Silver halide photographic material

Details Silver halide photographic material Silver halide photographic material

1989-05-17

1991-03-12

Le, Hoa Van

Radiation imagery chemistry: process, composition, or product th

Radiation sensitive product

Silver compound sensitizer containing

430264, 430592, 430600, 430607, 430613, 430622, 430628, 430639, 430640, 430641, 430642, G03C 105, G03C 122

Patent

active

049992821

ABSTRACT:
An improved silver halide photographic material having at least one layer of a light-sensitive silver halide emulsion that is spectrally sensitized with a sensitizing dye of the following general formula (1) to light having a wavelength of 750 nm and above. Said silver halide emulsion is prepared by a process which comprises generating silver halide grains by adding a solution of a water-soluble silver salt and a solution of a water-soluble halide to a solution containing a protective colloid, aggregating the generated silver halide grains with a polymeric flocculating together with the protective colloid, and removing the dissolved matter; ##STR1## where Z.sub.1 and Z.sub.3 each represents the non-metallic atomic group necessary to form an optionally substituted benzothiazole, benzoxazole, naphthothiazole or naphthoxazole nucleus; R.sub.1 and R.sub.2 each represents a saturated or unsaturated aliphatic group; Z.sub.2 represents a 5- or 6-membered ring of carbon atoms; A represents a hydrogen atom when Z.sub.2 is a 6-membered ring; X.sup..crclbar. is an anion; and n is 1 or 2.

REFERENCES:
patent: 3985503 (1976-10-01), Hirata et al.
patent: 4515888 (1985-05-01), Beretta et al.
patent: 4536473 (1985-08-01), Mihara
patent: 4596767 (1986-06-01), Mihara
patent: 4828962 (1989-05-01), Grzeskowial et al.
patent: 4839265 (1989-06-01), Ohno et al.
Japanese Abstract 60 119,547.
Japanese Abstract 60 131,532.

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