US2697036A - Multilayer photographic film having improved resolving power - Google Patents

Multilayer photographic film having improved resolving power Download PDF

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Publication number
US2697036A
US2697036A US129012A US12901249A US2697036A US 2697036 A US2697036 A US 2697036A US 129012 A US129012 A US 129012A US 12901249 A US12901249 A US 12901249A US 2697036 A US2697036 A US 2697036A
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US
United States
Prior art keywords
layer
sensitive
emulsion
green
red
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
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US129012A
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English (en)
Inventor
George C Higgins
Nicholas H Groet
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Eastman Kodak Co
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Eastman Kodak Co
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Publication date
Application filed by Eastman Kodak Co filed Critical Eastman Kodak Co
Priority to US129012A priority Critical patent/US2697036A/en
Priority to FR1068614D priority patent/FR1068614A/fr
Priority to GB28535/50A priority patent/GB675936A/en
Application granted granted Critical
Publication of US2697036A publication Critical patent/US2697036A/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
    • 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
    • G03C2200/00—Details
    • G03C2200/25—Filter layer

Definitions

  • the red-sensitive emulsion layer is.
  • the green-sensitive emulsion layer and the bluesensitive emulsion layer It is customary to form a cyan dye image in the red-sensitive layer, a magenta dye image in the green-sensitive layer and a yellow dyeimage in the blue-sensitive layer. It is also known that a different sensitivity arrangement may be used in which either the red sensitive layer or the green-sensitive layer is coated outermost for the purpose of improving definition.
  • the light forming the image in the lower layers must first pass through an upper layer or layers.
  • the light forming the image in the red-sensitive layer must first pass through the bluesensitive top layer, the green-sensitive middle layer and any other layers which intervene. Since these top layers are optically turbid, they tend to impair the definition and therefore the quality of the image formed in the lower layer or layers. This is due to the light-scattering effect of the turbid upper layers and this, in turn, reduces the quality of the entire picture.
  • a further gbject is to provide a novel multi-layer photographic
  • the film used according to our invention consists of a suitable support such as cellulose ester, synthetic resin or paper, having on one side thereof suitable subbing layers and three superposed silver halide emulsion layers.
  • a suitable support such as cellulose ester, synthetic resin or paper
  • the red-sensitive silver halide emulsion layer is coated on the subbing layer and that is followed by the green-sensitive emulsion layer and the blue-sensitive emulsion layer.
  • a removable yellow coloring material is ordinarily contained in a layer between the blue-sensitive emulsion layer and the greensensitive emulsion layer, and other intermediate or overcoating layers may also be present.
  • This sensitivity arrangement may be altered by coating the red-sensitive emulsion layer or the green-sensitive emulsion layer outermost, especially where the film is designed as a print material.
  • the silver halide emulsion layers may contain couplers incorporated in any suitable way, for example, in the manner described in Jelley and Vittum U. S. Patent 2,322,027.
  • the cyanforming coupler will ordinarily be incorporated in the red-sensitive emulsion layer, the magenta-forming coupler in the green-sensitive emulsion layer and the yellowforming coupler in the blue-sensitive emulsion layer.
  • the film is to be used as a negative taking material colored couplers for masking purposes may be employed as described in Hanson U. S. Patent 2,449,966.
  • resolving power or definition or both are improved by incorporating in an upper emulsion layer of the film a material which may be a dye or pigment and which absorbs part of the light which a lower silver halide layer records but transmits light which the silver halide layers above the lower layer record.
  • a material which may be a dye or pigment and which absorbs part of the light which a lower silver halide layer records but transmits light which the silver halide layers above the lower layer record.
  • the blue-sensitive top layer may contain a magenta or reddish dye which absorbs part of the light which the green-sensitive layer records.
  • Either the blue-sensitive layer or the green-sensitive layer may contain a cyan or bluish dye which absorbs part of the light which the redsensitive layer records.
  • the dye or pigment incorporated in the emulsion layer inevitably produces a loss in speed of the layer below that in which it is incorporated.
  • the density of the absorber incorporated in any layer should be held to the minimum required to give the necessary improvement in image sharpness.
  • an optical density of 0.3 would be about the upper limit but in printing or duplicating films, an optical density of about 0.6 may be tolerated.
