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
• • 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
  • G03C2200/00—Details
  • G03C2200/35—Intermediate layer
• • 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
  • G03C7/3029—Materials characterised by a specific arrangement of layers, e.g. unit layers, or layers having a specific function
• • 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

Definitions

• the invention relates to a color photographic recording material with improved color separation, improved darkness and light stability after exposure and processing.
• the oxidation product of the developer (EOP) is formed in the exposed areas, which couples in the same layer with the coupler present there to form the desired dye (usually yellow, purple or cyan, depending on the layer).
• the EOP also tends to diffuse into the neighboring layers, which leads to color distortions if it encounters other color couplers there.
• intermediate layers of gelatin are cast between the light-sensitive, coupler-containing silver halide gelatin layers of different spectral sensitization.
• the effect of the intermediate layers is usually increased by the addition of so-called EOP scavengers or scavengers, which are compounds which reduce the EOP and are themselves oxidized.
• EOP scavengers or scavengers are compounds which reduce the EOP and are themselves oxidized.
• dialkyl substituted hydroquinones e.g. 2,5-dioctylhydroquinone, the alkyl residues of which are intended to prevent diffusion into other layers of the material and the OH groups of which are oxidized by the EOP, while the developer substance is again formed from the EOP, which is leached out with the other developer in the course of the processing process.
• EOP catcher that can be used is limited, since otherwise considerably thicker intermediate layers would have to be cast, which has an adverse effect on the mechanical properties of the layer, an adverse effect on the development kinetics of the lowest color layer and, because of the increased light scattering, also on the sharpness of the material.
• the object of the invention was therefore to provide a color photographic material which has a better color separation without loss of sharpness or other required photographic properties.
• This object is achieved according to the invention in that a combination of EOP scavenger in certain amounts and white coupler in certain amounts is used in the intermediate layer between a red- and the green-sensitive light-sensitive silver halide emulsion layer.
• White couplers are understood to mean those compounds which react with the EOP in the sense of an addition reaction to form a product which does not absorb in the visible region of the spectrum and is therefore colorless.
• the combination according to the invention when using the combination according to the invention, very small amounts of the two combination partners can be used, as a result of which the layer thickness of the intermediate layer can be reduced by saving gelatin.
• the EOP catcher used alone would have to be used in much larger amounts in order to achieve a comparable color separation .
• the combination according to the invention achieves surprising advantages in terms of dark and light stability after exposure and processing. EOP catchers and white couplers alone do not show these advantages.
• the invention therefore relates to a color photographic silver halide material which has on a support at least one blue-sensitive silver halide emulsion layer containing at least one yellow coupler, at least one green-sensitive silver halide emulsion layer containing at least one magenta coupler and at least one red-sensitive silver halide emulsion layer containing at least one cyan coupler and non-light-sensitive intermediate layers Contains silver halide emulsion layers of different spectral sensitization, characterized in that the intermediate layer located between a red-sensitive and a green-sensitive silver halide emulsion layer contains at least one EOP scavenger in a total EOP scavenger amount of 0.06 to 0.6 mmol / m 2 and at least one white coupler contains in a total amount of white coupler from 0.01 to 0.8 mmol / m 2 .
• EOP catchers Mixtures of 2 or more EOP catchers that together meet the required quantity relationship are also to be understood as EOP catchers in the stated amount. The same applies to white couplers.
• the polymer additionally contains a polymerized ethylenically unsaturated compound M.
• each in% by weight are contained:
• the polymers according to the invention preferably have a glass transition temperature of less than 20 ° C.
• the glass transition temperature is determined by the methods known from differential thermal analysis and differential calorimetry, which are described, for example, in the book "Polymeranalytik II” by Hoffmann, Krämer and Kuhn, Thieme Verlag, Stuttgart 1977.
• the use of the polymers in photographic materials also surprisingly results improves the mechanical properties, especially the breaking strength.
• R 4 , Rs, R 6 and R 7 independently of one another are hydrogen, halogen, optionally substituted alkyl, optionally substituted alkenyl, optionally substituted aryl, optionally substituted cycloalkyl, optionally substituted alkoxy, optionally substituted alkylthio, optionally substituted arylthio, optionally substituted heterocyclylthio, optionally substituted Aryloxy, optionally substituted acyl, optionally substituted acylamino, optionally substituted alkoxycarbonyl, optionally substituted aryloxycarbonyl, alkyl or arylcarbamoyl, alkylsulfamoyl, sulfo or carboxy.
