Classifications

• • G—PHYSICS
  • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
  • G03C—PHOTOSENSITIVE MATERIALS FOR PHOTOGRAPHIC PURPOSES; PHOTOGRAPHIC PROCESSES, e.g. CINE, X-RAY, COLOUR, STEREO-PHOTOGRAPHIC PROCESSES; AUXILIARY PROCESSES IN PHOTOGRAPHY
  • G03C7/00—Multicolour photographic processes or agents therefor; Regeneration of such processing agents; Photosensitive materials for multicolour processes
  • G03C7/30—Colour processes using colour-coupling substances; Materials therefor; Preparing or processing such materials
  • G03C7/32—Colour coupling substances
  • G03C7/34—Couplers containing phenols
• • G—PHYSICS
  • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
  • G03C—PHOTOSENSITIVE MATERIALS FOR PHOTOGRAPHIC PURPOSES; PHOTOGRAPHIC PROCESSES, e.g. CINE, X-RAY, COLOUR, STEREO-PHOTOGRAPHIC PROCESSES; AUXILIARY PROCESSES IN PHOTOGRAPHY
  • G03C7/00—Multicolour photographic processes or agents therefor; Regeneration of such processing agents; Photosensitive materials for multicolour processes
  • G03C7/30—Colour processes using colour-coupling substances; Materials therefor; Preparing or processing such materials
  • G03C7/305—Substances liberating photographically active agents, e.g. development-inhibiting releasing couplers
  • G03C7/30511—Substances liberating photographically active agents, e.g. development-inhibiting releasing couplers characterised by the releasing group
  • G03C7/30517—2-equivalent couplers, i.e. with a substitution on the coupling site being compulsory with the exception of halogen-substitution
  • G03C7/30523—Phenols or naphtols couplers

Definitions

• the present invention concerns a silver halide color photosensitive material.
• Silver halide color photosensitive material is generally processed fundamentally in a color developing step and a desilvering step.
• exposed silver halide is reduced by a color developing agent to produce silver, while the oxidized color developing agent reacts with a coupler to provide a dyed image.
• the thus formed silver is oxidized with a bleaching agent in the succeeding desilvering step and further undergoes the effect of a fixing agent into a soluble silver complex which is then removed by dissolution.
• JP-A As a method of increasing the bleaching power, Research Disclosure Item Nos. 24241 and 11449 and JP-A-­61-201247 (the term “JP-A” as used herein means an "unexamined published Japanese patent application”) describe couplers of bleach accelerating compound releasing type, and it has been known that the desilvering performance can be improved by using a silver halide color photosensitive material containing such a coupler of bleach accelerating compound releasing type.
• JP-A-61-201247 concerning a coupler of the bleach accelerating compound releasing type described above, a phenol type cyan coupler having a 4-­cyanophenylureido group at the 2-position is used as a kind of the cyan image-forming coupler effective to such a reproducibility.
• the coupler having a 2-ureido substi­tuted phenol nuclei as described in JP-A-61-201247 can compensate the foregoing drawbacks, it results in additional drawbacks such as increased color residue of sensitizing dye upon applying high speed processing or low replenishing processing, or poor coupling activity of the coupler.
• the present invention has been achieved with an aim of overcoming such additional problems described above in a silver halide color photosensitive material containing a bleaching accelerator releasing coupler.
• the second object of the present invention is to provide a novel desilvering accelerator releasing coupler having excellent coupling activity and not causing increase in the minimum image density.
• This novel coupler should also increase the processing speed, decrease replenisher, and save water washing for the processing.
• a silver halide color photosensitive material comprising at least one silver halide emulsion layer on a support, which contains at least one bleaching accelerator releasing type coupler represented by the following Formula (I): wherein R1 is selected from the group consisting of a halogen atom, an aliphatic group, an aromatic group, a heterocyclic group, an amidino group, a guanidino group, R2 represents a halogen atom, a hydroxyl group, a carboxyl group, a sulfo group, an amino group, a cyano group, a nitro group, an aliphatic group, an aromatic group, a carbonamido group, a sulfonamido group, a carbamoyl group, a sulfamoyl group, a ureido group, an acyl group, an acyloxy group, an aliphatic oxy group, an aromatic oxy group, an aliphatic thio group,
• R7 is selected from the group consisting of an aliphatic group, an aromatic group and a heterocyclic group
• R8 is selected from the group consisting of a hydrogen atom, an aliphatic group, an aromatic group and a heterocyclic group
• R9 and R10 are both selected independently from the group consisting of a hydrogen atom, an aliphatic group, an aromatic group, a heterocyclic group, an acyl group, an aliphatic sulfonyl group and an aromatic sulfonyl group.
• each R2 may be identical to or different from the other(s), or an R2 may join with another R2 to form a ring. Further, an R2 may form a dimer or higher polymeric form (oligomer or polymer) which is bonded by way of a divalent or higher valent group in any of R1, R2, or R3.
• a method of processing a silver halide color photosensitive material wherein a silver halide color photosensitive material comprising at least one silver halide emulsion layer on a support and containing at least one bleach accelerator releasing type coupler represented by Formula (I) is processed in a bleach-fix bath without water washing after color development.
• a method of processing a silver halide color photosensitive material comprising a step of applying water washing or stabilization directly after the fixing or bleach-fix processing to the silver halide color photosensitive material, which material has at least one silver halide emulsion layer on a support and contains at least one bleach accelerator releasing type coupler represented by Formula (I);
• the water washing or the stabilization step includes a plurality of vessels and, upon replenishing a processing solution in a multistage countercurrent system, the replenishing amount is from 0.1 to 50 times of the amount of the processing solution carried from the preceeding bath per unit area of the silver halide color photosensitive material to be processed.
• Any aliphatic group used in the compounds of the present invention may be linear, branched or cyclic alkyl groups, alkenyl groups or alkynyl groups which may be substituted or unsubstituted.
• Aromatic group of the present invention may be substituted or unsubstituted aryl groups including a condensed ring.
• Heterocyclic rings may be a substituted or unsubstituted, single or condensed heterocyclic ring.
