Silver halide photographic material and method for forming super high contrast negative images therewith

Claim 2

A negative type silver halide photographic material comprising a support having provided thereon at least one silver halide emulsion layer which has a substantial influence upon image density and at least one light-insensitive hydrophilic colloid layer, wherein a hydrophilic colloid layer other than said silver halide emulsion layer contains a hydrazine derivative in a non-diffusing condition, wherein the hydrophilic colloid layer which contains the hydrazine derivative in a non-diffusing condition is a light-insensitive layer which does not have a substantial influence on image density, and wherein said hydrazine derivative is represented by formula (I): ##STR8## wherein A 1 and A 2 both represent hydrogen atoms, or one of A 1 and A 2 represents a hydrogen atom and the other represents a sulfinic acid residue; R 1 represents an aliphatic group, an aromatic group, or a heterocyclic group; R 2 represents a hydrogen atom, a substituted or unsubstituted alkyl group, a substituted or unsubstituted aryl group, a substituted or unsubstituted alkoxy group, or a substituted or unsubstituted aryloxy group; and G represents a carbonyl group, a sulfonyl group, a sulfoxy group, a phosphoryl group, or an N-substituted or unsubstituted iminomethylene group, provided that at least one of R 1 and R 2 contains at least one group having a pKa of from 8 to 13 which is capable of dissociating into an anionic ion.

Claim 3

A negative type silver halide photographic material as in claim 1, wherein said compound represented by formula (I) does not contain a group having a pKa of less than 8 and in which when the substituents are considered in combination the quotient of (molecular weight)/(number of dissociable groups plus 1) is from 150 to 650.

Claim 4

A negative type silver halide photographic material as in claim 1, wherein said hydrazine derivative contains an adsorbing group.

Claim 5

A negative type silver halide photographic material as in claim 1, wherein the hydrazine derivative is present in an amount of from 1×10 -6 to 1×10 -1 mol per mol of silver halide in said hydrophilic colloid layer.

Claim 6

A negative type silver halide photographic material as in claim 1, wherein the hydrazine derivative is present in an amount of from 1×10 -5 to 4×10 -2 mol per mol of silver halide in said hydrophiic colloid layer.

Claim 7

A process for forming a super high contrast negative image which comprises imagewise exposing a negative type silver halide photographic material comprising a support having provided thereon at least one silver halide emulsion layer which has a substantial influence upon image density and at least one light-insensitive hydrophilic colloid layer, wherein a hydrophilic colloid layer other than said silver halide emulsion layer contains a hydrazine derivative in a non-diffusing condition, and then developing the photographic material with a developer containing not less than 0.15 mol/liter of sulfite ions and having a pH of from 10.5 to 12.3, and wherein said hydrazine derivative is represented by formula (I): ##STR9## wherein A 1 and A 2 both represent hydrogen atoms, or one of A 1 and A 2 represents a hydrogen atom and the other represents a sulfinic acid residue; R 1 represents an aliphatic group, an aromatic group, or a heterocyclic group; R 2 represents a hydrogen atom, a substituted or unsubstituted alkyl group, a substituted or unsubstituted aryl group, a substituted or unsubstituted alkoxy group, or a substituted or unsubstituted aryloxy group; and G represents a carbonyl group, a sulfonyl group, a sulfoxy group, a phosphoryl group, or an N-substituted or unsubstituted iminomethylene group, provided that at least one of R 1 and R 2 contains at least one group having a pKa of from 8 to 13 which is capable of dissociating into an anionic ion.

Claim 8

A process for forming a super high contrast negative image which comprises imagewise exposing a negative type silver halide photographic material comprising a support having provided thereon at least one silver halide emulsion layer which has a substantial influence upon image density and at least one light-insensitive hydrophilic colloid layer, wherein a hydrophilic colloid layer other than said silver halide emulsion layer contains a hydrazine derivative in a non-diffusing condition, and then developing the photographic material with a developer containing not less than 0.15 mol/liter of sulfite ions and having a pH of from 10.5 to 12.3, and wherein said hydrazine derivative is represented by formula (I): ##STR9## wherein A 1 and A 2 both represent hydrogen atoms, or one of A 1 and A 2 represents a hydrogen atom and the other represents a sulfinic acid residue; R 1 represents an aliphatic group, an aromatic group, or a heterocyclic group; R 2 represents a hydrogen atom, a substituted or unsubstituted alkyl group, a substituted or unsubstituted aryl group, a substituted or unsubstituted alkoxy group, or a substituted or unsubstituted aryloxy group; and G represents a carbonyl group, a sulfonyl group, a sulfoxy group, a phosphoryl group, or an N-substituted or unsubstituted iminomethylene group, provided that at least one of R 1 and R 2 contains at least one group having a pKa of from 8 to 13 which is capable of dissociating into an anionic ion.