• Alkyl and R 6 is hydrogen, C 1 -C 20 alkyl or C 1 -
• R 5 and R 7 are hydrogen
• R 4 is C, -C 2 -alkyl or C 1 -C 8 alkoxycarbonyl-C 1 -C 8 -C 8 alkoxycarbonyl-C 1 -C 8 alkyl.
• Suitable compounds are: where tC 8 H 17 and tC 6 H 13 are the formulas to have.
• the material can also contain a substrate layer, further intermediate layers, one or more yellow filter layers and one or more protective or cover layers.
• the intermediate layer between a blue-sensitive and a green-sensitive silver halide emulsion layer preferably also contains 0.1 to 0.8 mmol / m 2 EOP scavenger and 0.01 to 0.08 mmol / m 2 white coupler.
• the support is usually followed in the order given by the red-sensitive layer or 2 or 3 red-sensitive layers, the green-sensitive layer or 2 or 3 green-sensitive layers, a yellow filter layer and the blue-sensitive layer or 2 or 3 blue-sensitive layers.
• Other layers are also possible, in particular in the case of multilayer materials, layers of the same sensitization do not necessarily have to be adjacent, but can also be arranged in the alternating order specified in DE-A 2 530 645.
• the blue-sensitive, the green-sensitive and the red-sensitive silver halide emulsion layer are usually arranged on the support in the order given. There is no yellow filter layer.
• AgBr, AgBrCI, AgBrl, AgBrCII and AgCI are suitable as silver halides of the silver halide emulsion layers.
• the intermediate layer containing the combination according to the invention can further contain a blue or green-sensitized silver halide emulsion, the sensitivity of which is lower than that of the green-sensitive silver halide emulsion layer containing the coupler, which improves the tracing of red tones of high density.
• the intermediate layer between the green-sensitive silver halide emulsion layer containing a magenta coupler and the red-sensitive silver halide emulsion layer containing a cyan coupler contains a red- or red- and green-sensitized silver halide emulsion.
• the intermediate layer between the green-sensitive silver halide emulsion layer containing a magenta coupler and the blue-sensitive silver halide emulsion layer containing a yellow coupler can contain a green sensitive silver halide emulsion.
• the sensitivity of the emulsions of the intermediate layers is lower than the sensitivity of the emulsion of the coupler-containing layers.
• the silver halides of all light-sensitive layers preferably contain at least 80 mol% of chloride, in particular 95 to 100 mol% of chloride, 0 to 5 mol% of bromide and 0 to 1 mol% of iodide.
• the silver halide emulsions can be directly positive-working or preferably negative-working emulsions.
• the silver halide can be predominantly compact crystals, e.g. are regular cubic or octahedral or can have transitional forms.
• twins e.g. B. are platelet-shaped crystals, the average ratio of diameter to thickness is preferably at least 5: 1, wherein the diameter of a grain is defined as the diameter of a circle with a circle content corresponding to the projected area of the grain.
• the layers can also have tabular silver halide crystals in which the ratio of diameter to thickness is greater than 5: 1, e.g. 12: 1 to 30: 1.
• the silver halide grains can also have a multi-layered grain structure, in the simplest case with an inner and an outer grain area (core / shell), the halide composition and / or other modifications, such as e.g. Doping of the individual grain areas are different.
• the average grain size of the emulsions is preferably between 0.2 .mu.m and 2.0 .mu.m, the grain size distribution can be either homodisperse or heterodisperse.
• the emulsions can also contain organic silver salts, e.g. Silver benzotriazolate or silver behenate.
• the photographic emulsions can be prepared using various methods (e.g. P. Glafkides, Chimie et Physique Photographique, Paul Montel, Paris (1967), GF Duffin, Photographic Emulsion Chemistry, The Focal Press, London (1966), VL Zelikman et al, Making and Coating Photographic Emulsion, The Focal Press, London (1966) from soluble silver salts and soluble halides.
