Spectrally sensitized silver halide photographic emulsion

Details Spectrally sensitized silver halide photographic emulsion Spectrally sensitized silver halide photographic emulsion

1974-12-06

1976-08-31

Brown, J. Travis

Gas separation: apparatus

Solid sorbent apparatus

Plural solid sorbent beds

96131, 96132, 96137, G03C 114

Patent

active

039778835

ABSTRACT:
A silver halide photographic emulsion containing, in combination, supersensitizing amounts of at least one sensitizing dye of the following general formula (I) ##EQU1## WHEREIN Z.sub.1 and Z.sub.2 each represents an atomic group required to form a quinoline ring; R.sub.1 and R.sub.2 each represents an aliphatic group, with at least one of R.sub.1 and R.sub.2 being a hydroxyalkyl group, an alkyl group containing a carboxyl group or an alkyl group containing a sulfo group; X.sub.1 is an acid anion; and m is 1 or 2, and when m is 1 the dye forms an intramolecular salt and at least one sensitizing dye of the following general formula (II) ##EQU2## WHEREIN Z.sub.3 represents an atomic group required to form a benzimidazole ring, a benzoxazole ring or a .beta.-naphthoxazole ring; Z.sub.4 represents an atomic group required to form a benzothiazole ring, a benzoselenazole ring, a .beta.-naphthothiazole ring or a .beta.-naphthoselenazole ring; R.sub.3 and R.sub.4 each represents an aliphatic group with at least one of R.sub.3 and R.sub.4 being an alkyl group containing a carboxyl group, a hydroxyalkyl group or an alkyl group containing a sulfo group; R.sub.5 represents a hydrogen atom or an alkyl group; X.sub.2 is an acid anion group; and n is 1 or 2, and when n is 1 the dye forms an intramolecular salt.

REFERENCES:
patent: 3667960 (1972-06-01), Shiba et al.
patent: 3745014 (1973-07-01), Nakazawa et al.

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