Silver halide photographic material

Claim 1

A negative type silver halide photographic material comprising a support having thereon at least one silver halide emulsion layer containing a spectral sensitizing dye having an absorption maximum in the visible region, wherein the silver halide emulsion layer or another hydrophilic colloid layer provided on the support contains (1) a compound represented by formula (I) having substantially no absorption maximum in the visible region of the spectrum and (2) a hydrazine compound represented by formula (II): ##STR22## wherein Z 11 and Z 12 each represents a non-metallic atomic group completing a benzoxazole nucleus, a benzothiazole nucleus, a benzoselenazole nucleus, a naphthoxazole nucleus, a naphthothiazole nucleus, a naphthoselenazole nucleus, a thiazole nucleus, a thiazoline nucleus, an oxazole nucleus, a selenazole nucleus, a selenazoline nucleus, a pyridine nucleus, a benzimidazole nucleus, or a quinoline nucleus; R 11 and R 12 each represents an unsubstituted or substituted alkyl group, at least one of said R 11 and R 12 having an acid group; X 0 represents a charge balancing ion; and n represents 0 or 1; ##STR23## wherein A 1 and Z 2 each represents a hydrogen atom, or one of said A 1 and Z 2 represents a hydrogen atom and the other represents a sulfinic acid group or an acyl group; R 1 represents an aliphatic group, an aromatic group, or a heterocyclic group; R 2 represents a hydrogen atom, an alkyl group, an aryl group, an alkoxy group, an aryloxy group, or an amino group; at least one of R 1 and R 2 has an adsorption accelerating group with respect to silver halide; and G 1 represents a carbonyl group, a sulfonyl group, a sulfoxy group, a phosphoryl group, or an iminomethylene group.

Claim 10

A method for forming a superhigh contrast negative image, comprising the steps of image-wise exposing a negative type silver halide photographic material comprising a support having thereon at least one silver halide emulsion layer containing a spectral sensitizing dye having an absorption maximum in the visible region, wherein the silver halide emulsion layer or another hydrophilic colloid layer provided on the support contains (1) a compound represented by formula (I) having substantially no absorption maximum in the visible region of the spectrum and (2) a hydrazine compound represented by formula (II): ##STR27## wherein Z 11 and Z 12 each represents a non-metallic atomic group completing a benzoxazole nucleus, a benzothiazole nucleus, a benzoselenazole nucleus, a naphthoxazole nucleus, a naphthothiazole nucleus, a naphthoselenazole nucleus, a thiazole nucleus, a thiazoline nucleus, an oxazole nucleus, a selenazole nucleus, a selenazoline nucleus, a pyridine nucleus, a benzimidazole nucleus, or a quinoline nucleus; R 11 and R 12 each represents an unsubstituted or substituted alkyl group, at least one of said R 11 and R 12 having an acid group; X 0 represents a charge balancing ion; and n represents 0 or 1; ##STR28## wherein A 1 and A 2 each represents a hydrogen atom, or one of said A 1 and Z 2 represents a hydrogen atom and the other represents a sulfinic acid group or an acyl group; R 1 represents an aliphatic group, an aromatic group, or a heterocyclic group; R 2 represents a hydrogen atom, an alkyl group, an aryl group, an alkoxy group, an aryloxy group, or an amino group; at least one of R 1 and R 2 has an adsorption accelerating group with respect to silver halide; and G 1 represents a carbonyl group, a sulfonyl group, a sulfoxy group, a phosphoryl group, or an iminomethylene group, and developing the image-wise exposed photographic material to provide a processed photographic material having a reduced occurrence of black pepper spots while leaving no residual color.

Claim 11

A method for forming a superhigh contrast negative image, comprising the steps of image-wise exposing a negative type silver halide photographic material comprising a support having thereon at least one silver halide emulsion layer containing a spectral sensitizing dye having an absorption maximum in the visible region, wherein the silver halide emulsion layer or another hydrophilic colloid layer provided on the support contains (1) a compound represented by formula (I) having substantially no absorption maximum in the visible region of the spectrum and (2) a hydrazine compound represented by formula (II): ##STR27## wherein Z 11 and Z 12 each represents a non-metallic atomic group completing a benzoxazole nucleus, a benzothiazole nucleus, a benzoselenazole nucleus, a naphthoxazole nucleus, a naphthothiazole nucleus, a naphthoselenazole nucleus, a thiazole nucleus, a thiazoline nucleus, an oxazole nucleus, a selenazole nucleus, a selenazoline nucleus, a pyridine nucleus, a benzimidazole nucleus, or a quinoline nucleus; R 11 and R 12 each represents an unsubstituted or substituted alkyl group, at least one of said R 11 and R 12 having an acid group; X 0 represents a charge balancing ion; and n represents 0 or 1; ##STR28## wherein A 1 and A 2 each represents a hydrogen atom, or one of said A 1 and Z 2 represents a hydrogen atom and the other represents a sulfinic acid group or an acyl group; R 1 represents an aliphatic group, an aromatic group, or a heterocyclic group; R 2 represents a hydrogen atom, an alkyl group, an aryl group, an alkoxy group, an aryloxy group, or an amino group; at least one of R 1 and R 2 has an adsorption accelerating group with respect to silver halide; and G 1 represents a carbonyl group, a sulfonyl group, a sulfoxy group, a phosphoryl group, or an iminomethylene group, and developing the image-wise exposed photographic material to provide a processed photographic material having a reduced occurrence of black pepper spots while leaving no residual color.