EP0014688A2 - Procédé de traitement de matériaux pour le blanchiment des couleurs à l'argent, préparation aqueuse à cet effet, concentrat et procédé de fabrication de la préparation - Google Patents

Procédé de traitement de matériaux pour le blanchiment des couleurs à l'argent, préparation aqueuse à cet effet, concentrat et procédé de fabrication de la préparation Download PDF

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Publication number
EP0014688A2
EP0014688A2 EP80810042A EP80810042A EP0014688A2 EP 0014688 A2 EP0014688 A2 EP 0014688A2 EP 80810042 A EP80810042 A EP 80810042A EP 80810042 A EP80810042 A EP 80810042A EP 0014688 A2 EP0014688 A2 EP 0014688A2
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EP
European Patent Office
Prior art keywords
quinoxaline
dimethyl
methoxy
bleaching
trimethyl
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP80810042A
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German (de)
English (en)
Other versions
EP0014688B1 (fr
EP0014688A3 (en
Inventor
Max Marthaler
Gérald Dr. Jan
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Cessione ilford AG
Original Assignee
Ciba Geigy AG
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Publication date
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Application filed by Ciba Geigy AG filed Critical Ciba Geigy AG
Priority to AT80810042T priority Critical patent/ATE2864T1/de
Publication of EP0014688A2 publication Critical patent/EP0014688A2/fr
Publication of EP0014688A3 publication Critical patent/EP0014688A3/de
Application granted granted Critical
Publication of EP0014688B1 publication Critical patent/EP0014688B1/fr
Expired legal-status Critical Current

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    • 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
    • G03C5/00—Photographic processes or agents therefor; Regeneration of such processing agents
    • G03C5/26—Processes using silver-salt-containing photosensitive materials or agents therefor
    • G03C5/40—Chemically transforming developed images
    • G03C5/44—Bleaching; Bleach-fixing
    • 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
    • G03C7/28—Silver dye bleach processes; Materials therefor; Preparing or processing such materials

