GB280525A - - Google Patents

Info

Publication number
GB280525A
GB280525A GB29011/27A GB2901127A GB280525A GB 280525 A GB280525 A GB 280525A GB 29011/27 A GB29011/27 A GB 29011/27A GB 2901127 A GB2901127 A GB 2901127A GB 280525 A GB280525 A GB 280525A
Authority
GB
United Kingdom
Prior art keywords
cyanide
development
developer
layer
mercuriccyanide
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
GB29011/27A
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.)
IG Farbenindustrie AG
Original Assignee
IG Farbenindustrie 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 IG Farbenindustrie AG filed Critical IG Farbenindustrie AG
Publication of GB280525A publication Critical patent/GB280525A/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
    • G03C5/32—Latensification; Densensitisation

Landscapes

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

Abstract

280,525. I. G. Farbenindustrie Akt.- Ges. Nov. 13, 1926, [Convention date]. Developing.-A cyanide of a heavy metal such as mercury, cobalt,. or cadmium is added to a photographic developer in order to desensitize the sensitive silver halide layer' in the initial stage of development and permit the completion of the operation in bright yellow light. The presence of such a cyanide also diminishes the tendency of the layer to fog, and its addition is therefore advantageous in tank development. Examples are given of metol-hydroquinone developers containing 0.3 gram of mercuriccyanide to 1 litre of developer.
GB29011/27A 1926-11-13 1927-10-31 Expired GB280525A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEI0029507 1926-11-13

Publications (1)

Publication Number Publication Date
GB280525A true GB280525A (en) 1928-02-16

Family

ID=7187341

Family Applications (1)

Application Number Title Priority Date Filing Date
GB29011/27A Expired GB280525A (en) 1926-11-13 1927-10-31

Country Status (4)

Country Link
US (1) US1713613A (en)
BE (1) BE344630A (en)
FR (1) FR641409A (en)
GB (1) GB280525A (en)

Also Published As

Publication number Publication date
FR641409A (en) 1928-08-03
US1713613A (en) 1929-05-21
BE344630A (en)

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