• various methods e.g. P. Glafkides, Chimie et Physique Photographique, Paul Montel, Paris (1967), GF Duffin, Photographic Emulsion Chemistry, The Focal Press, London (1966), VL Zelikman et al, Making and Coating Photographic Emulsion, The Focal Press, London (1966) from soluble silver salts and soluble halides.
• the silver halide is preferably precipitated in the presence of the binder, e.g. the gelatin and can be carried out in the acidic, neutral or alkaline pH range, silver halide complexing agents preferably being additionally used.
• the latter include e.g. Ammonia, thioether, imidazole, ammonium thiocyanate or excess halide.
• the water-soluble silver salts and the halides are combined either in succession by the single-jet process or simultaneously by the double-jet process or by any combination of the two processes. Dosing with increasing inflow rates is preferred, the "critical" feed rate, at which no new germs are being produced, should not be exceeded.
• the pAg range can vary within wide limits during the precipitation, preferably the so-called pAg-controlled method is used, in which a certain pAg value is kept constant or a defined pAg profile is traversed during the precipitation.
• so-called inverse precipitation with an excess of silver ions is also possible.
• the silver halide crystals can also grow through physical ripening (Ostwald ripening), in the presence of excess halide and / or silver halide complexing agent.
• the growth of the emulsion grains can even take place predominantly by Ostwald ripening, preferably a fine-grained, so-called Lippmann emulsion, mixed with a less soluble emulsion and redissolved on the latter.
• the silver halide grains can be precipitated in the presence of "growth modifiers", which are substances which influence growth in such a way that special grain shapes and grain surfaces (for example 111 surfaces with AgCl) are formed.
• growth modifiers are substances which influence growth in such a way that special grain shapes and grain surfaces (for example 111 surfaces with AgCl) are formed.
• the precipitation can also be carried out in the presence of sensitizing dyes.
• Complexing agents and / or dyes can be rendered ineffective at any time, e.g. by changing the pH or by an oxidative treatment.
• Cellulose derivatives such as hydroxyalkyl cellulose, carboxymethyl cellulose and phthalyl cellulose as well as gelatin derivatives which have been obtained by reaction with alkylating or acylating agents or by grafting on polymerizable monomers are examples of this.
• the binders should have a sufficient amount of functional groups so that enough resistant layers can be produced by reaction with suitable hardening agents.
• functional groups are in particular amino groups, but also carboxyl groups, hydroxyl groups and active methylene groups.
• the gelatin which is preferably used can be obtained by acidic or alkaline digestion.
• the production of such gelatins is described, for example, in The Science and Technology of Gelatine, published by A.G. Ward and A. Courts, Academic Press 1977, page 295 ff.
• the gelatin used in each case should contain the lowest possible level of photographically active impurities (inert gelatin). High viscosity, low swelling gelatins are particularly advantageous.
• the gelatin can be partially or completely oxidized.
• the soluble salts are removed from the emulsion, e.g. by pasta and washing, by flakes and washing, by ultrafiltration or by ion exchanger.
• the photographic emulsions may contain compounds to prevent fogging or to stabilize the photographic function during production, storage or photographic processing.
• Azaindenes are particularly suitable, preferably tetra- and penta-azaindenes, in particular those which are substituted by hydroxyl or amino groups.
• Such connections are e.g. B. von Birr, Z. Wiss. Phot. 47 (1952), pp. 2-58.
• Salts of metals such as mercury or cadmium, aromatic sulfonic or sulfinic acids such as benzenesulfinic acid, or nitrogen-containing heterocycles such as nitrobenzimidazole, nitroindazole, (subst.) Benzotriazoles or benzothiazolium salts can also be used as antifoggants be set.
• Heterocycles containing mercapto groups e.g.
• B mercaptobenzthiazoles, mercaptobenzimidazoles, mercaptotetrazoles, mercaptothiadiazoles, mercaptopyrimidines, which mercaptoazoles can also contain a water-solubilizing group, for example a carboxyl group or sulfo group. Further suitable compounds are published in Research Disclosure No. 17643 (1978), section VI.
• the stabilizers can be added to the silver halide emulsions before, during or after their ripening.
• the compounds can also be added to other photographic layers which are assigned to a halogen silver layer.
• the silver halide emulsions are usually chemically ripened, for example by the action of gold compounds or compounds of divalent sulfur.