  • An optical density of 0.6 means that the dye or pigment absorbs of the light impinging on it in the spectral region of maximum absorption of the absorbing material.
  • the absorbing material which we employ should not absorb more than about A of the light which impinges on it in the spectral region of maximum absorption of the dye or pigment.
  • Coloring materials which we may employ are the aluminum lake of aurin tricarboxylic acid and Prussian Blue.
  • the aurin tricarboxylic acid is a magenta dye and is removed dnring processing by an alkali sulfite solution, for example, a developing solution.
  • Prussian Blue is a bluish pigment which is removed in an alkaline developing solution containing iron sequestering agents such as ethylene diamine tetra-acetic acid.
  • Example I Turnbulls Blue in gelatin was prepared by taking taneously a solution of 3.6 g. of ferrous ammonium sulfate in 36 cc. of water and a solution of 3.0 g. of potassium ferricyanide in 36 cc. of water. The solutions were run in slowly over a period of three minutes with continuous mechanical stirring. The dispersion was chilled until the gelatin was thoroughly set, then shredded and washed in running water for three hours to remove soluble by-products and excess potassium ferricyanide.
  • This disperson may be added to emulsion.
  • the color is bleached by the alkali of the developer; materials forming complexes with ferric iron, such as ethylenediamine tetra-acetic acid or sodium fluoride, may be added to the developer, to avoid the possibility of stain from the ferric hydroxide which is formed.
  • Example 2 The dispersion of the aluminum lake of aurin tricarboxylic acid was prepared as follows.
  • Example 3 Starting with the support, the successive layers for a: negative material are as follows: x
  • Thesecond coat is anemulsion layer. with silver. halide corresponding to 1.07 g. silver per sq. meter: This is sensitized to green with. Z-diphenyIaminQ-SJ-I(.3; ethylbenzothiazolylidene -ethylidene] 4-' 5) thiaz'olo'ne, approximately .15 g. per mole of silver halide, the amountdepending on grain size of the emulsion. It contains as a red light absorber Prussian Blue in.acolloidal dispersion at a concentration of 0.10 g, per sq. meter. As a magentacolor former, there is added 1-(pEp-tert.
  • butylphenoxylphenyl) 3 (inEp-toluenesulfonylaimi no]benzoylamino-S-pyrazolone, 550mg. per sq. meter, dissolved in four times its weight of dibutylphthalate.
  • the third coat is a dispersion .of-colloidal silver in gelatin, 100 mg. per sq. meter. v
  • the fourth coat is an unsensitized bromoiodide emulsion containing silver. halide corresponding; to. ,86 g. silver per sq. meter.
  • a dis persion of the aluminum lake of auri'n tricarboxylie. acid in gelatin .075 g. (calculated as freeacidtlper sq.- meter.- It contains a yellow color former, N(pbenzoylacetaminobenzenesulfonyl -N- Z-phenylpropyl -p-tert.- amylaniline, 1750 mg. per sq. meter, dissolved in four: times-its. weight of dibutylphthalate.
  • Fig. 1 10 is a support having thereon a red-sensitive silver halide emulsion layer 11, a green-sensitives'ilver halide emulsion layer 12, a yellow filter layer 13v and. a bluesensitive silver halide emulsion layer 14.
  • the blue-- sensitive layer 14 contains a magnetadyewhich absorbs 4 part of the green light which the layer 12 records and therefore reduces scattering of green-- light.
  • Fig. 2 illustrates a similar structure in which the greensensitive layer 15 and the blue-sensitive layer 16 contain a cyan dye which absorbs part of the light which the red-sensitive layer llrecords and therefore reduces scattering of red light.
  • the blue-sensitive layer 17 is adjacent thesupport,v the red-sensitive layer 18 is next and the green-sensitive layer 19 which contairisa cyan :dye or pigment is outermost.
  • the cyandye' or pigment in layer 19 reduces scattering of red light which records in layer 18 but does not affect the blue light which records in layer 17.
  • the. ma enter-dye or pigment absorbs part of thegreem lightbw'ich layer 20 records and thereby reduces scattering of green light.
  • a multi-layer photographic element capable of producing colored-images having improved definition, comprising a support having onone side thereof, silver halideemulsion layers separately sensitive, in order, to the red,: green, and blue spectral regions, said red-sensitive emulsion layer being adjacent said support and said green-sensitive emulsion layer containing Prussian Blue as a-Jred-light-absorbing material, said material absorbing not more than A of the red light impinging on it.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Silver Salt Photography Or Processing Solution Therefor (AREA)
  • Electrochromic Elements, Electrophoresis, Or Variable Reflection Or Absorption Elements (AREA)
US129012A 1949-11-23 1949-11-23 Multilayer photographic film having improved resolving power Expired - Lifetime US2697036A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
US129012A US2697036A (en) 1949-11-23 1949-11-23 Multilayer photographic film having improved resolving power
FR1068614D FR1068614A (fr) 1949-11-23 1950-11-21 Procédé pour accroître le pouvoir résolvant d'un produit photosensible et produit en résultant
GB28535/50A GB675936A (en) 1949-11-23 1950-11-22 New or improved multilayer light-sensitive photographic elements