• aliphatic groups suitable for the present invention can include methyl, ethyl, n-propyl, i-propyl, n-butyl, i-­butyl, t-butyl, cyclopentyl, t-pentyl, cyclohexyl, n-­octyl, 2-ethylhexyl, n-decyl, n-dodecyl, n-tetradecyl, n-hexadecyl, n-octadecyl, 2-hexyldecyl, adamantly, trifluoromethyl, carboxymethyl, methoxyethyl, vinyl, allyl, hydroxyethyl, heptafluoropropyl, benzyl, phenetyl, phenoxyethyl, methylsulfonylethyl, methane sulfonamide
• aromatic groups suitable for the present invention can include phenyl, p-tolyl, m-tolyl, o-tolyl, 4-chlorophenyl, 4 nitrophenyl, 4-­cyanophenyl, 4-hydroxyphenyl, 3-hydroxyphenyl, 1-­naphthyl, 2-naphthyl, o-biphenyl, p-biphenyl, penta­fluorophenyl, 2-methoxyphenyl, 2-ethoxyphenyl, 4-­methoxyphenyl, 4-t-butylphenyl, 4-t-octylphenyl, 4-­carboxyphenyl, 4-methane sulfoneamidephenyl, 4-(4-­hydroxyphenylsulfonyl)phenyl, 2-n-tetradecyloxyphenyl, 4-n-tetradecyloxyphenyl, 2-chloro-5-n-dodecyloxyphen
• heterocyclic ring suitable for the present invention can include 2-­pyridyl, 3-piridyl, 4-piridyl, 2-furyl, 2-thienyl, 3-­thienyl, 4-quinolyl, 2-imidazolyl, 2-benzimidazolyl, 4-­pyrazolyl, 2-benzoxazolyl, 2-benzothiazolyl, 1-imidazol­yl, 1-pyrazolyl, 5-tetrazolyl, 1,3,4-thiadiazol-2-yl, 2-­prolyl, 3-triazolyl, 4-oxazolyl, 4-thiazolyl, 2-pyrimid­yl, 1,3,5-triazine-2-yl, 1,3,4-oxadiazol-2-yl, 5-­pyrazolyl, 4-pyrimidyl, 2-pyrazyl, succinimido, phthal­ imido, morpholino, pyrroridino, piperidino, imidazolid­ine-2,4-di-
• R1 represents a halogen atom, an aliphatic group, an aromatic group, a heterocyclic group, an amidino group, a guanidino group or the group represented by wherein R4 and R5 each representsan aliphatic group with 1 to 30 carbon atoms, an aromatic group with 6 to 30 carbon atoms, a heterocyclic group with 1 to 30 carbon atoms, an amino group with 0 to 30 carbon atoms (for example, amino, methylamino, dimethylamino, n-butylamino, anilino, N-(2-­n-tetradecyloxyphenyl)amino, pyrolidino, morpholino, piperidino, 2-ethylhexylamino, n-dodecylamino, N-methyl-­N-dodecylamino, 3 dodecyloxypropylamino, 3-(2,4-di-t-­pentylphen
• R4 and R5 may join with each other to form a ring.
• the halogen atom can include e.g., fluorine atom, chlorine atom, bromine atom or iodine atom.
• R1 represents an amidino group or guanidino group
• the number of carbon atoms thereof is from 1 to 30 which may be substituted with an aliphatic group, an aromatic group, a hydroxyl group, an aliphatic oxy group, an acyl group, an aliphatic sulfonyl group, an aromatic sulfonyl group, an acyloxy group, an aliphatic sulfonyloxy group or an aromatic sulfonyloxy group, or two nitrogen atoms may join with each other to form a heterocyclic ring such as imidazole or benzimidazole.
• R2 represents a halogen atom, (for example, fluorine, chlorine, bromine or iodine), a hydroxyl group, a carboxyl group, a sulfo group, a cyano group, a nitro group, an amino group with 0 to 30 carbon atoms (for example, amino, methylamino, dimethylamino, pyrrolidino, anilino), an aliphatic group with 1 to 30 carbon atoms, an aromatic group with 6 to 30 carbon atoms, a carbonamido group with 1 to 30 carbon atoms (for example, formamido, acetoamido, trifluoro­acetoamido, benzoamido), a sulfonamido group with 1 to 30 carbon atoms (for example, methane sulfonamido, trifluoromethane sulfonamido, n-butane sulfonamido, p-
• R3 represents a hydrogen or R6Y, in which R6 represents a hydrogen atom, an aliphatic group with 1 to 30 carbon atoms, an aromatic group with 6 to 30 carbon atoms, a heterocyclic group with 1 to 30 carbon atoms, or an imido group with 4 to 30 carbon atoms (for example, succinimido, maleinimido, phthalimido, diacetylimido);
• Y represents, for example, -R9, -CO-, -SO2-, -SO- or single bond
• R7 represents an aliphatic group with 1 to 30 carbon atoms, an aromatic group with 6 to 30 carbon atoms or a heterocyclic group with 1 to 30 carbon atoms
• R8 represents a hydrogen atom, an aliphatic group with 1 to 30 carbon atoms, aromatic group with 6 to 30 carbon atoms or a heterocyclic group with 1 to 30 carbon atoms
• R9 and R10 represent independently a hydrogen atom, an ali
• the group represented by LINK may or may not be used in the present invention. It is better not used the group but it may be properly selected depending on the purposes.
• the group represented by LINK the following known functional linkage groups, etc. may be included:
• Typical examples of the Substituent suitable for use as R11, R12, or R13 are R15 group, R15CO- group, R15SO2- group, group or group.
• R15 represents an aliphatic group, an aromatic group or a heterocyclic group
• R16 represents a hydrogen atom, an aliphatic group, an aromatic group or a heterocyclic group.
• R11, R12, R13 can represent a divalent group, and any two of R11, R12 and R13 can be joined to form a cyclic structure.
• Specific examples of the group represented by the Formula (T-1) are set forth below. However, the present invention shall not be construed as being limited to these examples.
• Nu represents a nucleophilic group in which an oxygen atom or a sulfur atom is an example of the nucleophilic species
• E represents an electrophilic group capable of cleaving the bonding with the symbol ** upon nucleophilic attack from Nu.
• LINK represents a linkage group for sterically relating Nu and E such that they can conduct an intramolecular nucleophilic substitution reaction. Specific examples of the groups represented by Formula (T-2) are described below, but the present invention not be construed as being limited thereto.
• JP-A-57-­56837 JP-A-60-214358, JP-A-60-218645, JP-A-60-229030 and JP-A-61-156217 and specific examples can include the following groups, the present invention not being limited thereto:
• L represents a (n+1) valent group, that is, those groups formed by removing n number of hydrogen atoms from linear, branched or cyclic alkyl group with 1 to 8 carbon atoms, an aromatic group with 6 to 10 carbon atoms which may be substituted with a halogen atom or an alkyl group, or a heterocyclic group with 1 to 10 carbon atoms (for example, tetrazol-1-yl, 1,3,4-triazol-1-yl, 2-methyl-1,3,4-triazol-1-yl, 1,3,4-­thiadiazol-2-yl, 1,3,4 oxadiazol-2-yl, 1,3,4 triazol-2-­yl, 1-methyl-1,3,4-triazol-2-yl, thiazol-2-yl, oxazol-2-­yl, imidazol-2-yl, 1-methylimidazol-2-yl, pyrimidin-2-yl respectively); X represents a water soluble
• the groups represented by X are those groups with not more than 8 carbon atoms, for example, carboxyl group, sulfo group, hydroxyl group, amino group, alkoxy group, carbonamido group, sulfon­amido group, carbamoyl group, sulfamoyl group, ureido group, sulfamyl group, acryl group, amidino group, alkylsulfonyl group, phosphono group, phosphonooxy group, or those groups containing at least one of these of aforementioned groups.
• R2 and R3 or a plurality of R2 may join with each other to form a ring.
• R is preferably a halogen atom, -COR4 or -SO2R4, and the case in which R4 represents an amino group is further preferred.
