Claims
- 1. A light-sensitive silver halide photographic material which consists essentially of a support, at least one hydrophilic colloidal layer coated thereon containing silver halide grains having an average grain size of from 0.05 to 1.5 .mu.and at least 75% of which grains being within a range of from 0.6 to 1.4 times said average grain size, and a tetrazolium compound selected from the group consisting of a compound of formulae [I], [II] or [III]: ##STR2## wherein R.sub.1, R.sub.3, R.sub.4, R.sub.5, R.sub.8, R.sub.9, R.sub.10 and R.sub.11 each represent an aryl group or a heterocyclic group; R.sub.2, R.sub.6 and R.sub.7 each represents an aryl group, a heterocyclic group, an alkyl group, hydroxyl, carboxyl or the salt thereof, an amino group, mercapto, nitro or hydrogen; D represents a divalent aromatic group; E represents an alkylene group, an arylene group or an aralkylene group; X is an anion; said heterocyclic group being selected from the group consisting of a thiadiazolyl group, a benzothiadiazolyl group, an oxazolyl group, a pyrimidinyl group, a pyridyl group and a 2,5-dimethylthiazolyl group; and n is 1 or 2, provided that the compound forms an intramolecular salt when n is 1.
- 2. A light-sensitive silver halide photographic material according to claim 1 which material is to be treated with a developing solution containing a hydroquinone and Metol or phenidone and consists essentially of a support, at least one hydrophilic colloidal layer coated thereon containing silver halide grains having an average grain size of from 0.05 to 1.5 .mu. and at least 75% of which grains being within a range of from 0.6 to 1.4 times said average grain size, and a tetrazolium compound selected from the group consisting of a compound of formulae [I], [II] or [III]: ##STR3## wherein R.sub.1, R.sub.3, R.sub.4, R.sub.5, R.sub.8, R.sub.9, R.sub.10 and R.sub.11 each represents an aryl group or a heterocyclic group; R.sub.2, R.sub.6 and R.sub.7 each represents an aryl group, a heterocyclic group , an alkyl group, hydroxyl, carboxyl or the salt thereof, an amino group, mercapto, nitro or hydrogen; D represents a divalent aromatic group; E represents an alkylene group, an arylene group or an aralkylene group; X is an anion; said heterocyclic group being selected from the group consisting of a thiadiazolyl group, a benzothiadiazolyl group, an oxazolyl group, a pyrimidinyl group, a pyridyl group and a 2,5-dimethylthiazolyl group; and n is 1 or 2, provided that the compound forms an intramolecular salt when n is 1 according to claim 1 wherein the tetrazolium compound is non-diffusible.
- 3. A light-sensitive silver halide photographic material according to claim 1 wherein the tetrazolium compound is non-diffusible.
- 4. A light-sensitive silver halide photographic material according to claim 1 wherein the tetrazolium compound is diffusible.
- 5. A light-sensitive silver halide photographic material according to claim 1 wherein the hydrophilic colloidal layer is a gelatin layer.
- 6. A light-sensitive silver halide photographic material according to claim 1, wherein the silver halide has an average grain size of from 0.1 to 0.5.mu. and at least 80% grains are within a range of from 0.7 to 1.3 times said average grain size, the silver halide being silver chlorobromide or chloroiodobromide containing at least 50 mole % silver chloride.
- 7. A light-sensitive silver halide photographic material according to claim 1 wherein the tetrazolium compound is present in the at least one hydrophilic colloidal layer.
- 8. A light-sensitive silver halide photographic material according to claim 1 wherein the photographic material further comprises a gelatin layer adjacent to the at least one hydrophilic layer, the compound being present in the gelatin layer.
