GB489299A - Improvements in or relating to the chemical treatment of photographic images - Google Patents

Improvements in or relating to the chemical treatment of photographic images

Info

Publication number
GB489299A
GB489299A GB2016/37A GB201637A GB489299A GB 489299 A GB489299 A GB 489299A GB 2016/37 A GB2016/37 A GB 2016/37A GB 201637 A GB201637 A GB 201637A GB 489299 A GB489299 A GB 489299A
Authority
GB
United Kingdom
Prior art keywords
colour
layers
images
bleached
film
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
GB2016/37A
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to GB2016/37A priority Critical patent/GB489299A/en
Priority to US184096A priority patent/US2196226A/en
Publication of GB489299A publication Critical patent/GB489299A/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
    • 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
    • G03C7/407—Development processes or agents therefor
    • G03C7/413—Developers
    • 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
    • G03C5/261—Non-bath processes, e.g. using pastes, webs, viscous compositions

Abstract

489,299. Colour photography. MURRAY, H. D., and SPENCER, D. A. Jan. 22, 1937, No. 2016. [Class 98 (ii)] Exposed photographic material of the kind having one or more photographic layers on each side of the support is colour developed with two different colour developing solutions by applying to one side a coating layer of one of the colour developing solutions which has been thickened by the addition to it of sufficient thickening agent to render it highly viscous when in position on the material or to render it capable of being set to a gel on cooling, and by applying to the other side a coating layer of the other colour developer solution which has been thickened in a similar manner, leaving the coatings in position for sufficient time for them .to develop the images in the photographic layers and then removing the coatings. Suitable thickening agents are gelatine, glue, gums, and boiled starch. In an example, a film bearing on each side a hardened gelatine layer containing a silver colour component image produced by exposure, development, fixing, washing, and drying is bleached in a bath containing potassium ferricyanide and sodium chloride, which converts the images to silver chloride. The images may also be bleached to silver bromide. The film is washed and surface moisture removed by a current of air. The bleached images are rendered developable by exposure to light. The coating of colour developer thickened with gelatine may be applied warm to one side by rollers, and allowed to cool or chilled, and a coating of a different colour developer is applied to the other side. The layers may be left in position from 4 to 6 minutes, and then removed by washing in or spraying with warm water or by scrapers or by a rotating wheel. The developed silver is removed with Farmer's reducer. The coating layer may be highly viscous instead of being allowed to set. Colour developing formulµ are given, and may include ethyl glycol and diethanolamine. Colour formers referred to are 1: 5-dihydroxynaphthalene, 1 : 3-diphenyl - 5 - pyrazolone, 1 - p - nitrophenyl - 3 - methyl-5-pyrazoloiie, 1-phenyl-3-furyl-5-pyrazolone, alpha-chlor-acetoacet-p-toluidide, and p-nitrophenylacetonitrile. The process may be applied to a film having two layers on one side of the support and one or two layers on the other side of the support. The process may be applied to an exposed film that has not been developed and bleached. Specifications 308,803, [Class 98 (ii)], and 420,356 are referred to.
GB2016/37A 1937-01-22 1937-01-22 Improvements in or relating to the chemical treatment of photographic images Expired GB489299A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
GB2016/37A GB489299A (en) 1937-01-22 1937-01-22 Improvements in or relating to the chemical treatment of photographic images
US184096A US2196226A (en) 1937-01-22 1938-01-08 Chemical treatment of photographic images

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2016/37A GB489299A (en) 1937-01-22 1937-01-22 Improvements in or relating to the chemical treatment of photographic images

Publications (1)

Publication Number Publication Date
GB489299A true GB489299A (en) 1938-07-22

Family

ID=9732108

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2016/37A Expired GB489299A (en) 1937-01-22 1937-01-22 Improvements in or relating to the chemical treatment of photographic images

Country Status (2)

Country Link
US (1) US2196226A (en)
GB (1) GB489299A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1304593A1 (en) * 2001-10-09 2003-04-23 Tetenal Photowerk GmbH & Co. KG Photographic reagent

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE444784A (en) * 1939-11-02
US2500421A (en) * 1944-11-03 1950-03-14 Polaroid Corp Photographic silver halide transfer process
US2546400A (en) * 1945-12-11 1951-03-27 Du Pont Color yielding elements for color photography
US2616807A (en) * 1946-11-29 1952-11-04 Polaroid Corp Silver halide developer containing a film-forming plastic and a water insoluble finely comminuted solid substance
US2603565A (en) * 1947-01-15 1952-07-15 Polaroid Corp Photographic film forming image transfer composition
US2653527A (en) * 1947-02-19 1953-09-29 Polaroid Corp Process for treating photosensitive materials by spreading thereon a layer of processing liquid and apparatus for performing said process
US2647056A (en) * 1948-02-12 1953-07-28 Polaroid Corp One step photographic transfer process
US8465504B2 (en) 2011-01-25 2013-06-18 Isuturing, Llc Devices and methods for continuous surgical suturing

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1304593A1 (en) * 2001-10-09 2003-04-23 Tetenal Photowerk GmbH & Co. KG Photographic reagent

Also Published As

Publication number Publication date
US2196226A (en) 1940-04-09

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