Silver halide photographic emulsions

Details Silver halide photographic emulsions Silver halide photographic emulsions

1975-07-25

1976-08-24

Brown, J. Travis

Gas separation: apparatus

Electric field separation apparatus

Collecting electrode details

96124, 96132, G03C 114, G03C 140

Patent

active

039764923

ABSTRACT:
A silver halide photographic emulsion containing at least one sensitizing dye represented by the formula (I) ##EQU1## wherein Z.sub.1 represents a group of atoms necessary to complete a thiazole nucleus, a benzothiazole nucleus, a benzoselenazole nucleus, a naphthothiazole nucleus or a naphthoselenazole nucleus; Z.sub.2 represents a group of atoms necessary to complete a naphthothiazole nucleus or a naphthoselenazole nucleus; and R.sub.1 and R.sub.2, which may be the same or different, each represents an aliphatic group and at least one of R.sub.1 and R.sub.2 is an aliphatic group containing a carboxyl group or a sulfo group; and at least one sensitizing dye represented by the formula (II) ##EQU2## wherein Z.sub.3 and Z.sub.4 which may be the same or different, each represents a group of atoms necessary to complete a thiazole nucleus, a benzothiazole nucleus or a benzoselenazole nucleus; and R.sub.3 and R.sub.4, which may be the same or different, each represents an aliphatic group and at least one of R.sub.3 and R.sub.4 is an aliphatic group containing a carboxyl group or a sulfo group.

REFERENCES:
patent: 2089323 (1937-08-01), Zeh
patent: 2701198 (1955-02-01), Carroll et al.
patent: 3752670 (1973-08-01), Needler et al.
patent: 3847613 (1974-11-01), Sakazume et al.

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