Silver halide photographic material and image forming method usi

Details Silver halide photographic material and image forming method usi Silver halide photographic material and image forming method usi

1991-09-23

1993-12-28

Schilling, Richard L.

Radiation imagery chemistry: process, composition, or product th

Silver halide colloid tanning process, composition, or product

430223, 430564, 430598, 430957, G03C 106, G03C 526

Patent

active

052738590

ABSTRACT:
A method for forming an image is disclosed. The method comprises the step of developing an imagewise exposed silver halide photographic material which contains a redox compound, with a developer which contains a silver halide developing agent and at least 0.1 mol/l of a sulfite and has a pH of 9 to 12, wherein the redox compound contains a redox group which is a hydrazine derivative which is capable of releasing a development inhibitor as a result of oxidation with the oxidized developer, and wherein after said oxidation, at least a portion of the development inhibitor is released into a developer where it reacts with a developer component and changes into a compound having little inhibiting effect. A silver halide photographic material used in that method is also disclosed.

REFERENCES:
patent: 4477563 (1984-10-01), Ichijima et al.
patent: 4684604 (1987-08-01), Harder
patent: 4782012 (1988-11-01), DeSelms et al.
patent: 5085971 (1992-02-01), Katoh et al.
patent: 5132201 (1992-07-01), Yagihara et al.
patent: 5134055 (1992-07-01), Okamura et al.
European Search Report 91 11 6544, Jan. 20, 1992, A. J. Buscha, The Hague.
The Journal of Photographic Science, vol. 35, No. 5, Sep. 1987, "An Improved Process for Hydrazine-Promoted Infectious Development of Silver Halide".

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