• Examples of -COR4 can include, carbamoyl, N-­ethylcarbamoyl, N-n-butylcarbamoyl, N-cyclohexyl­carbamoyl, N-(2-ethylhexyl)carbamoyl, N-dodecyl­carbamoyl, N-hexadecylcarbamoyl, N-(3-decyloxypropyl)­ carbamoyl, N-(3-dodecyloxypropyl)carbamoyl, N-(3-(2,4-­di-t-pentylphenoxy)propyl)carbamoyl, N-(4-(2,4-di-t-­pentylphenoxy)butyl)carbamoyl, N,N-dimethylcarbamoyl, N,N-dibutylcarbamoyl, N-
• Examples of -SO2R4 can include sulfamoyl, N-methylsulfamoyl, N,N-diethyl­sulfamoyl, N,N-diisopropylsulfamoyl, N-(3-dodecyloxy­propyl)sulfamoyl, N-(3-(2,4-di-t-pentylphenoxy)propyl)­sulfamoyl, N-(4-(2,4-di-t-pentylphenoxy)butyl)sulfamoyl, pyrrolidinosulfonyl, N-phenylsulfonyl, N-(2-butoxy­phenyl)sulfamoyl and N-(2-tetradecyloxyphenyl)sulfamoyl.
• R1, -COR4 in which R4 is an amino group is particularly preferred.
• R2 is preferably a halogen atom, an aliphatic group, an aliphatic oxy group, a carbonamido group, a sulfonamido group, a cyano group, etc.; a fluorine atom, a chlorine atom, a trifluoromethyl group, a methoxy group or a cyano group being particularly preferred.
• the substitution position of R2 is preferably at the 2-position of the 4-­position relative to R3NH-.
• R6 is preferably an aliphatic group, an aromatic group, -OR7 or -SR7; Y is preferably -CO- or -SO2.
• the aliphatic group can include: e.g., methyl, trifluoromethyl, trichloromethyl, ethyl, heptafluoropropyl, t-butyl, 1-ethylpentyl, cyclohexyl, benzyl, undecyl, tridecyl and 1-(2,4-di-t-­pentylphenoxy)propyl.
• aromatic group can include: e.g., phenyl, 1-naphthyl, 2-naphthyl, 2-­chlorophenyl, 4-methoxyphenyl, 4-nitrophenyl and pentafluorophenyl.
• Examples of -OR7 can include: e.g., methoxy, ethoxy, isopropoxy, n-butoxy, isobutoxy, t-­butoxy, n-pentyloxy, n-hexyloxy, n-octyloxy, 2-­ethylhexyloxy, n-decyloxy, n-dodecyloxy, 2-methoxy­ethoxy, benzyloxy, trichloroethoxy, trifluoroethoxy, phenoxy and p-methylphenoxy.
• Examples of -SR7 can include: e.g., methylthio, ethylthio, allylthio, n-­butylthio, benzylthio, n-dodecylthio, phenylthio, p-t-­octylphenylthio, p-dodecylphenylthio, and p-­octyloxyphenylthio.
• R3 is, more preferably, an aliphatic oxy carbonyl group in which R6 is R7O and Y is -CO-, or an aliphatic or aromatic sulfonyl group in which R6 is an aliphatic or aromatic group and Y is -SO2-.
• R3 is most preferably an aliphatic oxy carbonyl group.
• L is preferably an alkylene group or heterocyclic group, more preferably, an alkylene group.
• X is, preferably, a substituent in which ⁇ -substituent constant is 0.5 or less, preferably, the substituent constant has a negative value.
• the value is determined by the method as described in "Substituent Constants for Correlation Analysis in Chemistry and Biology" written by C. Hansch and A. Leo, published by John Wiley, 1979. Examples of X and ⁇ -substituent constants (within ( )) are shown below.
• n is preferably 1 or 2 and, more preferably, 1.
• -S-L-(X) n is represented by the following Formula (II): wherein R17 and R18 represent a hydrogen atom or an alkyl group with 1 to 4 carbon atoms, p represents an integer of 1 to 8, and Z represents a hydroxyl group, a carboxyl group, a sulfo group or an amino group with 0 to 8 carbon atoms (for example, amino, methylamino, ethyl­amino, methoxyethylamino, butylamino, dimethylamino, di­ethylamino, dipropylamino, diisopropylamino, dibutyl­amino, diisobutylamino, piperidino, pyrrolidino, morpholino).
• R17 and R18 represent a hydrogen atom or an alkyl group with 1 to 4 carbon atoms
• p represents an integer of 1 to 8
• Z represents a hydroxyl group, a carboxy
• the coupler represented by Formula (I) may form a dimer or higher polymer jointed with another by way of divalent or higher valent groups at the substituents R1, R2 and R3 respectively.
• the range for the number of carbon atoms shown for each of the substituents as described above may beyond the scope of the above definition.
• the coupler represented by the Formula (I) forms a polymer
• typical examples thereof include a homopolymer or copolymer of addition polymerizable ethylenically unsaturated compounds having cyan dye forming coupler residue (cyan color forming monomer).
• the polymer contains repeating units of Formula (III) and one or more of cyan color-­forming repeating units represented by Formula (III) may be contained in the polymer and it may be a copolymer containing one or more of the non-color-forming ethylenic monomer as the copolymerization ingredient.
• R represents a hydrogen atom, an alkyl group with 1 to 4 carbon atoms or a chlorine atom;
• A represents -CONH-, -COO- or a substituted or unsubstituted phenylene group;
• B represents a substituted or unsubstituted alkylene group, a phenylene group or an aralkylene group;
• L′ represents -CONH-, -NHCONH-, -NHCOO-, -NHCO-, -OCONH-, -NH-, COO-, -OCO-, -CO-, -O-, -SO2-, -NHSO2- or -SO2NH-.
• a, b, c represents 0 or 1.
• Q represents a cyan coupler residue formed by removing other hydrogen atoms than the hydrogen atom at the hydroxy group on 1-position from the compound represented by Formula (I).
• a copolymer of the cyan color forming monomer giving the coupler unit of Formula (III) with the following non-color-forming ethylenic monomer is preferred.
• the non-color-forming ethylenic monomer which is not coupled with oxidation products of an aromatic primary amine developing agent, can include: acrylic acid; ⁇ -chloroalkylacrylic acid; ⁇ -alkylacrylic acid (for example, methacryl acid), esters or amides derived from these acrylic acids (for example, acrylamide, meth­acrylamide, n-butylacrylamide, t-butylacrylamide, diacetoneacrylamide, N-methylolacrylamide, N-(1,1-­dimethyl-2-sulfonatoethyl)acrylamide, N-(3-sulfonato­propyl)acrylamide, methylacrylate, ethylacrylate, n-­propylacrylate, n-butylacrylate, t-butylacrylate, iso­butylacrylate, acetoacetoxyethylacrylate, n-­hexylacrylate, 2 ethylhex
• Acrylic acid ester, methacrylic acid ester and maleic acid esters are particularly preferred.
• Two or more of the non-color forming ethylenic monomers can be used together.
