Process for producing a high contrast photographic image

Details Process for producing a high contrast photographic image Process for producing a high contrast photographic image

1978-08-18

1980-09-09

Downey, Mary F.

Radiation imagery chemistry: process, composition, or product th

Silver halide colloid tanning process, composition, or product

430266, 430444, 430448, 430602, 430599, 430567, G03C 530, G03C 106

Patent

active

042218578

ABSTRACT:
A process for producing a high contrast photographic image comprising developing an image-wise exposed silver halide photographic light-sensitive material comprising a support having thereon at least one silver halide emulsion layer with a developer containing (a) free sulfite ion in a concentration of at least 0.18 mol/l and (b) as substantially the only developing agent a dihydroxybenzene in the presence of (i) at least one compound represented by the following general formula (I);

REFERENCES:
patent: 2495000 (1950-01-01), Hanford
patent: 2498418 (1950-02-01), Hanford
patent: 2892715 (1959-06-01), Hunsberger
patent: 3340058 (1967-09-01), von Konig
patent: 3730727 (1973-05-01), Olivares et al.
patent: 3782949 (1974-01-01), Olivares et al.
patent: 4030925 (1977-06-01), Leone et al.

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