EP0468325A1 - Bain de blanchissement - Google Patents

Bain de blanchissement Download PDF

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Publication number
EP0468325A1
EP0468325A1 EP91111713A EP91111713A EP0468325A1 EP 0468325 A1 EP0468325 A1 EP 0468325A1 EP 91111713 A EP91111713 A EP 91111713A EP 91111713 A EP91111713 A EP 91111713A EP 0468325 A1 EP0468325 A1 EP 0468325A1
Authority
EP
European Patent Office
Prior art keywords
mol
layer
bleaching
bath
schicht
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
EP91111713A
Other languages
German (de)
English (en)
Other versions
EP0468325B1 (fr
Inventor
Gustav Tappe
Ralf Dr. Wichmann
Heinz Dr. Meckl
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.)
Agfa Gevaert AG
Original Assignee
Agfa Gevaert AG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Priority claimed from DE19904023817 external-priority patent/DE4023817A1/de
Priority claimed from DE19904029805 external-priority patent/DE4029805A1/de
Application filed by Agfa Gevaert AG filed Critical Agfa Gevaert AG
Publication of EP0468325A1 publication Critical patent/EP0468325A1/fr
Application granted granted Critical
Publication of EP0468325B1 publication Critical patent/EP0468325B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

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
    • 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
    • G03C7/30—Colour processes using colour-coupling substances; Materials therefor; Preparing or processing such materials
    • G03C7/42—Bleach-fixing or agents therefor ; Desilvering processes

Definitions

  • the invention relates to a bleaching bath which is suitable for processing color photographic silver halide materials and which is particularly environmentally friendly.
  • Iron complex salts of aminopolycarboxylic acids for example the iron ammonium complex salt of ethylenediaminetetraacetic acid, are usually used to bleach the silver formed during the development of color photographic materials. This and similar complexing agents that are also used are only very slowly biodegradable.
  • bleaching baths containing iron complexes of readily biodegradable complexing agents such as nitrilotriacetic acid are used for bleaching color photographic materials under the usual conditions at pH 6 to 8, they lack sufficient bleaching capacity.
  • the object of the invention was to provide a bleaching bath which is suitable for processing color photographic silver halide materials and which contains readily biodegradable constituents and has a sufficient bleaching effect.
  • a bleaching bath which contains (1) an iron (III) complex, the complexing agent of which is at least 20 mol%, preferably at least 80 mol%, of the formula I. corresponds, and
  • the bleaching bath can contain thiosulfate, but at most in an amount which is insufficient to fix the undeveloped silver halide.
  • the amount of thiosulfate is preferably less than 0.03 mol / l; in particular, the bleaching bath is free of thiosulfate.
  • complexing agents can be conventional complexing agents such as ethylenediaminetetraacetic acid, propylenediaminetetraacetic acid, nitrilotriacetic acid or nitrilodipropion monoacetic acid or mixtures of these compounds. Only the complexing agents according to the invention are preferably used.
  • bleaching baths also contain a halide for rehalogenating the silver.
  • the halides of the bleaching baths are in particular the chlorides and bromides of sodium, potassium and ammonium.
  • the bleach bath When ready for use, the bleach bath contains 0.05 to 2.0 mol / l halide.
  • the bleaching bath preferably contains an excess of 1 to 120 mol%, preferably 5 to 20 mol%, based on the iron complex, of free complexing agent.
  • the bleaching bath according to the invention is particularly suitable for color photographic silver halide recording materials whose silver halide emulsions consist predominantly of AgBr, AgBrl, AgBrCI or AgCI.
  • the color photographic material preferably contains on a reflective or transparent support (for example paper coated on both sides with polyethylene or cellulose triacetate film) at least one blue-sensitive, at least one green-sensitive and at least one red-sensitive silver halide emulsion layer, to which at least one yellow coupler, at least one magenta coupler and at least one cyan coupler in the order given assigned.
  • the bleaching bath according to the invention is used within the usual processing method for color photographic silver halide materials and is suitable for bleaching all known color photographic silver halide materials such as color negative films, color negative paper, color reversal films and color reversal paper.
  • the processing method can be carried out continuously with constant regeneration of the individual processing baths.
  • the bleaching baths listed in the examples were examined for their bleaching behavior (residual silver in the processed material).
  • the exposed step wedge of the photographic material which was subsequently processed as described below, was examined for residual silver in the image blackness using an infrared silver detector PM 8030 from Photo-Matic, Denmark.
  • a color photographic recording material was produced by applying the following layers in the order given to a support on paper coated on both sides with polyethylene. The amounts given relate in each case to 1 m 2. The corresponding amounts of AgNO 3 are given for the silver halide application.
  • Example 1 The exposure and processing were carried out as described in Example 1.
  • the developer had the same composition as in Example 1.
  • Example 1 The exposure and processing were carried out as described in Example 1.
  • the developer had the same composition as in Example 1.
  • Table 1 shows the good bleaching action of the bleaching bath A according to the invention, which contains a biodegradable complexing agent.
  • the bleaching effect corresponds to that of the usual bleaching bath C, which contains the biodegradable EDTA.
  • the bleaching bath B which is composed essentially like bleaching bath A, but lies in the pH range prescribed for EDTA bleaching baths, on the other hand only bleaches insufficiently.
  • the amounts given relate in each case to 1 m 2.
  • the equivalent amounts of AgN0 3 are given.
  • a step wedge was exposed on the photographic material described above and processed as follows:
  • the processing baths had the following composition:
  • the result with regard to residual silver is shown in Table 2 below.
  • the color image produced was of the type.
  • the bleaching action of the bleaching bath D according to the invention with a biodegradable complexing agent corresponds to the bleaching action of the customary bleaching bath F with the biodegradable complexing agent EDTA.
  • the bleaching bath E which is composed essentially like bleaching bath D, but has a pH value customary for EDTA bleaching baths, on the other hand only bleaches insufficiently.
  • the bleaching tests carried out showed that the bleaching bath D according to the invention does not lead to the formation of leuco blue-green dye, while in a conventional bleaching bath with EDTA there are significant losses of blue-green dye at the corresponding pH.
  • the samples produced in this way were exposed under a step part and processed as follows:
  • the processing baths had the following composition:
  • Example 7 The exposure and processing were carried out as described in Example 7. With the exception of the bleach bath, all processing baths had the same composition as in Example 7.
  • Example 7 The exposure and processing were carried out as described in Example 7. With the exception of the bleach bath, all processing baths had the same composition as in Example 7.
  • the bleaching action of the bleaching bath G according to the invention with a biodegradable complexing agent corresponds to the bleaching action of the conventional bleaching bath I with the biodegradable complexing agent EDTA.
  • the bleaching bath H which is composed essentially like bleaching bath G, but has a pH value customary for EDTA bleaching baths, on the other hand only bleaches insufficiently.