• the following combinations can be used: methyl acrylate and butyl acrylate, butyl acrylate and styrene, butyl methacrylate and methacrylic acid, methylacrylate and diacetone acrylamide, N-(1,1-­dimethyl-2-sulfonatoethyl)acrylamide and acrylic acid, potassium styrene sulfinate and N-vinylpyrrolidone.
• the ethylenically unsaturated monomer for copolymerization with a vinylic monomer corresponding to Formula (III) described above can be selected such that preferred effect can be given to the copolymer formed with respect to physical properties and/or chemical properties of the copolymer, such as solubility, compatibility with a binder for the photographic colloid composition (for example, gelatin), flexibility, heat stability, etc.
• oleophilic polymer coupler soluble in organic solvent
• the emulsion of the cyan polymer coupler for use in this invention may be prepared by emulsion-dispersing a solution of the oleophilic coupler obtained by the polymerization of the vinylic monomer giving the coupler unit dissolved in an organic solvent in an aqueous gelatin solution as the form of latex or may be prepared by a direct emulsion polymerization method.
• hydrophilic polymer coupler soluble in neutral or alkaline water
• hydrophilic non color forming ethylenic monomer such as N-(1,1-­dimethyl-2-sulfonatoethyl)acrylamide, 3-sulfonate propylacrylate, sodium styrenesulfonate, potassium 2-­styrene sulfinate, propylacrylate, methacrylamide, acrylic acid, methacrylic acid, N-vinylpyrrolidone and N-vinylpyridine.
• the hydrophilic polymer coupler can be added as an aqueous solution to a coating liquid, and it is also possible to add after being dissolved in a mixed solvent of water miscible organic solvent such as lower alcohol tetrahydrofuran, acetone, ethyl acetate, cyclohexane, ethyl lactate, dimethyl formamide or dimethylacetoamide and water.
• a mixed solvent of water miscible organic solvent such as lower alcohol tetrahydrofuran, acetone, ethyl acetate, cyclohexane, ethyl lactate, dimethyl formamide or dimethylacetoamide and water.
• the coupler may be added after being dissolved in an aqueous alkali solution or alkali-­containing organic solvent.
• a small amount of surface active agent may be added.
• the compounds represented by Formula (I) can be synthesized according to the method, for example, as described in EP-A-161626, and JP-A-61-201247, etc. Further, the compound having the functional linkage group can be synthesized according to the methods as described in those patent literatures set forth above for the explanation of the functional linkage groups, for example, U.S. Patents 4,146,396, 4,246,962, 4,409,323 and 4,421,845.
• R′ represents -L-(X) n or a precursor thereof and G represents a group capable of splitting by a nucleophilic substitution reaction, for example, a halogen atom, a nitro group, a sulfonyl group and a sulfonyloxy group.
• R′ has the same meaning as R′ in (I) above and V represents a halogen atom, an amino group, an imido group, an alkyl, an aryl or a heterocyclic thio group, an amidinothio group or sulfonyl group, etc.
• 5-isobutoxycabonylamino-1-hydroxy-N-(3-dodecyl­oxy propyl)-2-naphthoamide was dissolved by 26.4 g into 300 ml of methylene chloride and cooled to 0°C, to which 6.8 g of sulfuryl chloride was dropped under stirring for about 10 min. After stirring for one hour, the solution of methylene chloride was washed with 300 ml of water and then concentrated under a reduced pressure.
• the fractionated developing solution was concentrated to obtain 18.6 g of the oily object of the synthesis exemplified compound (5), that is, 5-isobutoxycarbonylamino-4-(2-N,N-dimethylamino ethylthio)-1-hydroxy-N-(3-dodecyloxypropyl)-2-naphtho­amide. Yield: 5.9%.
• the addition amount of the bleach accelerator releasing type coupler represented by Formula (I) according to the present invention to the photosensitive material is preferably from 1 ⁇ 10 ⁇ 7 mol to 1 ⁇ 10 ⁇ 1 mol, particularly, from 1 ⁇ 10 ⁇ 6 mol to 5 ⁇ 10 ⁇ 2 mol per m2 of the photosensitive material. While the bleach accelerator releasing compound according to the present invention can be added to any of the layers in the photosensitive material, it is preferred to add it to the photo­sensitive emulsion layer, particularly, a red-sensitive emulsion layer.
• silver halide color photosensitive material used in the present invention for the emulsion layer in the photosensitive material.
• Any of silver halides that is, silver bromide, silver iodobromide, silver chlorobromide, silver chloroiodobromide, silver chloride and silver chloroiodide may be used, but the use of silver iodobromide is particularly preferred.
• silver iodobromide silver iodide content is usually less than 40 mol%, preferably, less than 20 mol% and more preferably, less than 10 mol%.
• the silver halide grains may be so-called regular grains having a regular crystal body such as hexahedron, octahedron, tetradecahedron, etc. or those of irregular crystal forms such as spheres, those having crystal defects such as twine planes or mixed forms thereof. Furthermore, a mixture of grains of various crystal forms may be used.
• the silver halide may either be a monodispersed emulsion having a narrow distribution or polydispersed emulsion having a broad distribution.
• tabular grains with the aspect ratio of 5 or greater may be used.
• the crystal structure of the emulsion grains may be uniform or those having a halogen composition different between the inside and the outside or it may be a layered structure. These emulsion grains are disclosed, for example, in British Patent 1,027,146, U.S. Patents 3,505,068, 4,444,877 and JP-A-60-143331. Silver halides of different compositions may be joined by epitaxial junction, or may be joined with other compounds than silver halide such as silver rhodanate or lead oxide.
• the emulsion described above may be (A) a surface latent image type whereby latent images are formed mainly on the surface of the grains, or (B) an internal latent image type whereby latent images are formed to the inside of the grains, or (C) a type whereby the latent images are formed both on the surface as well as to the inner side of the grains. Grains in which the inside thereof is chemically sensitized may be used.
• Silver halide photographic emulsion usable in the present invention can be produced by properly using a known method.
• the emulsion can be prepared according to the method as described in Research Disclosure vol. 176, No. 17643 (December 1978), pages 22 to 23, "Emulsion Preparation and Types", vol 187, No. 18716 (November 1979), page 648.
• typical silver halide grains have the average grains size of not less than about 0.1 m in which at least 95% by weight thereof is within ⁇ 40% of the average grain size.
• Those emulsions with the average grain size from 0.25 to 2 ⁇ m in which at least 95% by weight of the number of grains of silver halide grains are within the range of average grain size ⁇ 20% can be used.
• cadmium salt, zinc salt, lead salt, thalium salt, irridum salt or complex thereof, rhodium salt or complex thereof, iron salt or a complex salt may be present alone or with other of the above mentioned salts.
• the emulsion used in the present invention is usually subjected to chemical ripening and spectral sensitization after the physical ripening.
• various color couplers can be used in addition to the cyan image forming coupler of the Formula (I) and specific examples thereof are described in patent literatures set forth in the Research Disclosure (RD) No. 17643, VII-C to G.
