GB1351450A - Bleaching of silver images in photographic elements - Google Patents

Bleaching of silver images in photographic elements

Info

Publication number
GB1351450A
GB1351450A GB4487570A GB1351450DA GB1351450A GB 1351450 A GB1351450 A GB 1351450A GB 4487570 A GB4487570 A GB 4487570A GB 1351450D A GB1351450D A GB 1351450DA GB 1351450 A GB1351450 A GB 1351450A
Authority
GB
United Kingdom
Prior art keywords
iodide
photographic
silver
bleaching
solution
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
GB4487570A
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 NV
Agfa Gevaert AG
Original Assignee
Agfa Gevaert NV
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
Application filed by Agfa Gevaert NV, Agfa Gevaert AG filed Critical Agfa Gevaert NV
Publication of GB1351450A publication Critical patent/GB1351450A/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

1351450 Photographic silver bleaching solution AGFA-GEVAERT 6 Aug 1971 [21 Sept 1970] 44875/70 Heading G2C A developed silver image in a metallic silver containing photographic element is bleached so as to completely remove the silver image with a solution containing an alkali metal or ammonium dichromate as oxidizing agent, and a watersoluble iodide, the weight ratio of dichromate to iodide being between 50:1 and 1:1. The iodide may be potassium iodide. The element may be a photographic multilayer colour material. The solution may also contain an alkali metal chloride or bromide e.g. KBr.
GB4487570A 1970-09-21 1970-09-21 Bleaching of silver images in photographic elements Expired GB1351450A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB4487570 1970-09-21

Publications (1)

Publication Number Publication Date
GB1351450A true GB1351450A (en) 1974-05-01

Family

ID=10435074

Family Applications (1)

Application Number Title Priority Date Filing Date
GB4487570A Expired GB1351450A (en) 1970-09-21 1970-09-21 Bleaching of silver images in photographic elements

Country Status (4)

Country Link
US (1) US3761260A (en)
BE (1) BE771382A (en)
DE (1) DE2145420A1 (en)
GB (1) GB1351450A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2299681A (en) * 1995-04-04 1996-10-09 Agfa Gevaert Ag Photographic bleach bath

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4113486A (en) * 1973-10-22 1978-09-12 Fuji Photo Film Co., Ltd. Method for producing a photomask

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2299681A (en) * 1995-04-04 1996-10-09 Agfa Gevaert Ag Photographic bleach bath

Also Published As

Publication number Publication date
BE771382A (en) 1972-02-17
US3761260A (en) 1973-09-25
DE2145420A1 (en) 1973-07-26

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
435 Patent endorsed 'licences of right' on the date specified (sect. 35/1949)
PLNP Patent lapsed through nonpayment of renewal fees