摘要:
A method of forming a black-and-white image of very high contrast having a gamma value of 8 or above is disclosed, using a negative imagewise exposed photosensitive material comprising a support having thereon at least one hydrophilic colloid layer, at least one layer which is a silver halide emulsion layer, at least one of said hydrophilic colloid layer containing a hydrazine derivative represented by formula (I), comprising processing the photosensitive material with a developer having a pH of 11.2 or lower, said developer being substantially free from benzotriazoles to thereby provide a wide exposure latitude and steady image formability: wherein R₁ represents an aliphatic group or an aromatic group; R₂ represents a hydrogen atom, an alkyl group, an aryl group, an alkoxy group, an aryloxy group, an amino group, a carbamoyl group or an oxycarbonyl group; G₁ represents a carbonyl group, a sulfonyl group, a sulfoxy group, or an iminomethylene group; and each of A₁ and A₂ represents a hydrogen atom, or one of A₁ and A₂ is a hydrogen atom and the other is an alkylsulfonyl group, an arylsulfonyl group, or an acyl group.
摘要:
The present invention provides a process for preparing a negative image of high contrast comprising developing an exposed silver halide photographic material which is substantially a surface latent image-type material in the presence of a hydrazine derivative, wherein said material is processed with a water-soluble alkaline developer having a pH value of from 10.5 to 12.3 and at least comprising the following components (1) through (3): (1) a dihydroxybenzene-type developing agent; (2) 0.3 mole/liter (developer) or more of a sulfite preservative; and (3) from 0.01 to 0.30 mole/liter (developer) of a compound of formula (A) in which R 2 represents an alkyl group having from 3 to 6 carbon atoms; R 3 and R 4 each represents an alkyl or hydroxyalkyl group having from 1 to 10 carbon atoms. The formed negative images are of high contrast and are almost free from silver stain. The sensitivity and the dot image quality is good.
摘要:
A silver halide photographic material containing a hydrazine derivative of the general formula (I): wherein R 1 is a substituted or unsubstituted aryl group, is developed with high contrast by the use of an aqueous alkaline developer having a pH value of 10.5to 12.3 and comprising the following components (1) through (5): (1) a dihydroxybenzene type developing agent; (2) a p-aminophenol type developing agent; (3) at least 0.3 mol/l of a sulfite preservative; (4) 0.05 to 0.30 mol/l of an alkanolamine of the general formula (II): where R 2 is a hydroxyalkyl group having 2 to 10 carbon atoms; and ( 5 ) 10- 4 to 10 -2 mol/l of a mercapto compound of the general formula (III); where M 1 and M 2 are the same or different and each is a hydrogen atom, an alkali metal atom or an ammonium group; whereby a negative image of high contrast may be formed on said photographic material.
摘要:
A silver halide photographic material containing a hydrazine derivative of the general formula (I): wherein R 1 is a substituted or unsubstituted aryl group, is developed with high contrast by the use of an aqueous alkaline developer having a pH value of 10.5to 12.3 and comprising the following components (1) through (5):
(1) a dihydroxybenzene type developing agent; (2) a p-aminophenol type developing agent; (3) at least 0.3 mol/l of a sulfite preservative; (4) 0.05 to 0.30 mol/l of an alkanolamine of the general formula (II): where R 2 is a hydroxyalkyl group having 2 to 10 carbon atoms; and ( 5 ) 10- 4 to 10 -2 mol/l of a mercapto compound of the general formula (III); where M 1 and M 2 are the same or different and each is a hydrogen atom, an alkali metal atom or an ammonium group; whereby a negative image of high contrast may be formed on said photographic material.
摘要:
Disclosed is a silver halide photographic light-sensitive material wherein a silver halide emulsion layer and/or a hydrophilic colloid layer contains at least one hydrazine derivative, and a silver halide emulsion is spectrally sensitized with a particular dye, and which contains a benzotriazol compound. There is provided a silver halide photographic light-sensitive material that exhibits superior residual color property and can provide stable photographic performance even after a long term running with a reduced silver amount.
摘要:
An image formation process is provided which includes developing a silver halide photographic light-sensitive material using a developing solution having a pH of 9.0 or above but less than 11.0. The silver halide photographic light-sensitive material has at least one silver halide emulsion layer on a support, and another hydrophilic colloid layer. At least one type of hydrazine derivative and at least one type of compound represented by formula (1) are contained in at least one layer of the emulsion layer and the hydrophilic colloid layer, wherein M represents hydrogen, an alkali metal, or a protecting group that can be cleaved by an alkali, and R 11 , R 12 , and R 13 may be identical to or different from each other and independently represent a hydrogen atom, a substituted or unsubstituted alkyl group, a substituted or unsubstituted aryl group, a halogen atom, a nitro group, a substituted or unsubstituted alkoxy group, or a cyano group.
摘要:
An image formation process is provided which includes developing a silver halide photographic light-sensitive material using a developing solution having a pH of 9.0 or above but less than 11.0. The silver halide photographic light-sensitive material has at least one silver halide emulsion layer on a support, and another hydrophilic colloid layer. At least one type of hydrazine derivative and at least one type of compound represented by formula (1) are contained in at least one layer of the emulsion layer and the hydrophilic colloid layer, wherein M represents hydrogen, an alkali metal, or a protecting group that can be cleaved by an alkali, and R 11 , R 12 , and R 13 may be identical to or different from each other and independently represent a hydrogen atom, a substituted or unsubstituted alkyl group, a substituted or unsubstituted aryl group, a halogen atom, a nitro group, a substituted or unsubstituted alkoxy group, or a cyano group.
摘要:
A method of forming a black-and-white image of very high contrast having a gamma value of 8 or above is disclosed, using a negative imagewise exposed photosensitive material comprising a support having thereon at least one hydrophilic colloid layer, at least one layer which is a silver halide emulsion layer, at least one of said hydrophilic colloid layer containing a hydrazine derivative represented by formula (I), comprising processing the photosensitive material with a developer having a pH of 11.2 or lower, said developer being substantially free from benzotriazoles to thereby provide a wide exposure latitude and steady image formability: wherein R1 represents an aliphatic group or an aromatic group; R2 represents a hydrogen atom, an alkyl group, an aryl group, an alkoxy group, an aryloxy group, an amino group, a carbamoyl group or an oxycarbonyl group; G1 represents a carbonyl group, a sulfonyl group, a sulfoxy group, or an iminomethylene group; and each of A1 and A2 represents a hydrogen atom, or one of A1 and A2 is a hydrogen atom and the other is an alkylsulfonyl group, an arylsulfonyl group, or an acyl group.
摘要:
A method of forming a black-and-white image of very high contrast having a gamma value of 8 or above is disclosed, using a negative imagewise exposed photosensitive material comprising a support having thereon at least one hydrophilic colloid layer, at least one layer which is a silver halide emulsion layer, at least one of said hydrophilic colloid layer containing a hydrazine derivative represented by formula (I), comprising processing the photosensitive material with a developer having a pH of 11.2 or lower, said developer being substantially free from benzotriazoles to thereby provide a wide exposure latitude and steady image formability: wherein R₁ represents an aliphatic group or an aromatic group; R₂ represents a hydrogen atom, an alkyl group, an aryl group, an alkoxy group, an aryloxy group, an amino group, a carbamoyl group or an oxycarbonyl group; G₁ represents a carbonyl group, a sulfonyl group, a sulfoxy group, or an iminomethylene group; and each of A₁ and A₂ represents a hydrogen atom, or one of A₁ and A₂ is a hydrogen atom and the other is an alkylsulfonyl group, an arylsulfonyl group, or an acyl group.