US2561299A - Color cinematography - Google Patents

Color cinematography Download PDF

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Publication number
US2561299A
US2561299A US652810A US65281046A US2561299A US 2561299 A US2561299 A US 2561299A US 652810 A US652810 A US 652810A US 65281046 A US65281046 A US 65281046A US 2561299 A US2561299 A US 2561299A
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United States
Prior art keywords
colour
layer
red
blue
images
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Expired - Lifetime
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US652810A
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English (en)
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Fraunhofer Hans Von
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    • 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
    • G03C7/22—Subtractive cinematographic processes; Materials therefor; Preparing or processing such materials

Definitions

  • My invention concerns .a new process for ma-. terially simplifying colour motion picture proce-. dure, from the making of the required colour separation negatives to the printing of the positives, and, in accordancevwith the invention. I combine the best'features of the additive and sub.':-.-
  • the invention may be said toconsist in a process -f0.r the production of; colour motion pictures. wherein different frames of a negative-film comprising two superimposed layers of emulsion areexposed throughdifferent colour filters in such manner as to effect a three-; colour analysis the two seriesof negative images are developed, difierentially coloured and printed simultaneously on to two differently sensitised layers of. emulsion .comprised ina positive film,
  • the .process I may employ .a two-layer monopackor bipack film consisting .of an. orthochromatic and a panchromatic emulsion.
  • the integralmonopack. negative is formed by, disposing. on. to the ,celluloid. .carrier a. yellow dyed orthochromaticl emulsion. containing, a. dye, forming; substance of suitable. ,type andcha act'er, as. .for. instance .p-nitrophenylacetonitrile',
  • red-filter a suitable minus green and blue dye, known to the art as a red-filter.
  • This red-filter dye may be employed in a solution with gelatine or other suitable transparent material.
  • red sensitive emulsion containing a dye forming substance of a suitable type and character, as for instance acetoacet 2,5 dichloroanilide.
  • the required slight variation of the silver deposit in one frame and layer from that in the next frame and layer to obtain the additive effect desired may be achieved by passing the film through a suitable machine which sprays, wipes, coats or otherwise deposits upon the Celluloid carrier a thin layer of suitable minus'blue filterdyes upon the odd frames of the film.
  • suitable minus'blue filterdyes are tartrazine, rapid filter yellow.
  • a deposit of minus green filter-dye such as Rose bengal, rhodamine, is applied.
  • monopack negatives formed in the above described manner must be exposed through the carrier, but by reversing the order and disposition of the two layers so that the emulsion containin the red sensitizer is nearest to the carrier and the blue-green emulsion furthest away from the carrier, exposure may be made in the usual manner with the emulsion facing the lens.
  • the negative After exposure, the negative is developed in any suitable normal black and white developer and is then fixed and thoroughly Washed. Thereafter the negative is bleached in a suitable bleach for dye coupling by redevelopment.
  • a suitable bleach for dye coupling may be a mixture of one ounce (300 grams) of potassium ferricyanide, half an ounce (15.0 grams) of potassium bromide, and tap water to make 32 ounces (1 litre) of solution.
  • the negative is bleached completely in this solution, then washed thoroughly and re-developed in a suitable coupling developer which may be composed as follows:
  • the choice of the dye forming substance may be varied to obtain any suitable combination of colours for each of the two layers of images representing the blue-green and red colour records respectively.
  • the two layers may be converted into colour by dye-mordanting, chemical toning or any other suitable process of which many are known to the art.
  • the primary purpose of converting the two series of images, incorporated in the two layers of emulsion of the negative, is to reduce the 4 printing of the positive into a single operation and thus to assure perfect registration of the two images and, therefore, to materially shorten the time of production.
  • My preferred method for making up of the required positive film is the following:
  • a layer of orthochromatic emulsion containing an orange-red dye forming substance such as' for instance a' suitable combination of o chloroacetoacetanilide and p nitrophenylacetonitrile in the proportion of one-third and two-thirds respectively, is disposed upon the Celluloid carrier.
  • a yellow dyed blue sensitive emulsion containing a blue-green dye forming substance such as for instance 2,4 dichloro-l-naphtol is coated over the lower layer of the positive film.
  • the negative film described hereinbefore is then printed in the usual black and white fashion by contact or optically, on to this special positive film after which the positive film receives substantially the same processing as that specified for the negative film.
  • the blue-green colour record of the negative will contain differential silver deposits in alternate frames of the positive and, in the other layer of the positive the red colour record printed from the negative will have a uniform deposit in all frames.
  • a process for the production of colour motion pictures which give the effect of a threecolour analysis by means of a combination of additive and subtractive principles, said process comprising producing in a first layer of a twolayer negative film having a first light-sensitive emulsion layer of at least red sensitivity and a second light-sensitive emulsion layer of only orthochromatic sensitivity a series a consecutive frames each recording uniform density images only of red colour values of a photographed subject, producing in said orthochromatic emulsion second layer of said two layer negative film a first series of alternate frames recording images from said subject only of blue-green colour values of minus blue density and a second series of frames alternating with said first series recording images from said subject only of bluegreen colour values of minus green density, converting the images in the frames of the series of the first layer to greenish-yellow, converting the images in both series of the second layer to magenta, printing in a single operation by means of exposure through both layers of the thus coloured two-layer negative film both layers of a two-layer positive film having an

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Silver Salt Photography Or Processing Solution Therefor (AREA)
  • Compositions Of Macromolecular Compounds (AREA)
US652810A 1945-07-23 1946-03-07 Color cinematography Expired - Lifetime US2561299A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB271385X 1945-07-23

Publications (1)

Publication Number Publication Date
US2561299A true US2561299A (en) 1951-07-17

Family

ID=10254836

Family Applications (1)

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US652810A Expired - Lifetime US2561299A (en) 1945-07-23 1946-03-07 Color cinematography

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US (1) US2561299A (en(2012))
BE (1) BE466319A (en(2012))
CH (1) CH271385A (en(2012))
DE (1) DE824886C (en(2012))
FR (1) FR929724A (en(2012))

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1278162A (en) * 1917-02-08 1918-09-10 Prizma Inc Subtractive and additive color photography.
US1954452A (en) * 1930-03-19 1934-04-10 Leopold D Mannes Method of making color photographs
US1966653A (en) * 1931-03-03 1934-07-17 Thornton John Edward Color cinematography and other photography and means, method, and apparatus therefor
US1969469A (en) * 1932-07-30 1934-08-07 Leopold D Mannes Photographic color process
US2001250A (en) * 1931-04-15 1935-05-14 Agfa Ansco Corp Process of producing cinematographic three- and multi-color pictures
US2059884A (en) * 1932-09-21 1936-11-03 Eastman Kodak Co Color photography

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1278162A (en) * 1917-02-08 1918-09-10 Prizma Inc Subtractive and additive color photography.
US1954452A (en) * 1930-03-19 1934-04-10 Leopold D Mannes Method of making color photographs
US1966653A (en) * 1931-03-03 1934-07-17 Thornton John Edward Color cinematography and other photography and means, method, and apparatus therefor
US2001250A (en) * 1931-04-15 1935-05-14 Agfa Ansco Corp Process of producing cinematographic three- and multi-color pictures
US1969469A (en) * 1932-07-30 1934-08-07 Leopold D Mannes Photographic color process
US2059884A (en) * 1932-09-21 1936-11-03 Eastman Kodak Co Color photography

Also Published As

Publication number Publication date
BE466319A (en(2012))
CH271385A (fr) 1950-10-31
DE824886C (de) 1951-12-13
FR929724A (fr) 1948-01-06

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