Claim 9

A process for forming a super high contrast negative image as in claim 6, wherein said compound represented by formula (I) does not contain a group having a pKa of less than 8 and in which when the substituents are considered in combination the quotient of (molecular weight)/(number of dissociable groups plus 1) is from 150 to 650.

Claim 10

A process for forming a super high contrast negative image as in claim 6, wherein said hydrazine derivative contains an adsorbing group.

Claim 11

A process for forming a super high contrast negative image as in claim 6, wherein the hydrazine derivative is present in an amount of from 1×10 -6 to 1×10 -1 mol per mol of silver halide in said hydrophilic colloid layer.

Claim 12

A process for forming a super high contrast negative image as in claim 6, wherein the hydrazine derivative is present in an amount of from 1×10 -5 to 4×10 -2 mol per mol of silver halide in said hydrophilic colloid layer.

Claim 13

A negative type silver halide photographic material as in claim 1, wherein said hydrophilic colloid layer additionally contains a compound represented by formula (II) ##STR10## wherein A 3 and A 4 both represent hydrogen atoms, or one of A 3 and A 4 represents a hydrogen atom and the other represents a sulfinic acid residue; R 3 represents an aliphatic group, an aromatic group, or a heterocyclic group; R 4 represents a hydrogen atom, a substituted or unsubstituted alkyl group, a substituted or unsubstituted aryl group, a substituted or unsubstituted alkoxy group, or a substituted or unsubstituted aryloxy group; and G represents a carbonyl group, a sulfonyl group, a sulfoxy group, a phosphoryl group, or an N-substituted or unsubstituted iminomethylene group (>C═NH), provided that at least one of R 3 and R 4 contains at least one group of a mercapto group (--SH), a thiocarbonyl group (--C═S), or an azole ring.

Claim 14

A process for forming a super high contrast negative image as in claim 6, wherein said hydrophilic colloid layer additionally contains a compound represented by formula (II) ##STR11## wherein A 3 and A 4 both represent hydrogen atoms, or one of A 3 and A 4 represents a hydrogen atom and the other represents a sulfinic acid residue; R 3 represents an aliphatic group, an aromatic group, or a heterocyclic group; R 4 represents a hydrogen atom, a substituted or unsubstituted alkyl group, a substituted or unsubstituted aryl group, a substituted or unsubstituted alkoxy group, or a substituted or unsubstituted aryloxy group; and G represents a carbonyl group, a sulfonyl group, a sulfoxy group, a phosphoryl group, or an N-substituted or unsubstituted iminomethylene group (>C═NH), provided that at least one of R 3 and R 4 contains at least one group of a mercapto group (--SH), a thiocarbonyl group (--C═S), or an azole ring.

Claim 15

A negative type silver halide photographic material as in claim 1, wherein the light-insensitive layer is a light-insensitive hydrophilic colloid layer or a silver halide emulsion layer which does not have a substantial influence on image density.

Claim 16

A negative type silver halide photographic material as in claim 13, wherein the light-insensitive layer is a light-insensitive hydrophilic colloid layer.

Claim 17

A negative type silver halide photographic material as in claim 13, wherein the light-insensitive layer is a silver halide emulsion layer which does not have a substantial influence on image density.

Claim 18

A process for forming a super high contrast negative image as in claim 6, wherein the light-insensitive layer is a light-insensitive hydrophilic colloid layer or a silver halide emulsion layer which does not have a substantial influence on image density.

Claim 19

A process for forming a super high contrast negative image as in claim 16, wherein the light-insensitive layer is a light-insensitive hydrophilic colloid layer.

Claim 20

A process for forming a super high contrast negative image as in claim 16, wherein the light-insensitive layer is a silver halide emulsion layer which does not have a substantial influence on image density.