GB1324515A - Process for the removal of metallic silver from photographic material - Google Patents

Process for the removal of metallic silver from photographic material

Info

Publication number
GB1324515A
GB1324515A GB3530370A GB3530370A GB1324515A GB 1324515 A GB1324515 A GB 1324515A GB 3530370 A GB3530370 A GB 3530370A GB 3530370 A GB3530370 A GB 3530370A GB 1324515 A GB1324515 A GB 1324515A
Authority
GB
United Kingdom
Prior art keywords
silver
baths
salts
bleach
bath
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.)
Expired
Application number
GB3530370A
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.)
Novartis AG
Original Assignee
Ciba Geigy 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
Application filed by Ciba Geigy AG filed Critical Ciba Geigy AG
Publication of GB1324515A publication Critical patent/GB1324515A/en
Expired legal-status Critical Current

Links

Classifications

    • GPHYSICS
    • G03PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03CPHOTOSENSITIVE MATERIALS FOR PHOTOGRAPHIC PURPOSES; PHOTOGRAPHIC PROCESSES, e.g. CINE, X-RAY, COLOUR, STEREO-PHOTOGRAPHIC PROCESSES; AUXILIARY PROCESSES IN PHOTOGRAPHY
    • G03C5/00Photographic processes or agents therefor; Regeneration of such processing agents
    • G03C5/26Processes using silver-salt-containing photosensitive materials or agents therefor
    • G03C5/40Chemically transforming developed images
    • G03C5/44Bleaching; Bleach-fixing
    • GPHYSICS
    • G03PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03CPHOTOSENSITIVE MATERIALS FOR PHOTOGRAPHIC PURPOSES; PHOTOGRAPHIC PROCESSES, e.g. CINE, X-RAY, COLOUR, STEREO-PHOTOGRAPHIC PROCESSES; AUXILIARY PROCESSES IN PHOTOGRAPHY
    • G03C7/00Multicolour photographic processes or agents therefor; Regeneration of such processing agents; Photosensitive materials for multicolour processes
    • G03C7/28Silver dye bleach processes; Materials therefor; Preparing or processing such materials
    • GPHYSICS
    • G03PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03CPHOTOSENSITIVE MATERIALS FOR PHOTOGRAPHIC PURPOSES; PHOTOGRAPHIC PROCESSES, e.g. CINE, X-RAY, COLOUR, STEREO-PHOTOGRAPHIC PROCESSES; AUXILIARY PROCESSES IN PHOTOGRAPHY
    • G03C7/00Multicolour photographic processes or agents therefor; Regeneration of such processing agents; Photosensitive materials for multicolour processes
    • G03C7/30Colour processes using colour-coupling substances; Materials therefor; Preparing or processing such materials
    • G03C7/42Bleach-fixing or agents therefor ; Desilvering processes
    • G03C7/421Additives other than bleaching or fixing agents

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Silver Salt Photography Or Processing Solution Therefor (AREA)

Abstract

1324515 Photographic silver bleach baths CIBA-GEIGY A G 21 July 1970 [30 July 1969] 35303/70 Heading G2C Photographic silver bleach baths which will remove silver but not silver salts from developed silver salt materials comprise an acid bath free from anions that form sparingly soluble silver salts i.e. having a solubility product of less than 10<SP>-8À5</SP>(mole/litre)<SP>2</SP> at 25‹C (e.g. halide and ferricyanide ions), which bath contains (i) an oxidant having a standard redox potential of from +0À15 up to but excluding +0À8 volt, (e.g. cupric or ferric salts or a quinone), and (ii) a silver ion complexing agent having a silver complex stability constant of from 10<SP>1</SP> to 10<SP>9</SP>(litre/mole)<SP>2</SP>, (e.g. alkyl alcohol, a nitrile such as acetonitrile, pyrazine, thiophene or a water-soluble thioether such as thiodiglycol, thiodipropionic acid and 2-hydroxyethyl-methyl sulphide), said bath not containing an oxidant or a complexing agent having properties lying outside the above ranges. The baths are suitable for bleaching of silver during reversal processing, especially the reversal processing of silver-dye-bleach materials.
GB3530370A 1969-07-30 1970-07-21 Process for the removal of metallic silver from photographic material Expired GB1324515A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH1160569A CH511456A (en) 1969-07-30 1969-07-30 Process for removing metallic silver from photographic material

Publications (1)

Publication Number Publication Date
GB1324515A true GB1324515A (en) 1973-07-25

Family

ID=4375095

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3530370A Expired GB1324515A (en) 1969-07-30 1970-07-21 Process for the removal of metallic silver from photographic material

Country Status (8)

Country Link
US (1) US3716362A (en)
BE (1) BE754080A (en)
CA (1) CA942559A (en)
CH (1) CH511456A (en)
DE (1) DE2037684A1 (en)
FR (1) FR2055511A5 (en)
GB (1) GB1324515A (en)
NL (1) NL7011234A (en)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3893858A (en) * 1973-03-26 1975-07-08 Eastman Kodak Co Photographic bleach accelerators
JPS522433A (en) * 1975-06-23 1977-01-10 Fuji Photo Film Co Ltd Single bath color element silver branching liquid
CH597627A5 (en) * 1975-11-17 1978-04-14 Ciba Geigy Ag
US4125402A (en) * 1976-08-19 1978-11-14 Ciba-Geigy Ag Method of processing silver dye bleaching materials and preparations suitable for the dye and silver bleaching
JPS5820424B2 (en) * 1976-10-12 1983-04-22 富士写真フイルム株式会社 Color image forming method
JPS586937B2 (en) * 1977-10-26 1983-02-07 富士写真フイルム株式会社 Color image forming method
DE2748430A1 (en) * 1977-10-28 1979-05-03 Agfa Gevaert Ag PHOTOGRAPHIC BLEACHING COMPOSITIONS WITH BLADE ACCELERATING COMPOUNDS
WO1991008517A1 (en) * 1989-12-04 1991-06-13 Fuji Photo Film Co., Ltd. Process for treating silver halide photographic meterial and composition therefor
US5508150A (en) * 1993-12-29 1996-04-16 Eastman Kodak Company Fixer additives used in combination with iron complex based bleaches to prevent iron retention
US5434035A (en) * 1993-12-29 1995-07-18 Eastman Kodak Company Fixer additives used in combination with iron complex based bleaches to improve desilvering

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2020775A (en) * 1930-11-07 1935-11-12 Bela Gaspar Method of producing photographic pictures in colors
NL44564C (en) * 1934-06-15
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
US2322001A (en) * 1940-10-10 1943-06-15 Eastman Kodak Co Method of producing dye images
US2529981A (en) * 1945-11-28 1950-11-14 Eastman Kodak Co Bleaching silver images
US2699394A (en) * 1950-12-15 1955-01-11 Gaspar Bela Production of photographic dye images
BE520411A (en) * 1952-06-07 1955-06-24
US2748000A (en) * 1954-04-01 1956-05-29 Eastman Kodak Co Removing silver and silver halide from photographic elements

Also Published As

Publication number Publication date
US3716362A (en) 1973-02-13
CA942559A (en) 1974-02-26
BE754080A (en) 1971-01-29
DE2037684A1 (en) 1971-02-25
FR2055511A5 (en) 1971-05-07
CH511456A (en) 1971-08-15
NL7011234A (en) 1971-02-02

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PLNP Patent lapsed through nonpayment of renewal fees