Definitions

  • the latent silver image created during exposure is developed.
  • the image dye assigned to the silver is bleached out in accordance with the image-based distribution of the silver.
  • the third step is necessary to reoxidize the excess image silver that is still present after the color bleaching.
  • the silver, which is now entirely in the form of halides is removed by leaching out with a complexing agent, in particular a salt of thiosulfuric acid, in order to render the finished image insensitive to further exposure and to clear the pure color image of cloudiness.
  • the second process step takes place in the customary known processes in a strongly acidic medium, where a catalyst is added to accelerate color bleaching.
  • the bleaching baths also contain a silver complexing agent or ligand. Both components, catalyst and ligand, are necessary in order to transfer the reducing effect of the metallic, non-diffusible image silver to the likewise non-diffusible dye.
  • the reduced form of the catalyst resulting from reduction on the image silver serves as an intermediate support which, after covering a certain diffusion distance, irreversibly reduces the dye and thus bleaches, and is reoxidized itself to the original form.
  • the property of the reduced stage of the bleaching catalyst to freely diffuse between image silver and dye to be bleached makes it possible to spatially separate silver and image dye to a certain extent, i.e. That is, to arrange the bleachable dye and the silver halide emulsion assigned to it not or only partially in the same layer but in adjacent layers.
  • Such silver color bleaching materials are e.g. in German Offenlegungsschriften 2,036,918, 2,132,835 and 2,132,836.
  • Suitable bleaching catalysts which are reversibly reduced in the acidic solution under the influence of image silver and which in turn can reductively bleach the image dyes, are above all 1,4-diazines, such as pyrazine, quinoxaline, phenazine and their derivatives, furthermore 1,2-diazines, such as cinnoline and its derivatives such as benzo- or pyrido- [c] -cinnolines.
  • Suitable bleaching catalysts are listed in a large number of patents and applications, for example in DE-PS 735 672, DE-AS 1 547 720 and DE-OS 2 144 297, 2 144 298, 2 722 776 or 2 722 777 .
  • the silver color bleach positive images produced by the known method have been brought to perfection in recent years and are characterized in particular by brilliant colors, good color rendering and excellent light fastness.
  • An important characteristic of a good color copy material is an optimal tone reproduction and balanced color gradations in all density ranges. It is always difficult to control the color balance, since different bleaching behavior of the azo dyes cannot always be compensated for using conventional methods of material build-up, such as the sensitivity and contrast of the silver emulsions used. As a result, the selection of the image dyes, and in particular also that of the processing components in the bleaching bath, is restricted in many cases.
  • the object of the present invention is to eliminate the disturbed color balance as much as possible in order to achieve improved color rendering.
  • the redox potentials are measured in 1.0 molar aqueous sulfuric acid solution against the standard hydrogen electrode by a calomel electrode.
  • the quantitative ratio of the bleaching catalysts to one another can vary between 1: 200 and 200: 1.
  • the ranges of the redox potentials are preferably between +60 mV and -30mV (bleaching catalyst I) and -30 mV and - 100mV (bleaching catalyst II).
  • Suitable components (e) which have redox potentials within the stated limits are suitable as 1,2-diazines, optionally substituted benzo- or pyrido- [c] -cinnolines, and as 1,4-diazines, optionally substituted pyrazines and in particular quinoxalines.
  • the latter are preferably substituted, for example in positions 2, 3, 5, 6, 7 and / or 8, preferably in positions 2, 3, 6 and / or 7.
  • substituents are present in the molecule.
  • the quinoxalines can be substituted with methyl, methoxy, hydroxymethyl, sulfomethyl sulfoethoxy or sulfopropoxy, furthermore hydroxyl, amino (-NH 2 ), acetylamino or methylsulfonylamino, and optionally also with 5- or 6-membered rings, such as dioxolo, dioxino, Imidazo or pyrazino rings must be condensed.
  • Tables 1 and 2 below list suitable bleaching catalysts from groups I and II together with the associated redox potentials.
  • the present invention also provides the combination n wholesome dye and silver bleach baths (preparations) for the processing of the exposed silver dye bleach material which contain the components (a) to (e) and optionally (f).
  • the amount of bleaching catalysts used in the preferably aqueous treatment baths can vary within wide limits and is approximately 0.05 to 10 g / l of bleaching bath.
  • the temperature of the bleaching bath is generally between 20 and 90 ° C., preferably between 20 and 60 ° C., the processing time required, of course, being shorter at a higher temperature than at a lower temperature.
  • the bleaching baths are stable within the specified temperature range.
  • the aqueous bleaching preparations required for processing are used in the form of dilute aqueous solutions which contain the components mentioned.
  • other methods are also conceivable, e.g. application in paste form.
  • the aqueous bleaching preparation according to the present invention can e.g. be produced from liquid, in particular aqueous concentrates of individual or all components “a) to (f))).
  • aqueous concentrates of individual or all components “a) to (f))
  • one uses e.g. two liquid concentrates, one of which contains the strong acid (a) and the oxidizing agent (c) and the other of which contains the other components (b), (d), (e) and optionally (f), the latter to improve the solubility , in particular component (e), an additional solvent such as ethyl or propyl alcohol, ethylene glycol methyl or ethyl ether can be added.
  • These concentrates (partial concentrates), which are also the subject of the present invention, have excellent stability and can therefore be stored for a long time.
  • concentrates can optionally be diluted with water or diluted with a mixture of water and an organic solvent and used in the process according to the invention.
  • the concentrates of the individual or all components or their combinations e.g. from components (a) and (c) and from components (b), (d), (e) and (f) 2 to 20 times, preferably 5 to 10 times the amount of the individual components per Contains liters of concentrated preparation as previously stated for the ready-to-use bleach baths. They are usually in the form of liquid or paste-like, possibly also powder-form concentrates.
  • the strong dyestuffs (component (a)) in the combined dye and silver bleach baths may contain alkyl or arylsulfonic acids and in particular p-toluenesulfonic acid, sulfuric acid or sulfamic acid. If appropriate, mixtures of these acids can also be used.
  • the pH of the bleaching bath is in particular not greater than 2 and preferably not greater than 1.
  • the water-soluble iodides are generally alkali metal iodides, especially sodium and potassium iodide.
  • oxidizing agent (c) Water-soluble aromatic mononitro and dinitro compounds and anthraquinone sulfonic acid derivatives are expediently used as the oxidizing agent (c).