• the color forming coupler those couplers giving three primary colors by subtractive color process (that is, yellow, magenta and cyan) by color development are important, and the following couplers can be used preferably in the present invention in addition to the diffusion resistant 4-equivalent or 2-equivalent coupler specifically described in the patent literatures set forth in Research Disclosure No. 17643, VII-C and D.
• Typical examples of the yellow couplers usable herein can include known oxygen atom releasing type yellow coupler or nitrogen atom releasing type yellow coupler.
• ⁇ -Pivaloyl acetoanilide type coupler is excellent in the fastness of color forming dye, particularly, light fastness, whereas ⁇ -benzoyl aceto­anilide type coupler can provide high color forming density.
• the magenta coupler usable in the present invention can include hydrophobic 5-pyrazolone type and pyrazoloazole type coupler having ballast group.
• the 5-pyrazolone type couplers those substituted at the 3-position with aryl amino group or acyl amino group are preferred in view of the hue and the color forming density of the color forming dye.
• the cyan coupler usable in the present invention can further include hydrophobic and diffusion resistant naphthol and phenol type couplers, and 2-equivalent naphthol type coupler of the oxygen atom releasing type can be mentioned as preferred typical examples.
• those couplers capable of forming cyan dye fast to humidity and temperature are preferably used and typical examples thereof can include phenol type cyan coupler having ethyl or higher alkyl group at the meta-­position of the phenol nuclei and 2,5-diacrylamino substituted phenol type coupler, phenol type coupler having phenyl ureido group at the 2-position and diacylamino group at the 5-position as described in U.S. Patent 3,772,002, and 5-amidonaphthol type cyan coupler as described in EP-A-161626.
• a coupler in which the color forming dye has an adequate diffusing property may be used together to improve the granular property.
• specific examples of the magenta coupler are found in U.S. Patent 4,366,237, etc. and specific examples of yellow, magenta or cyan coupler are found in European Patent 96,570, etc.
• the dye-forming coupler and the particular coupler described above may form a dimer or a higher polymer.
• Typical examples of polymerized dye-forming coupler are described in U.S. Patent 3,451,820, etc.
• Specific examples of polymerized magenta coupler are described in U.S. Patent 4,367,282.
• Couplers releasing a photographically useful residual group upon coupling can also be used preferably in the present invention.
• DIR coupler releasing development inhibitors those patented couplers described in RD 17643, VII-F (described above) are useful.
• couplers releasing a nucleating agent, development accelerator or precursor thereof upon development imagewise can be used for the photosensitive material according to the present invention. Specific examples of such compounds are described in British Patent 2,097,140 and 2,131,188. In addition, it is possible to use DIR redox compound releasing coupler as described in JP-A-60-185950, etc. and couplers releasing dyes restoring color after splitting as described in EP-­A-173302.
• the coupler used in the present invention can be introduced into the photosensitive material by various known dispersion methods. Examples of high boiling point organic solvents used for the oil in-water droplet dispersion method are described in U.S. Patent 2,322,027. Steps and effect of the latex dispersion method and specific examples of latex for impregnation are described in U.S. Patent 4,199,363, German Patent Application (OLS) Nos. 2,541,274 and 2,541,230.
• the photosensitive material used in the present invention may also contain hydroquinone derivatives, aminophenol derivatives, amines, gallic acid deriva­tives, catechol derivatives, ascorbic acid derivatives, non-coloring couplers, sulfonamido phenol derivatives, etc. as an anti-color fogging agent or anti color mixing agent.
• Known anti-discoloration agent may be used for the photosensitive material used in the present invention.
• Typical examples of known anti-discoloration agents can include, for example, hydroquinones, 6-­hydroxychromans, 5-hydroxycumarans, spirochromans, p-­alkoxyphenols, hindered phenols such as bisphenols, gallic acid derivatives, methylene dioxybenzenes, aminophenols, hindered amines and ether or ester derivatives obtained by silylating or alkylating phenolic hydroxy groups in each of the compounds.
• metal complexes typically represented by (bissalicylaldoxymato)nickel complex and (bis-N,N-­dialkyldithiocarbamato)nickel complex may also be used.
• the photographic emulsion layer and other layers are coated on a typical flexible support such as plastic films.
• the photographic emulsion layer and other hydrophilic colloid layers can be coated by utilizing various known coating methods, for example, dip coating, roller coating, curtain coating and extrusion coating.
• the present invention can be applied to various color photosensitive materials. Typical examples thereof can include general-purpose or cinema use color negative films, color reversal film for slide or television use, color paper, color positive film, color reversal paper, etc.
• the color developer used for the development of the photosensitive material according to the present invention is an aqueous alkaline solution using an aromatic primary amine color developing agent as the main ingredient.
• aminophenol type compound is also useful as the color developing agent
• p-phenylene diamine compound is preferably used and typical examples thereof can include 3-methyl-4-amino-N,N-diethylaniline, 3-methyl-4-amino-N-ethyl-N- ⁇ -hydroxyethylaniline, 3-­methyl-4-amino-N-ethyl-N- ⁇ -methanesulfonamide ethyl-­aniline, 3-methyl-4-amino-N-ethyl-N- ⁇ -methoxyethyl aniline, as well as sulfate, hydrochloride, phosphate, p-toluene sulfonate, tetraphenyl borate, p-(t octyl) benzene sulfonate
• the aminophenol derivative can include, for example, o-aminophenol, p-aminophenol, 4-amino-2-­methylphenol, 2-amino-3-methylphenol and 2-oxy-3-amino-­1,4-dimethylbenzene.
• the color developer may also contain a pH buffer such as alkali metal carbonate, borate or phosphate; a development inhibitor or anti-foggant such as bromide, iodide, benzoimidazoles, benzothiazoles, and mercapto compounds; a preservative such as hydroxylamine, tri­ethanol amine, compounds described in German Patent Application (OLS) No.
• a pH buffer such as alkali metal carbonate, borate or phosphate
• a development inhibitor or anti-foggant such as bromide, iodide, benzoimidazoles, benzothiazoles, and mercapto compounds
• a preservative such as hydroxylamine, tri­ethanol amine, compounds described in German Patent Application (OLS) No.
• sulfite or hypersulfite an organic solvent such as diethylene glycol; a development promoter such as benzyl alcohol, polyethylene glycol, quaternary ammonium salt, amines, thiocyanate and, 3,6-thiaoctane-1,8-diol; a dye-forming coupler; competing coupler; a nucleating agent such as sodium boronhydride; an auxiliary developing agent such as 1-phenyl-3-pyrazolidone; a tackifier; and a chelating agents such as ethylenediamine tetraacetic acid, nitrilotriacetic acid, cyclohexane diamine tetraacetic acid, iminodiacetic acid, N-­hydroxymethylethylenediamine triacetic acid, diethylenetriamine pentaacetic acid, triethyl­enetetramine hexaneacetic acid and aminopolycarboxylic acid represented by the compounds as described in JP
• aminophosphonic acid such as aminotris(methylene phosphonic acid), ethylenediamine-N,N,N′,N′ tetramethylene phosphonic acid, etc. phosphono carboxylic acid as described in Research Disclosure No. 18170 (May, 1979).
