US2376217A - Color photography - Google Patents

Color photography Download PDF

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Publication number
US2376217A
US2376217A US481988A US48198843A US2376217A US 2376217 A US2376217 A US 2376217A US 481988 A US481988 A US 481988A US 48198843 A US48198843 A US 48198843A US 2376217 A US2376217 A US 2376217A
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US
United States
Prior art keywords
layer
coupler
sensitive
emulsion
green
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
US481988A
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English (en)
Inventor
Lot S Wilder
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.)
Eastman Kodak Co
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Eastman Kodak Co
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
Priority to FR959734D priority Critical patent/FR959734A/fr
Application filed by Eastman Kodak Co filed Critical Eastman Kodak Co
Priority to US481988A priority patent/US2376217A/en
Application granted granted Critical
Publication of US2376217A publication Critical patent/US2376217A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • G03C7/3029—Materials characterised by a specific arrangement of layers, e.g. unit layers, or layers having a specific function

Definitions

  • FIG. 1 COLOR PHOTOGRAPHY Filed April s,' 1943 FIG. 1
  • Patented May is, 1945 UNITED STATE ooLon rno'rocnArnY Lot S. Wilder, Rochester, N. Y.,'i assignor to Eastman Kodak Company, Rochester, N. Y., a corporation oi New Jersey Application April s, 1943,
  • This invention relate to color photography and particularly to a multi-layer photographic Serial No. 481,988
  • a stilliurther object is to provide a method and means for imcoatings containing couplers. Other objects will appear from the iollowing' description of my invention.
  • Fig. 1 is a sectional view ot a fllm having sensitive layers not containing coupler coated layers'containing' con- -gi0ns, are coated in succession on a support.
  • three silver halide emulsion layers, sensitive respectively to the red, green and blue rered-sensitive emulsion layer preferably contains a nonfdifiusing coupler capable .of producing a blue-green layers, the green-sensitive emulsion.
  • the blue sensitive emulsion layer contains a non-diflusing coupler capable of producing aniagentadyeand the blue sensitive emulsion layercontains a non-dlfiusing coupler capable of producing a yellow dye.
  • a yellow filter layer is ordinarily coated between the bluesensitive emulsion layer and the green-sensitive emulsion layer.
  • the non-diffusing couplers incorporated in the sensitive emulsion layers in this way tend to decrease the sensitivity to light of suggested on page '12 of the emulsion layer, and, therefore; make it neces-.
  • the couplers might be incorporated in gelatin layers situated adjacent the corresponding silver halide layers.
  • the magenta coupler would be incorporated in a gelatin iayeradjacent the green-sensitive layer rather than incorporatedin the green-sensitive layer itself.
  • This I expedient overcomes the objectionable desensitizing, of theeinulsion, layer but has the disadvantagethat the definition of the resulting images layer. of the same or is poorer and the maximum density lower than when the coupler is incorporated in the sensitive layer -itself.
  • Fig. 2 is enlarged sectional view or a portion of 1.
  • a red-sensitive sillayer not containing coupler may be provided adjacent the red-sensitive emulsion layer containing the coupler producing the cyan dye.
  • the presence of coupler in an unsansitized layer causes less speed loss thanin an op-- ticall sensitized layer,'hence the need for an extra emulsionlayer adjacent'the blue-sensitive layer containing the coupler producing the yellow but such layercan.
  • the iilm also has a yellow filter layer ll between layers It and ll. 0! any suitable lightabsorbing material such as colloidal silver.
  • any known photographic silver halide emulsion oi' satisfactory speed and definition characteritlcs may be employed.
  • the green-sensitive and red-sensitive emulsionhyers may contain any suitable optical semitisingdyesand theemulsioniaycrsmaycontain any or the non-dimming couplers described in 8611111881 11-8. Patent 2,308,410.
  • a multi-layer photographic comprising a support having thereon-"fliree gelatinosilver halide emulsion layers sensitive -respecbecause 01' the coupler incorporatedin 75 tlvclmtothebluagreemandredspectralregions ing at least two silver halide'layers sensitive to different spectral regions, and containing cou-* and containing couplers, and contiguous to at least one of said emulsion layers sensitive to a wave-length longer than blue, a gelatino-silver halide emulsion layer free of coupler and having a spectral sensitivity substantially the same, 'and a speed at least as great, as that of the couplercontaining layer to which it is contiguous, said layer free of coupler being in contact with no layer of different spectral sensitivity containing coupler.
  • a multi-layer photographic material comprising a support having thereon three gelatinosilver halide emulsion layers sensitive, respectively, to the blue, green and red spectral regions and containing couplers contiguous to the greensensitive emulsion layer but not to the red-sensitive emulsion layer, a gelatino-silver' halide .emulsion layer sensitive to green light and free of coupler, and contiguous to the red-sensitive emulsion layer but not to the green-sensitive emulsion layer containing the coupler, a gelatino-silver halide emulsion layer sensitive to red light and tree of coupler, said layers tree of coupler having a speed as least as great as that o! the coupler-containing layer to which they are contiguous.
  • the method of increasing the dye densities in a multi-layer silver halide photographic material developed by color-forming development which comprises in a, multi-lwer material havplers, incorporating contiguous to at least one of of said layers, a layer of silver halide free 7 of coupler and sensitive to the same spectral region and having a speed at-least as great as the coupler-containing layer to which it is contiguous, said layer free of coupler being in 'contact with no layer of different spectral sensitivity containing coupler, exposing and developing said material in-a color-forming developer whose development products difluse to some extent from the non-coupler-containing layer into the coupler-containing layer to strengthen the dye image in said last mentioned layer.
  • a multi-layer photographic material com-- prising a support having thereon three gelatinosilver halide emulsion layers sensitive, respectively, o the blue, green, and red spectral regions and co taining couplers, a yellow filter layer be;