• the photographic emulsion layers or other hydrophilic colloid layers of the light-sensitive material produced according to the invention can contain surface-active agents for various purposes, such as coating aids, to prevent electrical charging, to improve the sliding properties, to emulsify the dispersion, to prevent adhesion and to improve the photographic characteristics (eg acceleration of development, high contrast, sensitization etc.).
• Sensitizers can be dispensed with if the intrinsic sensitivity of the silver halide is sufficient for a certain spectral range, for example the blue sensitivity of silver bromide iodides.
• the differently sensitized emulsion layers are assigned non-diffusing monomeric or polymeric color couplers, which can be located in the same layer or in a layer adjacent to it.
• Color couplers for generating the blue-green partial color image are usually couplers of the phenol or a-naphthol type.
• Color couplers for producing the purple partial color image are generally couplers of the 5-pyrazolone, indazolone or pyrazoloazole type.
• Color couplers for producing the yellow partial color image are generally couplers with an open-chain ketomethylene group, in particular couplers of the a-acylacetamide type; Suitable examples are a-benzoylacetanilide couplers and a-pivaloylacetanilide couplers.
• the color couplers can be 4-equivalent couplers, but also 2-equivalent couplers.
• the latter are derived from the 4-equivalent couplers in that they contain a substituent in the coupling site which is split off during the coupling.
• the couplers usually contain a ballast residue to prevent diffusion within the material, i.e. both within a layer or from layer to layer, to make it impossible.
• a ballast residue instead of couplers with a ballast residue, high-molecular couplers can also be used.
• High molecular weight color couplers are described, for example, in DE-C-1 297 417, DE-A-24 07 569, DE-A-31 48 125, DE-A-32 17 200, DE-A-33 20 079, DE-A-33 24 932, DE-A-33 31 743, DE-A-33 40 376, EP-A-27 284, US-A-4 080 211.
• the high molecular weight color couplers are usually produced by polymerizing ethylenically unsaturated monomeric color couplers. However, they can also be obtained by polyaddition or polycondensation.
• the couplers or other compounds can be incorporated into silver halide emulsion layers by first preparing a solution, a dispersion or an emulsion of the compound in question and then adding it to the casting solution for the layer in question.
• the selection of the suitable solvent or dispersion medium depends on the solubility of the compound.
• Hydrophobic compounds can also be introduced into the casting solution using high-boiling solvents, so-called oil formers. Corresponding methods are described for example in US-A-2 322 027, US-A-2 801 170, US-A-2 801 171 and EP-A-0 043 037.
• oligomers or polymers instead of the high-boiling solvents, oligomers or polymers, so-called polymeric oil formers, can be used.
• the compounds can also be introduced into the casting solution in the form of loaded latices.
• anionic water-soluble compounds e.g. dyes
• pickling polymers e.g. acrylic acid
• Suitable oil formers are e.g. Alkyl phthalates, phosphonic acid esters, phosphoric acid esters, citric acid esters, benzoic acid esters, amides, fatty acid esters, trimesic acid esters, alcohols, phenols, aniline derivatives and hydrocarbons.
• suitable oil formers are dibutylphthalate, dicyclohexylphthalate, di-2-ethylhexylphthalate, decylphthalate, triphenylphosphate, tricresylphosphate, 2-ethylhexyldiphenylphosphate, tricyclohexylphosphate, tri-2-ethylhexylphosphate, tridecylphethylphosphate, trilecoxyphosphate, tri-ethyloxyphosphate, tri-ethyloxyphosphate, tri-ethyloxyphosphate, tri-ethyloxyphosphate, tri-ethyloxyphosphate, tri-ethyloxyphosphate, tri-ethyloxyphosphate, tri-ethyloxyphosphate, tri-ethyloxyphosphate, tri-ethyloxyphosphate, tri-ethyloxyphosphate, tri-ethyloxyphosphate, tri-ethyloxyphosphate, tri-oxy-
• the photographic material can also contain UV light-absorbing compounds, whiteners, spacers, filter dyes, formalin scavengers, light stabilizers, antioxidants, D min dyes, additives to improve dye, coupler and white stabilization and to reduce the color fog, plasticizers (latices), Contain biocides and others.