• the color developing agent is used at a concentration of about 0.1 g to about 30 g per one liter of the usual color developer solution, more preferably, at a concentration about from 1 g to about 15 g per one liter of the color developer solution.
• pH value of the color developer is usually 7 or higher and, most generally, about 9 to 13.
• the silver halide color photographic material is applied with color developing treatment as described above after imagewise exposure, and then processed with a processing solution having a bleaching performance.
• the processing solution having the bleaching performance means those processing solutions having a performance of oxidizing metal silver resulted from the developing reaction and colloidal silver contained in the photosensitive material thereby converting them into a soluble silver salt such as silver thiosulfate complex or an insoluble silver salt such as silver bromide, and they can include, for example, bleaching solution, or bleach-fixing solution, etc.
• the bleaching agent used as the processing solution having the bleaching performance in the present invention can include ferric complex salt such as ferricyanate ferric complex salts, citarate ferric salts, etc., and peroxide such as persulfate, hydrogen peroxide, etc.
• ferric complex salt such as ferricyanate ferric complex salts, citarate ferric salts, etc.
• peroxide such as persulfate, hydrogen peroxide, etc.
• aminopolycarboxylic acid ferric complex salt which is a complex of ferric ions with aminopolycarboxylic acid or the salt thereof.
• aminocarboxylic acids and salts thereof can include, for example:
• (1), (2), (6), (7), (10), (11), (16), (18) are particularly preferred.
• the aminocarboxylic acid ferric complex salt may be used in the form of a complex salt, or ferric ion complex salt may be formed in a solution using ferric salt, for example, ferric sulfate, ferric chloride, ferric sulfate, ammonium ferric sulfate and ferric phosphate with aminocarboxylic acid.
• ferric salt for example, ferric sulfate, ferric chloride, ferric sulfate, ammonium ferric sulfate and ferric phosphate with aminocarboxylic acid.
• the complex salt may be used alone or as a mixture of two or more of them.
• one or more of the ferric salts may be used.
• one or more of aminocarboxylic acids may be used.
• aminopolycarboxylic acid may be used in excess amounts for forming the ferric ion complex salts.
• aminopolycarboxylic acid Fe (III) complex salt described above, except for (19), and ethylenediamine tetraacetic acid Fe (III) complex salt may be used in combination.
• the processing solution having the bleaching function containing the ferric complex salt described above may contain metal ion complex salts such as of cobalt, nickel and copper other than iron ions.
• the amount of the bleaching agent per one liter of the processing solution having the bleaching performance according to the present invention is from 0.1 mol to 1 mol, preferably, from 0.2 mol to 0.5 mol.
• the pH value of the bleaching solution is preferably from 4.0 to 8.0 and, particularly, from 5.0 to 7.5.
• the processing bath having the bleaching performance constituting the present invention can contain, in addition to the bleaching agent and the compound as described above, a re-halogenating agent such as bromide, (for example, potassium bromide, sodium bromide, ammonium bromide) or chloride, (for example, potassium chloride, sodium chloride and ammonium chloride).
• a re-halogenating agent such as bromide, (for example, potassium bromide, sodium bromide, ammonium bromide) or chloride, (for example, potassium chloride, sodium chloride and ammonium chloride).
• additives known to be used for tin bleach-fixing solution such as one or more inorganic acid, organic acids and salts thereof having pH buffering performance can be added, for example, nitrate (such as sodium nitrate and ammonium nitrate), boric acid, borax, sodium metaborate, acetic acid, sodium acetate, sodium carbonate, potassium carbonate, phosphorous acid, phosphoric acid, sodium phosphate, citric acid, sodium citrate and tartaric acid.
• nitrate such as sodium nitrate and ammonium nitrate
• boric acid borax
• sodium metaborate sodium metaborate
• acetic acid sodium acetate
• sodium carbonate potassium carbonate
• phosphorous acid phosphoric acid
• sodium phosphate citric acid
• citric acid sodium citrate and tartaric acid
• the fixing bath subsquent to the bleaching bath or a processing bath having bleach-fixing performance can be incorporated with those compounds known as fixing agents such as thiosulfate, (for example, sodium thiosulfate, ammonium thiosulfate, ammonium sodium thiosulfate and potassium thiosulfate), thiocyanate (such as ammonium thiocyanate and potassium thiocyanate), thiourea and thioether.
• the addition amount of these fixing agents is preferably less than 3 mol and, particularly preferably less than 2 mol per one liter of the processing solution having the fixing performance or the processing solution having the bleach-fixing performance.
• the processing solution having the bleach-fixing performance in the present invention can be incorporated with so-called sulfite ion releasing compounds such as sulfite, (for example, sodium sulfite and ammonium sulfite), hydrogensulfite or aldehyde and hypersulfite addition product (for example, carbonyl-bisulfite).
• sulfite for example, sodium sulfite and ammonium sulfite
• hydrogensulfite or aldehyde for example, carbonyl-bisulfite
• aminopoly­carboxylic acid salts as shown from (1) to (19), or organic phosphonic acid compounds such as ethylene­diamine tetrakismethylenephosphonic acid, diethylene­triamine pentakismethylenephosphonic acid, 1,3-diamino­propane tetrakis methylenephosphonic acid, nitrilo-­N,N,N-trimethylenephosphonic acid, 1-hydroxyethylidene-­1,1′-diphosphonic acid, etc.
• organic phosphonic acid compounds such as ethylene­diamine tetrakismethylenephosphonic acid, diethylene­triamine pentakismethylenephosphonic acid, 1,3-diamino­propane tetrakis methylenephosphonic acid, nitrilo-­N,N,N-trimethylenephosphonic acid, 1-hydroxyethylidene-­1,1′-diphosphonic acid, etc.
• At least one bleaching accelerator selected from compounds having mercapto group or disulfide bond, isothiourea derivatives and thiazolidine derivatives may be incorporated in the processing solution having the bleaching function for conducting the processing.
• the amount of such compounds per one liter of the processing solution having the bleach fixing performance is preferably from 1 ⁇ 10 ⁇ 5 to 1 ⁇ 10 ⁇ 1 mol and, more preferably, from 1 ⁇ 10 ⁇ 4 to 5 ⁇ 10 ⁇ 2.
• the bleaching accelerator incorporated in the processing solution having the bleaching performance in the present invention is selected from the compounds having mercapto group or disulfide bond, thiazolidine derivative, thiourea derivative and isothio derivatives, so long as they are effective in bleaching acceleration. Those compounds and specific examples are preferably described in the specification of JP-A-63-163853.
• the compound For adding the compound into the processing solution, it is generally preferred to previously dissolve in water, alkaline organic acid organic solvent, etc. If the compound is added in the form of powder as it is directly to the processing bath having the bleaching function, this causes no undesired effect at all for the bleaching acceleration.
• the bleaching accelerator can be incorporated into the photosensitive material in the present invention.
• the bleaching accelerator can be incorporated into any one of the blue-sensitive, green-sensitive and red-sensitive emulsion layers, or a gelatin layer at the uppermost, intermediate or the lowermost layer.
• the processing bath having the bleach-fixing performance according to the present invention may be a step including one vessel.