  • the use of such oxidizing agents serves to influence the color balance and the contrast of the images produced in the color bleaching process and is off the German patent specification 735 672, the British patent specifications 539 190 and 539 509 and the Japanese patent publication 22673/69.
  • the compounds of component (c) serve in addition to their function as silver bleaching agents for gradation flattening.
  • Reductones or water-soluble mercapto compounds are advantageously used as antioxidants (anticorrosive agents (d).
  • Suitable reductones are in particular aci-reductones with a 3-carbonylenediol (1,2) grouping, such as reductin, triose reductone or preferably ascorbic acid.
  • Examples of mercapto compounds are thioglycerin, but especially the compounds of the formula or preferably into consideration, where q is an integer from 2 to 12, B is a sulfonic acid or carboxylic acid group and m is one of the numbers 3 and 4.
  • Mercapto compounds which can be used as antioxidants are described in DE-OS 2 258 076 and DE-OS 2.423 814.
  • Suitable further antioxidants are alkali metal, alkaline earth metal or ammonium bisulfite adducts of organic carbonyl compounds, preferably alkali metal or ammonium bisulfite adducts of monoaldehydes with 1 to 4 or dialdehydes with 2 to 5 carbon atoms (DE-OS 2 737 142).
  • Examples include the particularly preferred formaldehyde bisulfite adduct, furthermore the corresponding adducts of acetaldehyde, propionaldehyde, butyraldehyde or isobutyraldehyde, of glyoxal, malondialdehyde or glutardialdehyde.
  • the tertiary water-soluble phosphines mentioned below as bleach accelerators can also be used simultaneously as antioxidants.
  • Further bleaching accelerators are the water-soluble tertiary phosphines known from DE-OS 2 651 969, which preferably contain at least one cyanoethyl group.
  • Preferred tertiary phosphines correspond to the formula wherein X 1 -CH 2 CH 2 CN or - (CH 2 ) 2 OCH 3 , Y 1 - (CH 2 ) 2 SO 3 ⁇ M ⁇ , - (CH 2 ) 3 -SO 3 ⁇ M ⁇ , - (CH 2 ) 4 -SO 3 ⁇ M ⁇ , - (CH 2 ) 2 OCH 3 or -CH 2 N (C 2 H 5 ) 2 , W 1 -CH 2 CH 2 CN or phenyl and M ⁇ a cation, in particular an alkali metal cation, for example that is sodium or potassium cation.
  • Baths of conventional composition can be used for silver development, e.g. those which contain hydroquinone as developer and optionally additionally 1-phenyl-3-pyrazolidinone.
  • the silver development bath may already contain a group I or II bleaching catalyst.
  • the silver fixing bath can be composed in a known and customary manner.
  • the fixative used is e.g. Sodium thiosulfate or advantageously ammonium thiosulfate, if desired with additives such as sodium bisulfite and / or sodium metabisulfite.
  • the method according to the invention can e.g. in the production of positive color images in copying or recording machines or in the rapid processing of other silver color bleaching materials such as for scientific records and industrial purposes, e.g. colored screen image photography can also be used for the production of color negatives and diffusion transfer images.
  • a transparent, metallic-reflecting, or preferably white-opaque material can be used as the carrier, which is unable to absorb any liquid from the baths.
  • the carrier can for example consist of optionally pigmented cellulose triacetate or polyester. If it is made of paper felt, it must be coated on both sides or coated with polyethylene.
  • the photosensitive layers are located on at least one side of this support, preferably in the known arrangement, i.e. at the bottom a red sensitized silver halide emulsion layer containing a blue-green azo dye, above it a green sensitized silver halide emulsion layer containing a purple azo dye and at the top a blue sensitive silver halide emulsion layer containing a yellow azo dye.
  • the material can also contain sub-layers, intermediate layers, filter layers and protective layers, but the total thickness of the layers should generally not exceed 20 ⁇ m.
  • the process according to the present invention has the advantage that the sensitometric curves of all three color layers of a silver color bleaching material can largely be covered by a suitable mixture of the catalysts to be selected from groups I and II, as a result of which, at all brightness levels, between the brightest lights and the darkest shadow areas neutral gray tones can be generated.
  • Another advantage is that the generally too steep color gradations that occur when using group I bleaching catalysts are significantly improved by admixing bleaching catalysts with an at least 15 mV lower redox potential from group I or preferably group II bleaching catalysts can be (balanced) without losing the advantage of rapid bleaching (reactive bleaching catalysts of group I) and thus the short treatment times.
  • the method according to the invention is also suitable for processing exposed silver color bleaching material which has a special structure and e.g. is suitable for producing self-masked images (DE-OS 2 547 720).
  • exposed silver color bleaching material which has a special structure and e.g. is suitable for producing self-masked images (DE-OS 2 547 720).
  • self-masked images DE-OS 2 547 720.
  • an even further improved color rendering can be achieved by the method according to the invention.
  • the silver development bath used to treat the material contains a ligand that is capable of producing water-soluble, diffusible silver complexes.
  • a photographic material for the silver color bleaching process is produced on a pigmented cellulose acetate support, using the blue-green image dye of the formula in the red-sensitized bottom layer, the purple dye of the formula in an overlying green-sensitized layer and the yellow dye of the formula in a blue-sensitive layer lying over the purple layer.
  • the photographic material used is structured as follows (see, for example, DE-OS 2 036 918 and 2 547 720).
  • the layer structure enables the correction of the blue secondary color densities of the cyan and magenta colors t offs by additional bleaching of the yellow image dye depending on the bleaching of the other two image dyes.
  • the iodide-containing emulsion layers contain crystals with 2.6 mol% silver iodide and 97.4 mol% silver bromide.
  • the image dyes are used in such a concentration that their reflectance density is 2.0; the total silver content of the 22 ⁇ m thick layers is 2.0 g / m 2 .
  • a colored slide is exposed on this material in an enlarger.
  • the exposed material is processed in a manual development drum at 24 ° C.
  • 100 ml processing solutions with the following compositions are used.
  • the positive top-view copy of the slide obtained after drying is characterized by unadulterated color rendering and flawless overall contrast.
  • the three color gradations are so balanced that neutral gray image areas in the slide are reproduced in all brightness levels without a color cast.
  • Example 1 The material used in Example 1 is exposed behind a gray wedge with additive color filters blue, green and red. In order to investigate the mode of action of the color bleaching catalysts, the exposed material is processed three times in accordance with Example 1;
  • the composition of the bleaching bath is varied as follows with regard to the amount of the two bleaching catalysts (compounds of the formulas (102) and (201)):

