US2568208A - Color photography - Google Patents

Color photography Download PDF

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Publication number
US2568208A
US2568208A US737992A US73799247A US2568208A US 2568208 A US2568208 A US 2568208A US 737992 A US737992 A US 737992A US 73799247 A US73799247 A US 73799247A US 2568208 A US2568208 A US 2568208A
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US
United States
Prior art keywords
layer
positive
colour
negative
magenta
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 - Lifetime
Application number
US737992A
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English (en)
Inventor
Fraunhofer Hans Von
Coote Harry Edward
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Individual
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Individual
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Filing date
Publication date
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Application granted granted Critical
Publication of US2568208A publication Critical patent/US2568208A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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

Definitions

  • This invention relates to a process of colour vphotography in which the sensitive materials employed are of the chromogenic integral' monopack type.
  • the sensitive material employed comprises a Celluloid or other base and ve superimposed coating layers, namely three layers of emulsion separated from each other by two lter layers of gelatine.
  • the productionl of such material requires five separate coating operations and the productive capacity ofi any givenv coating plant is correspondingly reduced.
  • positive material comprising an, emulsion layer 2 containing a magenta colour former superimposed on an emulsion layer containing a bluegreen colour former, is printed onto from a two colour analysis negative in such manner that an image corresponding to the red-yellow colour values is formed in the emulsion layer containing the magenta colour former and an image corresponding tothe blue-green colour values is formed in the emulsion layer containing the blue-green colour former, and thev emulsion layer containing the magenta coloured image isv then treated with a colour rectifier solution which selectively deposits yellow in the silver image.
  • a neg-ative material comprising a carrier or base coated successively with a red Sensitive emulsion layer containing a magenta colour former, a, yellow filter layer and a blue-green sensitive emulsion layer containing a blue-green colour former.
  • a two emulsion material of this type is far simpler and considerably less expensive to produce than a three emulsion material with two filter layers, nor is its ⁇ production nearly as critical as thel latter material because adjustment in printing and processing for slight diierences between the coating weights of the two layers of ⁇ emulsion is far simpler than. is the adjustment of corresponding diierences in the case of the three emulsion material.
  • the choice of: the three. colour forming substances is of critical importance in a live-layer material, we find that wev can use any two colours in our negative material so long as they are widely separated from each other, or can be widely separated from each other by the use of a suitable printing lter;
  • the nished negative iilm is printed through a suitable iilter of greenish-yellow colour which converts the magenta colour of the one layer into a red colour and the blue-green colour of the other layer into agreen colour, in a single exposure on to a special positive material.
  • This positive material comprises a carrier or base coated successively with an orthochromatic layer of emulsion containing a blue-green colour forming substance and a red sensitive layer of emulsion containing a magenta colour forming substance.
  • rl ⁇ he exposed positive film is passed through a colour rectifier solution of aceto-acetanilide or acetacet 2,5 dichloroanilide, made up by dissolving 11/2 ozs. of the dye in 60 ozs. of alcohol, and thereafter the .lm is developed and processed in the same manner and in the same solutions as prescribed for the negative film.
  • the acetoacetanilide rectiiier may be mixed into the developing solution or, in the case of a two tank developingI procedure, it may be mixed into either the first or the second tank, depending upon the results desired in the nal print.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Silver Salt Photography Or Processing Solution Therefor (AREA)
US737992A 1947-02-17 1947-03-28 Color photography Expired - Lifetime US2568208A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB4514/47A GB682061A (en) 1947-02-17 1947-02-17 Improvements in colour photography
GB32148/47A GB691962A (en) 1947-02-17 1947-12-05 Improvements in colour photography

Publications (1)

Publication Number Publication Date
US2568208A true US2568208A (en) 1951-09-18

Family

ID=26239190

Family Applications (1)

Application Number Title Priority Date Filing Date
US737992A Expired - Lifetime US2568208A (en) 1947-02-17 1947-03-28 Color photography

Country Status (5)

Country Link
US (1) US2568208A (xx)
BE (1) BE480409A (xx)
DE (1) DE851720C (xx)
FR (1) FR961137A (xx)
GB (2) GB682061A (xx)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3152938A (en) * 1957-06-12 1964-10-13 Osifchin Nicholas Method of making printed circuits

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE623773A (xx) * 1962-03-15

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1174144A (en) * 1912-06-21 1916-03-07 Arturo Hernandez-Mejia Process of making color photographic transparencies.
US2016666A (en) * 1932-12-02 1935-10-08 Cinecolor Inc Colored photograph and method of making same
US2028279A (en) * 1931-12-03 1936-01-21 Gaspar Bela Photographic material
GB450877A (en) * 1935-01-31 1936-07-27 Harmonicolor Films Ltd Improvements in or relating to processes for the production of coloured picture films
US2151899A (en) * 1934-09-25 1939-03-28 Maurice Combes Process for the production of colored picture films
US2210905A (en) * 1935-12-06 1940-08-13 Gen Aniline & Film Corp Production of photographic multicolor pictures
US2251965A (en) * 1937-03-30 1941-08-12 Gevaert Photo Prod Nv Color photography and color photograph
US2268630A (en) * 1937-01-21 1942-01-06 Gen Aniline & Film Corp Color photography

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1174144A (en) * 1912-06-21 1916-03-07 Arturo Hernandez-Mejia Process of making color photographic transparencies.
US2028279A (en) * 1931-12-03 1936-01-21 Gaspar Bela Photographic material
US2016666A (en) * 1932-12-02 1935-10-08 Cinecolor Inc Colored photograph and method of making same
US2151899A (en) * 1934-09-25 1939-03-28 Maurice Combes Process for the production of colored picture films
GB450877A (en) * 1935-01-31 1936-07-27 Harmonicolor Films Ltd Improvements in or relating to processes for the production of coloured picture films
US2210905A (en) * 1935-12-06 1940-08-13 Gen Aniline & Film Corp Production of photographic multicolor pictures
US2268630A (en) * 1937-01-21 1942-01-06 Gen Aniline & Film Corp Color photography
US2251965A (en) * 1937-03-30 1941-08-12 Gevaert Photo Prod Nv Color photography and color photograph

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3152938A (en) * 1957-06-12 1964-10-13 Osifchin Nicholas Method of making printed circuits

Also Published As

Publication number Publication date
GB691962A (en) 1953-05-27
FR961137A (xx) 1950-05-05
DE851720C (de) 1952-10-06
BE480409A (xx)
GB682061A (en) 1952-11-05

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