• Examples are aryl-substituted benzotriazole compounds (US-A-3 533 794), 4-thiazolidone compounds (US-A-3 314 794 and 3 352 681), benzophenone compounds (JP-A-2784/71), cinnamic acid ester compounds (US-A-3 705 805 and 3,707,375), butadiene compounds (US-A-4,045,229) or benzoxazole compounds (US-A-3,700,455).
• Ultraviolet absorbing couplers such as a-naphthol type cyan couplers
• ultraviolet absorbing polymers can also be used. These ultraviolet absorbents can be fixed in a special layer by pickling.
• Filter dyes suitable for visible light include oxonol dyes, hemioxonol dyes, styryl dyes, merocyanine dyes, cyanine dyes and azo dyes. Of these dyes, oxonol dyes, hemioxonol dyes and merocyanine dyes are used particularly advantageously.
• Suitable white toners are e.g. in Research Disclosure 17,643 (Dec. 1978), Chapter V, in US-A-2,632,701, 3,269,840 and in GB-A-852,075 and 1,319,763.
• binder layers in particular the most distant layer from the support, but also occasionally intermediate layers, especially if they are the most distant layer from the support during manufacture, may contain photographically inert particles of inorganic or organic nature, e.g. as a matting agent or as a spacer (DE-A-33 31 542, DE-A-34 24 893, Research Disclosure 17 643, (Dec. 1978), Chapter XVI).
• photographically inert particles of inorganic or organic nature e.g. as a matting agent or as a spacer (DE-A-33 31 542, DE-A-34 24 893, Research Disclosure 17 643, (Dec. 1978), Chapter XVI).
• the average particle diameter of the spacers is in particular in the range from 0.2 to 10 ⁇ m.
• the spacers are water-insoluble and can be alkali-insoluble or alkali-soluble, the alkali-soluble ones generally being removed from the photographic material in the alkaline development bath.
• suitable polymers are polymethyl methacrylate, copolymers of acrylic acid and methyl methacrylate and hydroxypropyl methyl cellulose hexahydrophthalate.
• Additives to improve dye, coupler and whiteness stability and to reduce the color haze can belong to the following chemical substance classes: hydroquinones, 6-hydroxychromanes, 5-hydroxycoumarans, spirochromans, spiroindanes, p- Alkoxyphenols, sterically hindered phenols, gallic acid derivatives, methylenedioxybenzenes, aminophenols, sterically hindered amines, derivatives with esterified or etherified phenolic hydroxyl groups, metal complex.
• the layers of the photographic material can be hardened with the usual hardening agents.
• Suitable curing agents are e.g. Formaldehyde, glutaraldehyde and similar aldehyde compounds, diacetyl, cyclopentadione and similar ketone compounds, bis (2-chloroethyl urea), 2-hydroxy-4,6-dichloro 1,3,5-triazine and other compounds containing reactive halogen (US-A- 3,288,775, US-A-2,732,303, GB-A-974,723 and GB-A-1,167,207) divinyl sulfone compounds, 5-acetyl-1,3-diacryloylhexahydro-1,3,5-triazine and other compounds, which contain a reactive olefin linkage (US-A-3 635 718, US-A-3 232 763 and GB-A-994 869); N-hydroxymethyl phthalomide and other N-methylol
• the hardening can be effected in a known manner by adding the hardening agent to the casting solution for the layer to be hardened or by overlaying the layer to be hardened with a layer which contains a diffusible hardening agent.
• Immediate hardeners are understood to mean compounds which crosslink suitable binders in such a way that the hardening is completed to such an extent immediately after casting, at the latest after 24 hours, preferably at the latest after 8 hours, that no further change in the sensitometry and the swelling of the layer structure occurs as a result of the crosslinking reaction .
• Swelling is understood to mean the difference between the wet film thickness and the dry film thickness during the aqueous processing of the film (Photogr. Sci., Eng. 8 (1964), 275; Photogr. Sci. Eng. (1972), 449).
• hardening agents that react very quickly with gelatin are e.g. to carbamoylpyridinium salts, which are able to react with free carboxyl groups of the gelatin, so that the latter react with free amino groups of the gelatin to form peptide bonds and crosslink the gelatin.
