US2393027A - Multilayer reversal color film and a method of processing the same - Google Patents

Multilayer reversal color film and a method of processing the same Download PDF

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Publication number
US2393027A
US2393027A US464715A US46471542A US2393027A US 2393027 A US2393027 A US 2393027A US 464715 A US464715 A US 464715A US 46471542 A US46471542 A US 46471542A US 2393027 A US2393027 A US 2393027A
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United States
Prior art keywords
color
layer
sensitive
red
layers
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US464715A
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English (en)
Inventor
Herman H Duerr
Jr Herbert W Morreall
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GAF Chemicals Corp
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General Aniline and Film Corp
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Priority to BE475680D priority Critical patent/BE475680A/xx
Application filed by General Aniline and Film Corp filed Critical General Aniline and Film Corp
Priority to US464715A priority patent/US2393027A/en
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Publication of US2393027A publication Critical patent/US2393027A/en
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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
    • G03C7/30—Colour processes using colour-coupling substances; Materials therefor; Preparing or processing such materials

Definitions

  • the present invention relates to multilayer reversal colorlmhaving a high speed and iine grain, amenable to control of the color balance and to a method of processing the same.
  • Multilayer colorlm is known in which the three layers sensitive respectivelyV to red, green and blue light, contain color formers which are take care of irregularities which may be inherent i fast to diffusion.
  • A method of processing such iilm by the reversal method involving the forma,
  • the cyan image is the key image in subtractiveM color photography and it is therefore essential that the layer destined to contain such image be amenable to processing to produce a 'strong' image. ⁇
  • This inturn means that the iilm must dye images inthe single developing step, and precludes a, possibility of adjusting the reaction to particularly in the red-sensitive layer. inasmuch as it is dimcult to obtain an absolute uniformity in all of the layers so that the reaction producing 'the dye image leads to images having a proper color balance, a further problem is presented by the fact thatwhere the color formers are located in the iilm itself, compensation for irregularities cannot be effected by adjusting the time of development.
  • reference numeral l discloses an antihaiation layer removable in an alkaline solution or decolorizable in the developing process.
  • a suitawble antihalation layer in the first category consists of an alkali-soluble resin such as is described in U. S. P. 2,161,788 and contain# ing dyessuch as are mentioned in U. S. P. 2,147,112.
  • An antihalationlayer falling within the second category is a colloidal ⁇ silver layer ,'such as that described in U. S. P. 2,220,187. ,6
  • Layer 5 is a red-sensitive silver halide llayer which contains no color component. Due to the absence of the color component, ne may use any of the tizers and the color formers it.' not the only problem which confronts the art when working according to said patented procedure. In the patented procedure, all ci the dye imagesare promown powerful sensitizers for red without any fear of a detrimentalaction on'the sensiti Service.
  • Layer 3 is a green-sensitive silver halide emulsion .layer vcontaining a non-diffusing magenta color component.
  • Satisfactory color components for the magenta image are'the non-diusing components described inv U. SQPatents 2,178,612 and 2,179,238.
  • Examples of such components are the condensation products of meta-amino-phenylmethyl-pyrasolone, and the mixed polymer o;
  • Layer l is a blue-sensitive silver halide emulsion layer containing a non-diiiusing yellow color component:
  • terephthaloyl-bis-acetic acid ani1idp'carboxylic acid and the like are terephthaloyl-bis-acetic acid ani1idp'carboxylic acid and the like.
  • a yellow lter layer which may be ot colloidal silver or which may be of a yellow dyestuif of the type contemplated in U. S. P. 2,187,731.
  • a third gelatin layer which may, however, lbe omitted without any particular sacrifice of resuits.
  • the multilayer film may be processed by exposing the same to a colored object and developing the film to a negative in a developer which will not couple with the Acomponents in the blueand green-sensitive layers.
  • a developer which will not couple with the Acomponents in the blueand green-sensitive layers.
  • one may utilize the amidol developer described in U. S. P. 2,179,234.
  • the red-sensitive bottom layer is then exposed throughthe base to red light without affecting the green-sensitive and bluesensitive layers.
  • the re-exposed red-sensitive layer is then color-developedQin a developer containing a cyan colr component which oi course must be one which is diffusing rather than nondiifusing.
  • the blue-sensitive top layer and green-sensitive middle layers are simultaneously exposed to bluegreen light and developed in a color-.forming developer which is free from color-forming substances.
  • Developers of this type are paraphenylenediamine developers, and we have found that, satisfactory results may be obtained when using the developer mentioned in U. S. P. 2,179,234.
  • a yellow image is formed in the blues sensitive top layer and al magenta image in the green-sensitive middle layer.
  • the multilayer tllm is now subjected anide' bleaching bath t0 ⁇ eifect a removalv of both the positive and negative silver, after which itis ilxed, washed and dried. Suitable silver-bleaching baths are those referred to in U. S.
  • silver bleaching baths- which we have found to be particularly effective are the followto bleaching in a ferricy' -aseaoev Potassium ferrlcyanlde gms Water to--- or' 1000 or l Cupric chloride gms-- 20 Potassium bromidegms '10 Water to cc-; 1000 Ammonium bromide gms 75 Iodine (cryst.) gms-- 3 Water to cc 1000 A xing bath; ofA 10% sodium thiosulilte may be used. The film is now ready for projection.
  • ging agents are those disclosed in U. S. P.
  • the two top layers may be simultaneously fogged by exposure with minus red, light and then color developed while the red-sensitive bottom layer' may be chemically fogged and then color developed lwith a 'developer containing a Suitable chemical fog- 2,159,466.
  • An example of a fogging agent which we have found to give particularly goodvresults is:
  • l,One may utilize, in place of the thiosinamne in this example, n-phenyl thiourea, N-N diethyl-N'- allyl thiourea,- N-N diethano-N'phenylthlourea and the like. f'
  • the illm of this ilgure is processed'by exposing it to a colored object and developing it to a blackand-white negativein a developer such as amidol,
  • red-sensitive layer is then developed in a color developer containing a cyan color-coupling component oi the type described above.
  • color balance can be assured by correlating the time of exposure with the time of development.
  • 'I'he blue-sensitive top layer and the green-sensitive intermediate layer are now exposed with white light and developed in a color-forming developer free from color-forming sutances.
  • the developer mentioned above may also be employecl in this instance.
  • the illm is bleached with a silver bleaching bath of the type recommended above and after xlng is Washed and dried. The iilm is then ready for projection and it will be found to have a proper color balance.
  • any red sensitizer suitable for the sensi- 1 tizing of a silver halide emulsion to the red region of the spectrum may he utilized, inasmuch as no color formers are present in the red-sensitive layer and hence one may disregard the fact that cyan color formers normally have a greater ailinity for silver halide grains than do red sensitizers.
  • the number of possible color formers which the art may select is greatly enhanced, since one need not pay any particular attention to the necessity pf incorporating groups into the color former which would render the same fast to diffusion.
  • the time of development may be so correlated with the other factors as to insure a proper color balance between the various dye nnages.
  • the method of producing multicolor photographs which comprises -exposing a multilayer 111m comprising a base, a red-sensitive layer on said base free from color-forming components, a green-sensitive layer above said red-sensitive layer, containing a nondiiusing color component for color forming development for the magenta' image, a blue-sensitive outer layer containing a non-diffusing color component'for color forming development for the yellow image, and a yellow lter interposed between the blue-sensitive and green-sensitive layers, developing the film to a black-and-white negative in a developer whose oxidation products do not couple with the color formers in the emulsion layers, rendering developable the silver halide oi' 'one of the groups of layers comprising the blue-sensitive and greensensitive layers on the one hand and Ithe redsensitive layer on the other hand and without rendering developable the silver halide of the other group, color developing the silver halide so rendered developable, rendering the previously untreated silver halide developable and color developing the same, the
  • a 3 The method of producing multicolor photographs which comprises exposing a multilayer film comprising a base, a red-sensitive layer on y said base free from color forming components,
  • a.greensensitive layer above said red-sensitive layer containing a nondifiusing color compogreen-sensitive layers, developing the film to a' blaclr-and-white negative in a developer whose oxidation products do not couple with the color iormers in the emulsion layers, re-exposing the silver halide of the blue-sensitive and greensensitive layers without exposing the silver halide of the red-sensitive layer, color developing the exposed silver halide, rendering the previously unexposed silver halide in the red-sensitive layer developable, and developing the same in a color developer containing. a cyan color component.
  • -green-sensitive emulsion layer containing a nongreen-sensitive layer
  • a blue-sensitive emulsion layer containing a nondiiusing color component for color forming development for the yellow image on said second yellow iilter layer, which comprises exposing said nlm to a colored object.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Silver Salt Photography Or Processing Solution Therefor (AREA)
US464715A 1942-11-06 1942-11-06 Multilayer reversal color film and a method of processing the same Expired - Lifetime US2393027A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
BE475680D BE475680A (enrdf_load_stackoverflow) 1942-11-06
US464715A US2393027A (en) 1942-11-06 1942-11-06 Multilayer reversal color film and a method of processing the same