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Silver Salt Photography Or Processing Solution Therefor (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
EP91111713A 1990-07-27 1991-07-13 Bain de blanchissement Expired - Lifetime EP0468325B1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE4023817 1990-07-27
DE19904023817 DE4023817A1 (de) 1990-07-27 1990-07-27 Bleichbad
DE4029805 1990-09-20
DE19904029805 DE4029805A1 (de) 1990-09-20 1990-09-20 Bleichbad

Publications (2)

Publication Number Publication Date
EP0468325A1 true EP0468325A1 (fr) 1992-01-29
EP0468325B1 EP0468325B1 (fr) 1995-11-22

Family

ID=25895395

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91111713A Expired - Lifetime EP0468325B1 (fr) 1990-07-27 1991-07-13 Bain de blanchissement

Country Status (3)

Country Link
EP (1) EP0468325B1 (fr)
JP (1) JPH04251845A (fr)
DE (1) DE59106932D1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0534086A1 (fr) * 1991-07-26 1993-03-31 Konica Corporation Solution de blanchiment pour procédé photographique en couleurs
US5627015A (en) * 1993-12-07 1997-05-06 Fuji Photo Film Co., Ltd. Method for processing silver halide color photographic material
US6824965B2 (en) 2000-08-04 2004-11-30 Agfa-Gevaert Bleach bath

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1980000624A1 (fr) * 1978-09-14 1980-04-03 Eastman Kodak Co Composition de blanchiment photographique et procede de developpement photographique
EP0270217A2 (fr) * 1986-10-08 1988-06-08 Konica Corporation Solution de blanchiment-fixage ayant un bon rendement de traitement et méthode de traitement d'un matériau sensible à la lumière l'utilisant
EP0293729A1 (fr) * 1987-05-25 1988-12-07 Konica Corporation Composition contenant un complexe de sel ferrique
US4914008A (en) * 1985-04-25 1990-04-03 Konishiroku Photo Industry Co., Ltd. Processing method of light-sensitive silver halide color photographic material

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3770437A (en) * 1972-04-06 1973-11-06 D Brugger Photographic bleach compositions
JPS5165939A (ja) * 1974-12-05 1976-06-08 Fuji Photo Film Co Ltd Karaashashinzairyono shorihoho
JPS60263152A (ja) * 1984-06-12 1985-12-26 Konishiroku Photo Ind Co Ltd ハロゲン化銀カラ−写真感光材料用の漂白能を有する処理液
JPS61248044A (ja) * 1985-04-25 1986-11-05 Konishiroku Photo Ind Co Ltd ハロゲン化銀カラ−写真感光材料の処理方法
JPH06103383B2 (ja) * 1985-05-27 1994-12-14 コニカ株式会社 カラ−写真画像の形成方法

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1980000624A1 (fr) * 1978-09-14 1980-04-03 Eastman Kodak Co Composition de blanchiment photographique et procede de developpement photographique
US4914008A (en) * 1985-04-25 1990-04-03 Konishiroku Photo Industry Co., Ltd. Processing method of light-sensitive silver halide color photographic material
EP0270217A2 (fr) * 1986-10-08 1988-06-08 Konica Corporation Solution de blanchiment-fixage ayant un bon rendement de traitement et méthode de traitement d'un matériau sensible à la lumière l'utilisant
EP0293729A1 (fr) * 1987-05-25 1988-12-07 Konica Corporation Composition contenant un complexe de sel ferrique

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0534086A1 (fr) * 1991-07-26 1993-03-31 Konica Corporation Solution de blanchiment pour procédé photographique en couleurs
US5627015A (en) * 1993-12-07 1997-05-06 Fuji Photo Film Co., Ltd. Method for processing silver halide color photographic material
US6824965B2 (en) 2000-08-04 2004-11-30 Agfa-Gevaert Bleach bath

Also Published As

Publication number Publication date
DE59106932D1 (de) 1996-01-04
JPH04251845A (ja) 1992-09-08
EP0468325B1 (fr) 1995-11-22

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