GB1315896A - Photographic silver-bleaching composition - Google Patents

Photographic silver-bleaching composition

Info

Publication number
GB1315896A
GB1315896A GB3791271A GB3791271A GB1315896A GB 1315896 A GB1315896 A GB 1315896A GB 3791271 A GB3791271 A GB 3791271A GB 3791271 A GB3791271 A GB 3791271A GB 1315896 A GB1315896 A GB 1315896A
Authority
GB
United Kingdom
Prior art keywords
alkyl
water
photographic silver
bleaching composition
composition
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
GB3791271A
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.)
Eastman Kodak Co
Original Assignee
Eastman Kodak Co
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 Eastman Kodak Co filed Critical Eastman Kodak Co
Publication of GB1315896A publication Critical patent/GB1315896A/en
Expired 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

Landscapes

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

Abstract

1315896 Photographic silver bleaching composition EASTMAN KODAK CO 12 Aug 1971 17 Aug 1970] 37912/71 Heading G2C A photographic silver bleaching composition comprises a nuclear substituted aromatic amine and either a water-soluble persulphate salt or a water-soluble nitrosodisulphonate salt in aqueous solution. The aromatic amine may have the formula: - wherein X and Y are each Hor 1-4C alkyl; and R<SP>1</SP>, R<SP>2</SP>, R<SP>3</SP>, R<SP>4</SP> and R<SP>5</SP> are each H, an amino group, OH, 1-4C alkyl, mono (1-4C alkyl) amino, or di (1-4C alkyl) amino providing that at least one of the groups R<SP>1</SP>, R<SP>2</SP>, R<SP>3</SP>, R<SP>4</SP> and R<SP>5</SP> is not H. The water-soluble salts may be of ammonium or an alkali metal such as sodium, potassium or lithium. The composition may be buffered in the range from 1À9 to 9, e.g. 6. The composition may contain an alkali metal bromide. The compositions may be used to bleach silver in black and white or colour materials, without affecting image dyes or otherwise causing stains or water pollution when exhausted.
GB3791271A 1970-08-17 1971-08-12 Photographic silver-bleaching composition Expired GB1315896A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US6462570A 1970-08-17 1970-08-17

Publications (1)

Publication Number Publication Date
GB1315896A true GB1315896A (en) 1973-05-02

Family

ID=22057217

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3791271A Expired GB1315896A (en) 1970-08-17 1971-08-12 Photographic silver-bleaching composition

Country Status (4)

Country Link
US (1) US3707374A (en)
CA (1) CA966350A (en)
FR (1) FR2104270A5 (en)
GB (1) GB1315896A (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5525412B2 (en) * 1973-06-11 1980-07-05
JPS5883852A (en) * 1981-11-13 1983-05-19 Fuji Photo Film Co Ltd Method for bleaching color photographic material
JPH06214365A (en) * 1992-12-14 1994-08-05 Eastman Kodak Co Bleaching accelerator, bleaching composition and photographic element
US5510232A (en) * 1994-12-22 1996-04-23 Eastman Kodak Company Photographic processing composition and method using cationic hydroquinone as organic catalyst for persulfate bleaching agent
DE19549103A1 (en) * 1995-12-29 1997-07-03 Agfa Gevaert Ag Bleach bath for black and white photographic material

Also Published As

Publication number Publication date
FR2104270A5 (en) 1972-04-14
DE2141199B2 (en) 1977-05-18
CA966350A (en) 1975-04-22
US3707374A (en) 1972-12-26
DE2141199A1 (en) 1972-03-09

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PCNP Patent ceased through non-payment of renewal fee