• it may be constituted as a step including two or more vessels in which replenishing solution is supplied to the group of vessels in a multi-stage countercurrent system.
• the processing solutions in the group of the vessels may be circulated to form a uniform processing solution as the whole and the replenishing solution may be supplied to one of the vessels of the group.
• the silver halide color photosensitive material according to the present invention is usually applied with desilvering processing such as fixing or bleach-­fixing and, thereafter, subjected to a water washing and/or stabilizing step.
• the amount of the washing water in the water washing step can be set within a wide range depending on the characteristics of the photosensitive material, for example, material used such as coupler, application use and, further, temperature of the washing water, number of the water washing vessels (number of steps), replenishing system such as countercurrent or normal current type etc, as well as like other various conditions.
• the relationship between the number of water washing vessels and the amount of water in the multi-stage countercurrent system can be determined by the method as described in "Journal of the Society of Motion Picture and Television Engineers", Vol. 64, pages 248 to 253 (May, 1955).
• pH value for the washing water in the processing of the photosensitive material according to the present invention is from 4 to 9, preferably, 5 to 8.
• the temperature and the time for water washing can also be set variously depending on the characteristics and the application uses of the photosensitive material and it is generally selected within a range from 20 sec to 10 min at 15 to 45°C, preferably, from 30 sec to 5 min at 25 to 40°C.
• the photosensitive material accord­ing to the invention can be processed directly with a stabilizing solution instead of water washing.
• a stabilizing processing all of known methods can be used as described in JP-A-57-8543, JP-A-58-14834, JP-A-­59-184343, JP-A-60-220345, JP-A-60-238832, JP-A-60-­239784, JP-A-60-239749, JP-A-61-4054, JP-A-61-118749, etc.
• stabilizing baths containing 1-­hydroxyethylidene-1,1-diphosphonic acid, 5-chloro-2-­methyl-4-isothiazolin-3-one, bismuth compound, ammonium compound, etc. can preferably be used.
• a stabilizing bath containing formalin and surface active agent used as the final bath for the camera film type color photosensitive material can be mentioned as an Example.
• Specimen 101 which is a multi-­layered color photosensitive material comprising each of the layers of the composition shown below was prepared. (Composition of the photosensitive layer)
• the coating amount was shown, for the silver-­halide and colloidal silver by the amount of silver represented by g/m2 unit, for the coupler, additive and gelatin, by the amount represented by g/m2 unit and, for the sensitizing dye, by the mol number per one mol of silver halide in one identical layer.
• Silver iodobromide emulsion (AgI 5 mol%, internal high AgI type, diameter as sphere 0.7 ⁇ , variation coefficient for the spherical diameter 25%, regular twine crystal mixed grain, diameter/thickness ratio 4) 0.7 amount of silver coating Gelatin 0.5 ExS-1 1.0 ⁇ 10 ⁇ 4 ExS-2 3.0 ⁇ 10 ⁇ 4 ExS-3 1.0 ⁇ 10 ⁇ 5 ExC-3 0.24 ExC-4 0.24 ExC-7 0.04 ExC-2 0.04 Solv-1 0.15 Solv-3 0.02
• Silver iodobromide emulsion (AgI 10 mol%, internal high AgI type, diameter as sphere 0.8 ⁇ , variation coefficient for the spherical diameter 16%, regular twine crystal mixed grain, diameter/thickness ratio 1.3) 1.0 amount of silver coating Gelatin 1.0 ExS-1 1.0 ⁇ 10 ⁇ 4 ExS-2 3.0 ⁇ 10 ⁇ 4 ExS-3 1.0 ⁇ 10 ⁇ 5 ExC-6 0.13 Solv-1 0.01 Solv-3 0.05
• Silver iodobromide emulsion (AgI 2 mol%, internal high AgI type, diameter as sphere 0.3 ⁇ , variation coefficient for the spherical diameter 28%, regular twine crystal mixed grain, diameter/thickness ratio 2.5) 0.30 amount of silver coating ExS-4 5.0 ⁇ 10 ⁇ 4 ExS-6 0.3 ⁇ 10 ⁇ 4 ExS-5 2.0 ⁇ 10 ⁇ 4 Gelatin 1.0 ExM-9 0.2 ExY-14 0.03 ExM-8 0.03 Solv-1 0.5
• Silver iodobromide emulsion (AgI 4 mol%, internal high AgI type, diameter as sphere 0.6 ⁇ , variation coefficient for the spherical diameter 38%, regular twine crystal mixed grain, diameter/thickness ratio 4) 0.4 amount of silver coating Gelatin 0.5 ExS-4 5.0 ⁇ 10 ⁇ 4 ExS-5 2.0 ⁇ 10 ⁇ 4 ExS-6 0.3 ⁇ 10 ⁇ 4 ExM-9 0.25 ExM-8 0.03 ExM-10 0.015 ExY-14 0.01 Solv-1 0.2
• Silver iodobromide emulsion (AgI 6 mol%, internal high AgI type, diameter as sphere 1.0 ⁇ , variation coefficient for the spherical diameter 80%, regular twine crystal mixed grain, diameter/thickness ratio 1.2) 0.85 amount of silver coating Gelatin 1.0 ExS-7 3.5 ⁇ 10 ⁇ 4 ExS-8 1.4 ⁇ 10 ⁇ 4 ExM-11 0.1 ExM-12 0.03 ExM-13 0.20 ExM-8 0.02 ExY-14 0.02 Solv-1 0.20 Solv-2 0.05
• Silver iodobromide emulsion (AgI 4 mol%, internal high AgI type, diameter as sphere 0.5 ⁇ , variation coefficient for the spherical diameter 15%, octahedron grain) 0.40 amount of silver coating Gelatin 1.0 ExS-9 2 ⁇ 10 ⁇ 4 ExY-16 0.9 ExY-14 0.07 Solv-1 0.20
• Silver iodobromide emulsion (AgI 10 mol%, internal high AgI type, diameter as sphere 1.3 ⁇ , variation coefficient for the spherical diameter 25%, regular twine crystal mixed grain, diameter/thickness ratio 4.5) 0.50 amount of silver coating Gelatin 0.6 ExS-9 1 ⁇ 10 ⁇ 4 ExY-16 0.25 Solv-1 0.07
• Silver bromide fine grains (average grain size 0.07 ⁇ ) 0.5 Gelatin 0.45 Polymethylmethacrylate (diameter1.5 ⁇ ) 0.2 H-1 0.4 Cpd-3 0.5 Cpd-4 0.5
• Specimen 101 The specimen prepared as described above is referred to as Specimen 101.
• Specimens 102 to 110 were prepared in the same manner as in Specimen 101 by using comparative compounds A, B and C, the compound of the present invention each in an equal molar amount instead of the coupler EXC-6 added to the fifth layer in Specimen 101.
• specimens passed through the processing (III) were stored under 80°C, 70% HR atmosphere for 30 days in a dark place to examine the color image fastness.
• the stabilization steps (1), (2) and (3) were conducted as the countercurrent system of (3) ⁇ (2) ⁇ (1).
