Silver halide photographic material
AssigneeFuji Photo Film Co., Ltd.
InventorsHisashi Okamura, Hiroshi Kawamoto, Kazuhiko Matsumoto, Kazunobu Katoh
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Abstract
A silver halide photographic material which provides a negative image is disclosed. The photographic material contains a compound represented by formula (I): ##STR1## wherein R represents an aliphatic group, an aromatic group, or a heterocyclic group; and Z represents an atomic group necessary to form a nitrogen-containing heterocyclic aromatic group, and provides a negative image having high contract, high sensitivity, an satisfactory dot image quality.
Claims14
A silver halide photographic material comprising a silver halide emulsion and a compound represented by formula (I):
- ##STR57## wherein R represents an aliphatic group, an aromatic group, or a heterocyclic group;
- and Z represents an atomic group necessary to form a nitrogen-containing heterocyclic aromatic group, said heterocyclic ring being selected from the group consisting of pyrrole, imidazole, pyrazole, 1,2,3-triazole, 1,2,4-triazole, tetrazole, 2-thioxathiazoline, 2-oxathiazoline, 2-thioxaoxazoline, 2-oxazoline-5-thione, 1,2-thiazoline-5-thione, 1,2-oxazoline-5-one, 1,2-thiozoline-5-one, 5-thioxatetrazoline, 2-thioxa-1,3,4-thiadiazoline, 2-oxa-1,3,4-thiadiazoline, 2-thioxa-1,3,4-oxadiazoline, 2-oxa-1,3,4-oxadiazoline, 3-thioxa-1,2,4-triazoline, 2-thioxadihydropyridine, 2-oxadihydropyridine, isoindole, indole, indazole, benzimidazole, 2-thioxabenzimidazole, 2-oxabenzimidazole, benzoxazoline-2-thione, benzooxazoline-2one, benzothiazoline-2-thione, benzothiazoline-2-one, purine, pyrazolopyridines, and pyrazolopyrimidines, and wherein R contains a ballast group or a group which is capable of accelerating adsorption of the compound onto silver halide.
Dependencies are inferred from the claim text.