obtain an image, the heat-developable photosensitive material comprising a support having provided thereon a photosensitive layer comprising at least a silver halide, a binder and a reducing agent,

wherein the heat-developable photosensitive material further comprises a component isolated as an internal phase in microcapsules, said component being a silver halide fixing agent, a development stopping agent, or a silver halide print-out inhibitor,
and wherein the heat-developable photosensitive material is pressed before or after heat development so that the microcapsules are ruptured to release the internal phase and cause the component to be diffused into the photosensitive layer, allowing the function of the component to be fulfilled.

An image formation process which comprises heat-developing a heat-developable photosensitive material after or simultaneously with imagewise exposing, the heat-developable photosensitive material comprising a support having provided thereon a silver haline-containing photosensitive layer, a reducing agent, a basic precursor, a dye-providing substance which undergoes heat development to release or produce a dye, and a silver halide fixing agent which is a compound capable of fixing and stabilizing the silver halide,

which process comprises the steps of isolating the silver halide fixing agent from the silver halide before heat-developing so as not to affect the silver halide and
bringing the silver halide fixing agent in contact with the silver halide after or simultaneously with heat-developing to fix undeveloped silver halide,
wherein the step of isolating the silver halide fixing agent from the silver halide is accomplished by
(a) incorporating the silver halide fixing agent in the form of a solid dispersion into the heat-developable photosensitive material,
(b) providing a water-resistant barrier layer between a layer containing the silver halide fixing agent and the photosensitive layer, or
(c) incorporating the silver halide fixing agent into microcapsules and rupturing the microcapsules after or simultaneously with heat-developing to release the silver halide fixing agent contained in the inside of the microcapsules to diffuse the silver halide fixing agent into the photosensitive layer.

3 more elements

Dependencies are inferred from the claim text.

Dry type image formation process

Life of this patent

Dry type image formation process

Life of this patent

Abstract

Claims8