Silver halide photographic light-sensitive material and process

Details Silver halide photographic light-sensitive material and process Silver halide photographic light-sensitive material and process

1981-07-29

1982-08-24

Downey, Mary F.

Radiation imagery chemistry: process, composition, or product th

Radiation sensitive product

Silver compound sensitizer containing

430599, 430600, 430605, 430607, 430608, 430613, 430949, G03C 102, G03C 128, G03C 134

Patent

active

043461670

ABSTRACT:
A silver halide photographic light-sensitive material is described comprising a support having thereon at least one light-sensitive silver halide emulsion layer, said silver halide emulsion layer containing a rhodium salt in an amount sufficient to increase a contrast thereof, and said silver halide emulsion layer or a layer adjacent thereto containing a compound represented by the following formula (I) or (II), and a process for producing a silver halide photographic emulsion containing rhodium salts is also described which comprises adding a rhodium salt into a silver halide photographic emulsion in an amount sufficient to increase a contrast before the conclusion of first ripening and adding a compound represented by the following formula (I) or (II) into the resulting emulsion after washing to remove useless salts ##STR1## wherein R.sub.1 represents hydrogen or a substituted or unsubstituted alkyl group.
The silver halide photographic light-sensitive material and a silver halide photographic emulsion each is capable of providing high contrast images and stabilized photographic properties; particularly, gradation properties remain stable during storage.

REFERENCES:
patent: 3440049 (1969-04-01), Moede
patent: 3488709 (1970-01-01), Sidebotham
patent: 3672902 (1972-06-01), van Stappen et al.
patent: 3901713 (1975-08-01), Yamasue et al.
patent: 4221864 (1980-09-01), Iytaka et al.
patent: 4233400 (1980-11-01), Fujiwhara et al.
patent: 4268621 (1981-05-01), Ogi
patent: 4283479 (1981-08-01), Hamaoka et al.
patent: 4299909 (1981-10-01), Imatomi et al.

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