• the color photographic materials according to the invention are usually processed by developing, bleaching, fixing and washing or stabilizing without subsequent washing, whereby bleaching and fixing can be combined into one processing step.
• All developer compounds which have the ability to react in the form of their oxidation product with color couplers to form azomethine or indophenol dyes can be used as the color developer compound.
• Suitable color developer compounds are aromatic compounds of the p-phenylenediamine type containing at least one primary amino group, for example N, N-dialkyl-p-phenylenediamines such as N, N-diethyl-p-phenylenediamine, 1- (N-ethyl-N-methanesulfonamidoethyl) -3 -methyl-p-phenylenediamine, 1- (N-ethyl-N-hydroxyethyl) -3-methyl-p-phenylenediamine and 1- (N-ethyl-N-methoxyethyl) -3-methyl-p-phenylenediamine.
• Further useful color developers are described, for example, in J. Amer. Chem. Soc. 73, 3106 (1951) and G. Haist, Modern Photographic Processing, 1979, John Wiley and Sons, New York, page 545 ff.
• the material is usually bleached and fixed after color development.
• bleaching agents e.g. Fe (III) salts and Fe (III) complex salts such as ferricyanides, dichromates, water-soluble cobalt complexes can be used.
• Iron (III) complexes of aminopolycarboxylic acids are particularly preferred, especially e.g. of ethylenediaminetetraacetic acid, propylenediaminetetraacetic acid, diethylenetriaminepentaacetic acid, nitrilotriacetic acid, iminodiacetic acid, N-hydroxyethylethylenediaminetriacetic acid, alkyliminodicarboxylic acids and corresponding phosphonic acids.
• Persulphates and peroxides e.g. Hydrogen peroxide.
• the bleach-fixing bath or fixing bath is usually followed by washing, which is designed as countercurrent washing or consists of several tanks with their own water supply.
• the washing can be completely replaced by a stabilizing bath, which is usually carried out in countercurrent.
• this stabilizing bath also functions as a final bath.
• the color photographic material according to the invention can also be subjected to a reverse development.
• the color development is preceded by an initial development with a developer that does not form any dye with the couplers, and a diffuse second exposure or chemical fogging.
• the material according to the invention is preferably a material to be processed negatively.
• a color photographic recording material which is suitable for a rapid processing process was produced by applying the following layers in the order given to a paper coated on both sides with polyethylene.
• the quantities given relate to 1 m 2 .
• the corresponding amounts of AgN0 3 are given for the silver halide application.
• a color photographic recording material was produced which differs from Example 1 in that the amounts of dioctylhydroquinone were increased to 0.60 mmol in the 3rd layer and to 0.36 mmol in the 5th layer.
• the layer thickness of the 3rd layer increased by 10% compared to Example 1, that of the 5th layer by 4%.
• a color photographic recording material was prepared which differs from Example 1 in that the amount of dioctylhydroquinone was increased to 0.90 mmol in the 3rd layer and to 0.72 mmol in the 5th layer.
• the layer thickness of the 3rd layer increased by 20% compared to Example 1, that of the 5th layer by 12%.
• a color photographic recording material was produced which differs from Example 1 in that in the 3rd and 5th layers the 2,5-dioctylhydroquinone was replaced by 0.15 mmol W 1 in each case. There was no increase in layer thickness.
• a color photographic recording material was produced which differs from Example 1 in that only 0.12 mmol of 2,5-dioctylhydroquinone and additionally 0.08 mmol of W 1 in the 3rd and 5th layers and only 0 in the 5th layer , 08 mmol 2,5-dioctylhydroquinone and an additional 0.05 mmol W 1 were used. There was no increase in layer thickness.
• the samples according to the invention show a greater color purity than the comparison samples.
• the examples according to the invention show better dark stability than the comparative examples.

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• 1991
  • 1991-12-12 DE DE4140946A patent/DE4140946A1/de not_active Withdrawn
• 1992
  • 1992-11-30 DE DE59209236T patent/DE59209236D1/de not_active Expired - Fee Related
  • 1992-11-30 EP EP92120432A patent/EP0546416B1/fr not_active Expired - Lifetime
  • 1992-12-09 JP JP4351558A patent/JP2825720B2/ja not_active Expired - Lifetime

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