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Detergent Compositions (AREA)
  • Silver Salt Photography Or Processing Solution Therefor (AREA)
  • Removal Of Specific Substances (AREA)
  • Catalysts (AREA)
EP80810042A 1979-02-09 1980-02-05 Procédé de traitement de matériaux pour le blanchiment des couleurs à l'argent, préparation aqueuse à cet effet, concentrat et procédé de fabrication de la préparation Expired EP0014688B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT80810042T ATE2864T1 (de) 1979-02-09 1980-02-05 Verfahren zur verarbeitung von silberfarbbleichmaterialien, waessrige zubereitung hierfuer, konzentrat und verfahren zur herstellung der zubereitung.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH1293/79 1979-02-09
CH129379 1979-02-09

Publications (3)

Publication Number Publication Date
EP0014688A2 true EP0014688A2 (fr) 1980-08-20
EP0014688A3 EP0014688A3 (en) 1981-11-25
EP0014688B1 EP0014688B1 (fr) 1983-03-23

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EP80810042A Expired EP0014688B1 (fr) 1979-02-09 1980-02-05 Procédé de traitement de matériaux pour le blanchiment des couleurs à l'argent, préparation aqueuse à cet effet, concentrat et procédé de fabrication de la préparation

Country Status (6)

Country Link
US (1) US4304846A (fr)
EP (1) EP0014688B1 (fr)
JP (1) JPS55106455A (fr)
AT (1) ATE2864T1 (fr)
CA (1) CA1165165A (fr)
DE (1) DE3062384D1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0133163A2 (fr) * 1983-07-20 1985-02-13 Ciba-Geigy Ag Procédé pour traiter des matériaux photographiques pour blanchiment des couleurs à l'argent
EP0149978A2 (fr) * 1984-01-20 1985-07-31 Ilford Ag Procédé pour la réalisation d'images photographiques par le procédé de blanchiment des couleurs à l'argent
EP0219113A3 (en) * 1985-10-15 1989-03-29 Fuji Photo Film Co., Ltd. Method of processing silver halide color photographic material

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4404273A (en) * 1980-12-15 1983-09-13 Ciba-Geigy Ag Process for the production of photographic color images by the silver dye bleach process
US5262285A (en) * 1992-05-04 1993-11-16 Eastman Kodak Company Methods and compositions for retouching film images
US5569443A (en) * 1994-11-18 1996-10-29 The Dow Chemical Company Method for removing hydrogen sulfide from a gas using polyamino disuccinic acid
US5741555A (en) * 1995-05-22 1998-04-21 The Dow Chemical Company Succinic acid derivative degradable chelants, uses and compositions thereof
US5652085A (en) * 1995-08-30 1997-07-29 Eastman Kodak Company Succinic acid derivative degradable chelants, uses and composition thereof
US5585226A (en) * 1995-08-30 1996-12-17 Eastman Kodak Company Polyamino monoesuccinates for use in photographic processes
US7267259B2 (en) * 1999-02-17 2007-09-11 Ronald Redline Method for enhancing the solderability of a surface
US6544397B2 (en) 1996-03-22 2003-04-08 Ronald Redline Method for enhancing the solderability of a surface
US6905587B2 (en) * 1996-03-22 2005-06-14 Ronald Redline Method for enhancing the solderability of a surface
USRE45842E1 (en) 1999-02-17 2016-01-12 Ronald Redline Method for enhancing the solderability of a surface
US6358954B1 (en) * 1999-11-09 2002-03-19 Yissum Research Development Company Of The Hebrew University Of Jerusalem PDGF receptor kinase inhibitory compounds, their preparation, purification and pharmaceutical compositions including same
EP1172691A1 (fr) * 2000-07-12 2002-01-16 ILFORD Imaging Switzerland GmbH Procédé et solutions de blanchiment pour le traitement de produits photographiques pour la préparation d'images suivant le procédé de blanchiment des couleurs à l'argent
JP2019149903A (ja) * 2018-02-28 2019-09-05 シナノケンシ株式会社 電動機