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US129012A US2697036A (en) 1949-11-23 1949-11-23 Multilayer photographic film having improved resolving power

Publications (1)

Publication Number Publication Date
US2697036A true US2697036A (en) 1954-12-14

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US (1) US2697036A (fr)
FR (1) FR1068614A (fr)
GB (1) GB675936A (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3402046A (en) * 1963-09-23 1968-09-17 Eastman Kodak Co Multilayer color photographic elements
US3622318A (en) * 1970-03-20 1971-11-23 Eastman Kodak Co Photographic materials and processes
US4028103A (en) * 1976-04-12 1977-06-07 Eastman Kodak Company Processing compositions for color transfer processes comprising alkali metal fluorides and oxalates
US4157917A (en) * 1973-11-12 1979-06-12 Fuji Photo Film Co., Ltd. Color photographic light-sensitive material
US5328787A (en) * 1993-05-24 1994-07-12 Eastman Kodak Company Method for assessing and controlling the sensitometric characteristics of photographic products

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4746600A (en) * 1985-07-01 1988-05-24 Konishiroku Photo Industry Co., Ltd. Light-sensitive silver halide color photographic material with non-diffusable light-insensitive dye layer
ES2014297B3 (es) * 1986-07-08 1990-07-01 Agfa-Gevaert Nv Elemento fotografico colorante para proyeccion cinematografica.

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1306904A (en) * 1919-06-17 Cojgor bhotogbaphy
US2283361A (en) * 1938-03-10 1942-05-19 Chromogen Inc Color-photographic material
US2312543A (en) * 1938-07-12 1943-03-02 Chromogen Inc Photographic printing material and process for using the same
US2344084A (en) * 1936-10-02 1944-03-14 Chromogen Inc Light-sensitive material for color photographic purposes and method of using the same
US2428054A (en) * 1945-08-30 1947-09-30 Eastman Kodak Co Photographic color correction using colored couplers
US2449966A (en) * 1944-05-03 1948-09-21 Eastman Kodak Co Integral mask for color film
US2464798A (en) * 1944-05-03 1949-03-22 Gen Aniline & Film Corp Color correction of multicolor negative film by integral masking images

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1306904A (en) * 1919-06-17 Cojgor bhotogbaphy
US2344084A (en) * 1936-10-02 1944-03-14 Chromogen Inc Light-sensitive material for color photographic purposes and method of using the same
US2283361A (en) * 1938-03-10 1942-05-19 Chromogen Inc Color-photographic material
US2312543A (en) * 1938-07-12 1943-03-02 Chromogen Inc Photographic printing material and process for using the same
US2449966A (en) * 1944-05-03 1948-09-21 Eastman Kodak Co Integral mask for color film
US2464798A (en) * 1944-05-03 1949-03-22 Gen Aniline & Film Corp Color correction of multicolor negative film by integral masking images
US2428054A (en) * 1945-08-30 1947-09-30 Eastman Kodak Co Photographic color correction using colored couplers

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3402046A (en) * 1963-09-23 1968-09-17 Eastman Kodak Co Multilayer color photographic elements
US3622318A (en) * 1970-03-20 1971-11-23 Eastman Kodak Co Photographic materials and processes
US4157917A (en) * 1973-11-12 1979-06-12 Fuji Photo Film Co., Ltd. Color photographic light-sensitive material
US4028103A (en) * 1976-04-12 1977-06-07 Eastman Kodak Company Processing compositions for color transfer processes comprising alkali metal fluorides and oxalates
USRE29942E (en) * 1976-04-12 1979-03-20 Eastman Kodak Company Processing compositions for color transfer processes comprising alkali metal fluorides
US5328787A (en) * 1993-05-24 1994-07-12 Eastman Kodak Company Method for assessing and controlling the sensitometric characteristics of photographic products

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Publication number Publication date
FR1068614A (fr) 1954-06-29
GB675936A (en) 1952-07-16

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