Claims
- 1. A silver halide photographic emulsion containing, in combination, supersensitizing amounts of at least one sensitizing dye of the following general formula (I) ##STR9##wherein Z.sub.1 and Z.sub.2 each represents an atomic group required for forming a benzimidazole ring and the ring formed by Z.sub.2 or the ring formed by Z.sub.1 is substituted in the 5-position with a chlorine atom, a methoxycarbonyl group, an ethoxycarbonyl group, a propoxycarbonyl group, a butoxycarbonyl group, a methylcarbonyl group or an ethylcarbonyl group; R.sub.1 and R.sub.2 each represents an aliphatic group and at least one of R.sub.1 and R.sub.2 represents an alkyl group having a sulfo group; X.sub.1 represents an acid anion; and m is 1 or 2, and when m is 1 the dye forms an inner salt;
- and at least one sensitizing dye of the following general formula (II) ##STR10##wherein Z.sub.3 represents an atomic group required for forming a benzoxazole ring or a .beta.-naphthoxazole ring; Z.sub.4 represents an atomic group required for forming a benzothiazole ring, a benzoselenazole ring, a .beta.-naphtholthiazole ring or a .beta.-naphthoselenazole ring; R.sub.3 and R.sub.4 represents an alkyl group having a carboxy group or an alkyl group having a sulfo group; R.sub.5 represents a hydrogen atom or an alkyl group; X.sub.2 represents an acid anion; and n is 1 or 2, and when n is 1 the dye forms an inner salt.
- 2. The silver halide photographic emulsion of claim 1, wherein the heterocyclic ring formed by Z.sub.1 and the heterocyclic ring formed by Z.sub.2 is a benzimidazole ring substituted in the 5- and 6-positions with at least one chlorine atom.
- 3. The silver halide photographic emulsion of claim 1, wherein the heterocyclic ring formed by Z.sub.3 represents an unsubstituted benzoxazole ring, a benzoxazole ring substituted in the 5-position with a methyl group, a methoxy group, a chlorine atom or a phenyl group, or a .beta.-naphthoxazole ring, and R.sub.5 represents an ethyl group.
- 4. The silver halide photographic emulsion of claim 1, wherein the heterocyclic ring formed by Z.sub.4 represents an unsubstituted benzothiazole ring, a benzothiazole ring substituted in the 5-position with a methyl group, a methoxy group, a chlorine atom or a phenyl group, or a .beta.-naphthothiazole ring, and R.sub.5 represents an ethyl group.
- 5. The silver halide photographic emulsion of claim 1, wherein the heterocyclic ring formed by Z.sub.4 represents an unsubstituted benzoselenazole ring, a benzoselenazole ring substituted in the 5-position with a methyl group, a methoxy group, a chlorine atom or a phenyl, or a .beta.-naphthoselenazole ring, and R.sub.5 represents an ethyl group.
- 6. The silver halide photographic emulsion of claim 1, wherein at least one of R.sub.1 and R.sub.2 represents a sulfoalkyl group, a carboxyalkyl group or a hydroxyalkyl group.
- 7. The silver halide photographic emulsion of claim 1, wherein at least one of R.sub.3 and R.sub.4 represents a sulfoalkyl group or a carboxyalkyl group.
- 8. The silver halide emulsion of claim 1 wherein the benzimidazole rings formed by Z.sub.1 and Z.sub.2 are each substituted in the 5-position with a chlorine atom.
- 9. The silver halide photographic emulsion of claim 1, including a color coupler.
- 10. The silver halide photographic emulsion of claim 1, wherein the heterocyclic ring formed by Z.sub.3 represents an unsubstituted benzoxazole ring, a benzoxazole ring substituted in the 5-position with a methyl group, a methoxy group, a chlorine atom or a phenyl group, or a .beta.-naphthoxazole ring, the heterocyclic ring formed by Z.sub.4 represents an unsubstituted benzothiazole ring, a benzothiazole ring substituted in the 5-position with a methyl group, a methoxy group, a chlorine atom or a phenyl group, or a .beta.-naphthothiazole ring, and R.sub.5 represents an ethyl group.
- 11. The silver halide photographic emulsion of claim 1, wherein the heterocyclic ring formed by Z.sub.3 represents an unsubstituted benzoxazole ring, a benzoxazole ring substituted in the 5-position with a methyl group, a methoxy group, a chlorine atom or a phenyl group, or a .beta.-naphthoxazole ring, the heterocyclic ring formed by Z.sub.4 represents an unsubstituted benzoselenazole ring, a benzoselenazole ring substituted in the 5-position with a methyl group, a methoxy group, a chlorine atom or a phenyl group, or a .beta.-naphthoselenazole ring, and R.sub.5 represents an ethyl group.
- 12. A photographic material comprising a support having thereon the silver halide photographic emulsion of claim 1.
Priority Claims (1)
Number |
Date |
Country |
Kind |
48-138345 |
Dec 1973 |
JA |
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Parent Case Info
This is a continuation of application Ser. No. 530,125, filed Dec. 6, 1974, now abandoned.
US Referenced Citations (2)
Number |
Name |
Date |
Kind |
3348949 |
Bannert et al. |
Oct 1967 |
|
3856532 |
Thurston et al. |
Dec 1974 |
|
Continuations (1)
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Number |
Date |
Country |
Parent |
530125 |
Dec 1974 |
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