• the amount of the fixing solution carried to the water washing vessel was 2 ml per 1 m.
• the tap water was processed by using a strongly acidic cationic exchange resin (Na type) manufactured by Mitsubishi Chemical Industries Ltd. to adjust the water quality as described below.
• a strongly acidic cationic exchange resin Na type manufactured by Mitsubishi Chemical Industries Ltd. to adjust the water quality as described below.
• Disodium ethylenediamine tetraacetate was added by 500 mg/liter to the tap water described above. pH 6.8
• Specimens 101 to 110 were processed in the same manner as in the processing step (III) except for changing the replenishing amount in the water washing step from 10 ml to 125 ml (referred to as Processing step (IV)).
• the coupler of the present invention when used shows remarkable effect in the reduction of the residual silver amount and the fastness of cyan color image, with no side effect such as increase in Dmin and has sufficient sensitivity as well.
• Example 2 The same running processing was carried out as in Example 1 while changing the pH value of the bleach-fixing bath used in the processing step (III) to 6.0, 5.7, 5.5. Then, residual silver amount and the density of the cyan dye image were measured through Specimens 101 to 110 subjected to wedge exposure.
• the use of the coupler according to the present invention can provide a sufficient cyan concentration even passed through a bleach-fixing bath at low pH effective to the improvement of the desilvering rate, and it can satisfy both the improvement in the desilvering property when using bleach-fixing bath at low pH and the stability of the cyan dye image (resistivity to the reduction in color restoreability).
• Specimen 201 that is, a multi-­layered color photosensitive material comprising each of the layers of the composition shown below was prepared. (Composition of the photosensitive layer)
• the coating amount was shown, for the silver-­halide and colloidal silver, by the amount of silver represented by g/m2 unit, for the coupler, additive and gelatin by the amount represented by g/m2 unit and, for the sensitizing dye, by the mol number per one mol of silver halide in one identical layer.
• Silver iodobromide emulsion (AgI 4 mol%, uniform AgI type, diameter as sphere 0.5 ⁇ , variation coefficient for the spherical diameter 20%, tabular grain, diameter/thickness ratio 3.0) 1.2 amount of silver coating Silver iodobromide emulsion (AgI 3 mol%, uniform AgI type, diameter as sphere 0.3 ⁇ , variation coefficient for the spherical diameter 15%, spherical grain, diameter/thickness ratio 1.0) 0.6 amount of silver coating Gelatin 1.0 ExS-1 4.0 ⁇ 10 ⁇ 4 ExS-2 5.0 ⁇ 10 ⁇ 4 ExC-1 0.05 ExC-2 0.50 ExC-3 0.03 ExC-4 0.12 ExC-5 0.01
• Silver iodobromide emulsion (AgI 6 mol%, internal high AgI type, with core/shell ratio 1:1, diameter as sphere 0.7 ⁇ , variation coefficient for the spherical diameter 15%, tabular grain, diameter/thickness ratio 4) 0.7 amount of silver coating Gelatin 1.0 ExS-1 3.0 ⁇ 10 ⁇ 4 ExS-2 2.3 ⁇ 10 ⁇ 5 ExC-6 0.11 ExC-7 0.05 ExC-4 0.05 Solv-1 0.05 Solv-2 0.05
• Silver iodobromide emulsion (AgI 4 mol%, surface high AgI type with core/shell ratio 1:1, diameter as sphere 0.5 ⁇ , variation coefficient for the spherical diameter 15%, tabular grains, diameter/thickness ratio 4.0) 0.35 amount of silver coating
• Silver iodobromide emulsion (AgI 3 mol%, uniform AgI type, diameter as sphere 0.3 ⁇ , variation coefficient for the spherical diameter 25%, spherical grain, diameter/thickness ratio 1.0) 0.20 amount of silver coating
• Silver iodobromide emulsion (AgI 4 mol%, internal high AgI type with core/shell ratio 1:3, diameter as sphere 0.7 ⁇ , variation coefficient for the spherical diameter 20%, tabular grains, diameter/thickness ratio 5.0) 0.8 amount of silver coating Gelatin 0.5 ExS-3 5.0 ⁇ 10 ⁇ 4 ExS-4 3.0 ⁇ 10 ⁇ 4 ExS-5 1.0 ⁇ 10 ⁇ 4 ExM-8 0.16 ExM-9 0.02 ExY-11 0.03 ExC-2 0.03 ExM-14 0.01 Solv-1 0.2 Solv-4 0.01
• Silver iodobromide emulsion (AgI 2 mol%, internal high AgI type, with core/shell ratio 2:1, diameter as sphere 1.0 ⁇ , variation coefficient for the spherical diameter 15%, tabular grain, diameter/thickness ratio 6.0) 0.35 amount of silver coating Silver iodobromide emulsion (AgI 2 mol%, internal high AgI type of core/shell ratio 1:1, diameter as sphere 0.4 ⁇ , variation coefficient for the spherical diameter 20%, tabular grain, diameter/thickness ratio 6.0) 0.20 amount of silver coating Gelatin 0.5 ExS-3 8 ⁇ 10 ⁇ 4 ExY-13 0.11 ExM-12 0.03 ExM-14 0.10 Solv-1 0.20
• Silver iodobromide emulsion (AgI 4.5 mol%, uniform AgI type, diameter as sphere 0.7 ⁇ , variation coefficient for the spherical diameter 15%, tabular grains, diameter/thickness ratio 7.0) 0.3 amount of silver coating Silver iodobromide emulsion (AgI 3 mol%, uniform AgI type, diameter as sphere 0.3 ⁇ , variation coefficent for the spherical diameter 25%, tabular grains, diameter/thickness ratio 7.0) 0.15 amount of silver coating Gelatin 1.6 ExS-6 2 ⁇ 10 ⁇ 4 ExC-16 0.05 ExC-2 0.10 ExC-3 0.02 ExY-13 0.07 ExY-15 1.0 Solv-1 0.20
• Silver iodobromide emulsion (AgI 10 mol%, internal high AgI type, diameter as sphere 1.0 ⁇ , variation coefficient for the spherical diameter 25%, multiple twine tabular grains, diameter/thickness ratio 2.0) 0.5 amount of silver coating Gelatin 0.5 ExS-6 1 ⁇ 10 ⁇ 4 ExY-15 0.20 ExY-13 0.01 Solv-1 0.10
• Fine grain of silver bromide emulsion (AgI 2 mol%, uniform AgI type, diameter as spheres 0.07 ⁇ ) 0.5 Gelatin 0.45 Polymethylmethacrylate (diameter 1.5 ⁇ ) 0.2 H-1 0.4 Cpd-3 0.5 Cpd-4 0.5
• stabilizer Cpd-3 for the emulsion (0.04 g/m2) and surface active agent Cpd-4 (0.01 g/m2) were added as the coating aid to each of the layers.
• Solv-1 tricresyl phosphate Solv-2 dibutyl phthalate
• Specimens 202 to 210 were prepared by replacing the coupler EXC-6 added to the fourth layer in Specimen 201 with the comparative coupler and the coupler of the present invention used in Example 1.

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