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Silver Salt Photography Or Processing Solution Therefor (AREA)
US481988A 1943-04-06 1943-04-06 Color photography Expired - Lifetime US2376217A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
FR959734D FR959734A (es) 1943-04-06
US481988A US2376217A (en) 1943-04-06 1943-04-06 Color photography

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US481988A US2376217A (en) 1943-04-06 1943-04-06 Color photography

Publications (1)

Publication Number Publication Date
US2376217A true US2376217A (en) 1945-05-15

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US481988A Expired - Lifetime US2376217A (en) 1943-04-06 1943-04-06 Color photography

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FR (1) FR959734A (es)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3450536A (en) * 1961-03-24 1969-06-17 Eg & G Inc Silver halide photographic film having increased exposure-response characteristics
US3658536A (en) * 1970-07-13 1972-04-25 Wilfred L Wolf Multilayered color film of increased sharpness
US3960558A (en) * 1974-04-29 1976-06-01 Polaroid Corporation Dye free, spectrally sensitive silver halide layers in diffusion transfer films
US4003744A (en) * 1972-12-07 1977-01-18 Polaroid Corporation Photographic products with photosensitive layers of same spectral sensitivity and different speed
US4046566A (en) * 1974-10-28 1977-09-06 Ciba-Geigy Ag Process for the production of masked positive color images by the silver dye bleach process using silver complex diffusion
US4388401A (en) * 1980-12-29 1983-06-14 Fuji Photo Film Co., Ltd. Multilayer color reversal light-sensitive material
US6159672A (en) * 1992-04-16 2000-12-12 Eastman Kodak Company Photographic material having a blue sensitive coupler starved unit

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4123601A1 (de) * 1991-05-16 1992-11-19 Agfa Gevaert Ag Farbfotografisches aufzeichnungsmaterial
JPH0619077A (ja) * 1992-04-16 1994-01-28 Eastman Kodak Co 多層カラー写真要素
DE69320248T2 (de) * 1992-05-20 1999-03-25 Eastman Kodak Co., Rochester, N.Y. Photographisches Material mit aneinander grenzenden rotempfindlichen Schichten
EP0583020B1 (en) * 1992-05-20 1998-08-12 Eastman Kodak Company Photographic material with improved granularity

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3450536A (en) * 1961-03-24 1969-06-17 Eg & G Inc Silver halide photographic film having increased exposure-response characteristics
US3663228A (en) * 1961-03-24 1972-05-16 Applied Photo Sciences Color photographic film having extended exposure-response characteristics
US3658536A (en) * 1970-07-13 1972-04-25 Wilfred L Wolf Multilayered color film of increased sharpness
US4003744A (en) * 1972-12-07 1977-01-18 Polaroid Corporation Photographic products with photosensitive layers of same spectral sensitivity and different speed
US3960558A (en) * 1974-04-29 1976-06-01 Polaroid Corporation Dye free, spectrally sensitive silver halide layers in diffusion transfer films
US4046566A (en) * 1974-10-28 1977-09-06 Ciba-Geigy Ag Process for the production of masked positive color images by the silver dye bleach process using silver complex diffusion
US4388401A (en) * 1980-12-29 1983-06-14 Fuji Photo Film Co., Ltd. Multilayer color reversal light-sensitive material
US6159672A (en) * 1992-04-16 2000-12-12 Eastman Kodak Company Photographic material having a blue sensitive coupler starved unit

Also Published As

Publication number Publication date
FR959734A (es) 1950-04-04

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