- 9. A light-sensitive silver halide photographic material according to claim 1 wherein the cation moiety of the tetrazolium compound is selected from the group consisting of the following:
- (1) 2-(Benzothiazol-2-yl)-3-phenyl-5-dodecyl-2H-tetrazolium
- (2) 2,3-Diphenyl-5-(4-t-octyloxyphenyl)-2H-tetrazolium
- (3) 2,3,5-Triphenyl-2H-tetrazolium
- (4) 2,3,5-Tri(p-carboxyethylphenyl-2H-tetrazolium
- (5) 2-(Benzothiazol-2-yl)-3-phenyl-5-(o-chlorophenyl)-2H-tetrazolium
- (6) 2,3-Diphenyl-2H-tetrazolium
- (7) 2,3-Diphenyl-5-methyl-2H-tetrazolium
- (8) 3-(p-Hydroxyphenyl)-5-methyl-2-phenyl-2H-tetrazolium
- (9) 2,3-Diphenyl-5-ethyl-2H-tetrazolium
- (10) 2,3-Diphenyl-5-n-hexyl-2H-tetrazolium
- (11) 5-Cyano-2,3-diphenyl-2H-tetrazolium
- (12) 2-(Benzothiazol-2-yl)-5-phenyl-3-(4-tolyl)-2H-tetrazolium
- (13) 2-(Benzothiazol-2-yl)-5-(4-chlorophenyl)-3-(4-nitrophenyl)-2H-tetrazolium
- (14) 5-Ethoxycarbonyl-2,3-di(3-nitrophenyl)-2H-tetrazolium
- (15) 5-Acetyl-2,3-di(p-ethoxyphenyl)-2H-tetrazolium
- (16) 2,5-Diphenyl-3-(p-tolyl)-2H-tetrazolium
- (17) 2,5-Diphenyl-3-(p-iodophenyl)-2H-tetrazolium
- (18) 2,3-Diphenyl-5-(p-diphenyl)-2H-tetrazolium
- (19) 5-(p-Bromophenyl)-2-phenyl-3-(2,4,6-trichlorophenyl)-2H-tetrazolium
- (20) 3-(p-Hydroxyphenyl)-5-(p-nitrophenyl)-2-phenyl-2H-tetrazolium
- (21) 5-(3,4-Dimethoxyphenyl)-3-(2-ethoxyphenyl)-2-(4-methoxyphenyl)-2H-tetrazolium
- (22) 5-(4-Cyanophenyl)-2,3-diphenyl-2H-tetrazolium
- (23) 3-(p-Acetamidophenyl)-2,5-diphenyl-2H-tetrazolium
- (24) 5-Acetyl-2,3-diphenyl-2H-tetrazolium
- (25) 5-(Fur-2-yl)-2,3-diphenyl-2H-tetrazolium
- (26) 5-(Thien-2-yl)-2,3-diphenyl-2H-tetrazolium
- (27) 2,3-Diphenyl-5-(pyrid-4-yl)-2H-tetrazolium
- (28) 2,3-Diphenyl-5-(quinol-2-yl)-2H-tetrazolium
- (29) 2,3-Diphenyl-5-(benzoxazol-2-yl)-2H-tetrazolium
- (30) 2,3-Diphenyl-5-nitro-2H-tetrazolium
- (31) 2,2',3,3'-Tetraphenyl-5,5'-1,4-butylene-di-(2H-tetrazolium)
- (32) 2,2',3,3'-Tetraphenyl-5,5'-p-phenylene-di-(2H-tetrazolium)
- (33) 2-(4,5-Dimethylthiazol-2-yl)-3,5-diphenyl-2H-tetrazolium
- (34) 3,5-Diphenyl-2-(triazin-2-yl)-2H-tetrazolium
- (35) 2-(Benzothiazol-2-yl)-3-(4-methoxyphenyl)-5-phenyl-2H-tetrazolium
- (36) 2,5-Diphenyl-3-.alpha.-naphthyl-2H-tetrazolium
- (37) 3,3'-(3,3'-Dimethoxy-4,4'-diphenylene)-2,2',5,5'-tetraphenyl-di-(2H-tetrazolium).
- 10. A light-sensitive silver halide photographic material according to claim 1 wherein the light-sensitive silver halide photographic material further comprises an outermost gelatin protective layer having a thickness of from 0.1 to 10 .mu. on the hydrophilic colloidal layer.
Priority Claims (1)
Number |
Date |
Country |
Kind |
50-94295 |
Aug 1975 |
JPX |
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Parent Case Info
This application is a continuation application of our application Ser. No. 818,507, filed July 25, 1977, now abandoned, which, in turn, is a continuation-in-part of our application Ser. No. 710,385, filed Aug. 2, 1976, and now abandoned in favor of Ser. No. 948,539, filed Oct. 4, 1978, as a continuation of said Ser. No. 710,385.
US Referenced Citations (7)
Continuations (1)
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Number |
Date |
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Parent |
818507 |
Jul 1977 |
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Continuation in Parts (1)
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Number |
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710385 |
Aug 1976 |
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