Process of forming super high-contrast negative images and silve

Details Process of forming super high-contrast negative images and silve Process of forming super high-contrast negative images and silve

1994-07-22

1995-10-24

Neville, Thomas R.

Radiation imagery chemistry: process, composition, or product th

Silver halide colloid tanning process, composition, or product

430442, 430436, 430480, 430478, 430487, 430490, 430268, G03C 106

Patent

active

054609194

ABSTRACT:
A process of forming a super high-contrast negative image is disclosed, which comprises the steps of imagewise exposing a negative-working silver halide photographic material comprising a support having thereon one or more hydrophilic colloidal layers, at least one of the one or more hydrophilic colloidal layers being a negative-working silver halide emulsion layer, and then developing the photographic material with a developer containing an aminophenol derivative developing agent and a reductone compound in the existence of an organic compound having a negative reduction potential. A negative-working silver halide photographic material and a photographic developer being used for the image-forming process are also disclosed.

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patent: 5217842 (1993-06-01), Kojima et al.
patent: 5275915 (1994-01-01), Kojima et al.
patent: 5362621 (1994-11-01), Obi et al.

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