Interimage effects with spontaneously developable silver halide

Details Interimage effects with spontaneously developable silver halide Interimage effects with spontaneously developable silver halide

1976-05-20

1978-04-04

Klein, David

Gas separation: apparatus

Electric field separation apparatus

With nonelectrical gas treating or conditioning means

96 22, 96 55, 96 69, G03C 176, G03C 300, G03C 700, G03C 716

Patent

active

040825531

ABSTRACT:
The present invention is directed to a process of forming a photographic element capable of forming a reversal image including a support and two silver halide emulsion layers primarily responsive to a different portion of the visible spectrum upon imagewise exposure of the photographic element. The emulsion layers are positioned to permit iodide ion migration therebetween upon development. Each emulsion layer contains silver halide grains capable of forming a latent image upon imagewise exposure and a hydrophillic colloid suspending the grains. One of the emulsion layers is comprised of silver haloiodide grains. One other of the silver halide emulsion layers additionally contains suspended in the hydrophilic colloid and interspersed with the latent image forming silver halide grains surface fogged silver halide grains which are spontaneously developable independently of imagewise exposure of the photographic element as though exposed to imaging radiation of maximum intensity. This invention also relates to obtaining a favorable interimage effect by reversal processing the photographic element with a silver halide solvent incorporated in the black-and-white developer solution.

REFERENCES:
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patent: 2319369 (1943-05-01), Sease et al.
patent: 2875052 (1959-02-01), Weyde
patent: 2937086 (1960-05-01), Yutzy et al.
patent: 2996382 (1961-08-01), Luckey et al.
patent: 3227551 (1966-01-01), Barr et al.
patent: 3536487 (1970-10-01), Graham
patent: 3607278 (1971-09-01), Ditzer et al.
patent: 3630745 (1971-12-01), Beavers et al.
patent: 3737317 (1973-06-01), Nicholas et al.
patent: 3832174 (1974-08-01), Bello et al.
Mees et al., The Theory of the Photographic Process, The Macmillan Co., New York, .COPYRGT. 1966, pp. 342, 343.

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