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US464715A US2393027A (en) 1942-11-06 1942-11-06 Multilayer reversal color film and a method of processing the same

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2500045A (en) * 1948-05-29 1950-03-07 Eastman Kodak Co Dianil dye photographic filter layer
US2708625A (en) * 1951-01-19 1955-05-17 Gen Aniline & Film Corp Photographic element for the production of subtractive color images by sulfonhydrazide color development
US2768894A (en) * 1954-04-30 1956-10-30 Gen Aniline & Film Corp Photographic element with emulsion layer containing color former and wetting agent
US2992100A (en) * 1957-02-18 1961-07-11 Keay Harold C Grant Method of separating colour emulsion from acetate back colour transparencies
US3240598A (en) * 1961-11-30 1966-03-15 Gen Aniline & Film Corp Removal of measle spots in paper base reversal print material

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2500045A (en) * 1948-05-29 1950-03-07 Eastman Kodak Co Dianil dye photographic filter layer
US2708625A (en) * 1951-01-19 1955-05-17 Gen Aniline & Film Corp Photographic element for the production of subtractive color images by sulfonhydrazide color development
US2768894A (en) * 1954-04-30 1956-10-30 Gen Aniline & Film Corp Photographic element with emulsion layer containing color former and wetting agent
US2992100A (en) * 1957-02-18 1961-07-11 Keay Harold C Grant Method of separating colour emulsion from acetate back colour transparencies
US3240598A (en) * 1961-11-30 1966-03-15 Gen Aniline & Film Corp Removal of measle spots in paper base reversal print material

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