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1270949B (de) * 1966-09-21 1968-06-20 Agfa Gevaert Ag Waessriges Farbbleichbad fuer das Silberfarbbleichverfahren
DE2547720A1 (de) * 1974-10-28 1976-04-29 Ciba Geigy Ag Verfahren zur herstellung maskierter positiver farbbilder nach dem silberfarbbleichverfahren
DE2722776A1 (de) * 1976-05-24 1977-12-08 Ciba Geigy Ag Chinoxaline und deren verwendung in photographischen verfahren
DE2722777A1 (de) * 1976-05-24 1977-12-08 Ciba Geigy Ag Chinoxaline und deren verwendung in photographischen verfahren

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB539509A (en) * 1940-01-11 1941-09-15 Eastman Kodak Co Improvements in or relating to the production of colour photographs
GB539190A (en) * 1940-02-22 1941-09-01 Eastman Kodak Co Method of colour photography and materials therefor
GB1051970A (fr) * 1964-03-20
CH433980A (de) * 1964-07-07 1967-04-15 Ciba Geigy Verwendung von Acylaminoverbindungen als Farbbleichkatalysatoren für das Silberfarbbleichverfahren
CH508226A (de) * 1969-03-13 1971-05-31 Ciba Geigy Ag Verwendung von Chinoxalinen als Farbbleichkatalysatoren
CH553428A (de) * 1970-09-04 1974-08-30 Ciba Geigy Ag Verwendung von chinoxalinen als wasserstoffuebertraeger.
US4202698A (en) * 1976-05-24 1980-05-13 Ciba-Geigy Ag Quinoxalines and their use in photographic processes

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1270949B (de) * 1966-09-21 1968-06-20 Agfa Gevaert Ag Waessriges Farbbleichbad fuer das Silberfarbbleichverfahren
DE2547720A1 (de) * 1974-10-28 1976-04-29 Ciba Geigy Ag Verfahren zur herstellung maskierter positiver farbbilder nach dem silberfarbbleichverfahren
DE2722776A1 (de) * 1976-05-24 1977-12-08 Ciba Geigy Ag Chinoxaline und deren verwendung in photographischen verfahren
DE2722777A1 (de) * 1976-05-24 1977-12-08 Ciba Geigy Ag Chinoxaline und deren verwendung in photographischen verfahren

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0133163A2 (fr) * 1983-07-20 1985-02-13 Ciba-Geigy Ag Procédé pour traiter des matériaux photographiques pour blanchiment des couleurs à l'argent
EP0133163A3 (en) * 1983-07-20 1985-08-14 Ciba-Geigy Ag Method of processing photographic silver dye-bleaching materials
EP0149978A2 (fr) * 1984-01-20 1985-07-31 Ilford Ag Procédé pour la réalisation d'images photographiques par le procédé de blanchiment des couleurs à l'argent
EP0149978A3 (en) * 1984-01-20 1988-08-31 Ciba-Geigy Ag Process for the production of photographic images by the silver dye-bleaching process
EP0219113A3 (en) * 1985-10-15 1989-03-29 Fuji Photo Film Co., Ltd. Method of processing silver halide color photographic material

Also Published As

Publication number Publication date
CA1165165A (fr) 1984-04-10
US4304846A (en) 1981-12-08
JPS55106455A (en) 1980-08-15
EP0014688B1 (fr) 1983-03-23
ATE2864T1 (de) 1983-04-15
EP0014688A3 (en) 1981-11-25
DE3062384D1 (en) 1983-04-28
JPS5735453B2 (fr) 1982-07-29

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