US1996928A - Sensitized photographic element and process of making same - Google Patents

Sensitized photographic element and process of making same Download PDF

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Publication number
US1996928A
US1996928A US437266A US43726630A US1996928A US 1996928 A US1996928 A US 1996928A US 437266 A US437266 A US 437266A US 43726630 A US43726630 A US 43726630A US 1996928 A US1996928 A US 1996928A
Authority
US
United States
Prior art keywords
color
silver
silver halide
former
photographic element
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
US437266A
Other languages
English (en)
Inventor
Leopold D Mannes
Jr Leopold Godowsky
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.)
Individual
Original Assignee
Individual
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 BE376781D priority Critical patent/BE376781A/xx
Application filed by Individual filed Critical Individual
Priority to US437266A priority patent/US1996928A/en
Priority to GB1552/31A priority patent/GB376794A/en
Priority to FR709706D priority patent/FR709706A/fr
Application granted granted Critical
Publication of US1996928A publication Critical patent/US1996928A/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
    • G03C7/388—Processes for the incorporation in the emulsion of substances liberating photographically active agents or colour-coupling substances; Solvents therefor
    • 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
    • G03C7/26—Silver halide emulsions for subtractive colour processes

Definitions

  • the invention may be employed for the production of pictures in natural color byusing two colors corresponding to the two colors of a twocolor process or by using three colors corresponding to the three colors of a three-color process. Also' four or more different colors may be employed but ordinarily three colors are the maximum number required.
  • Fig. l shows diagrammatically the silver halide emuisined.
  • Fig. 2 shows the colored emulsion prior to exposure.
  • Fig. 3 shows the exposed plate or iilm.
  • Fig. 4 shows the developed plate or nlm
  • Fig. 5 shows the completed product with the silver removed.
  • the invention may also be employed for the production of pictures in a single color, that is to sayyinstead of coloring the silver .image by toning or dyeing, there may be produced by the invention a colored picture wherein the image is formed of an insoluble colored vcompound suspended in the colloidal compound forming the body of the emulsion.
  • the invention is based on the fact that light-sensitive silver halides may be formed by precipitating them in the presence of certain organic compounds such as alpha naphthol or paranitrobenzylcyanide, these latter compounds being absorbed by or adsorbed to the silver-halide crystal or grains thus formed. When these grains, distributedin an ordinary emulsion,v
  • This process is to be distinguished from previously described processes in which the color-forming compound is merely dispersed, among the silver halide grains suspended in the colloid; the
  • silver halide grains in this case here disclosed adsorbing or absorbing the color-'forming compound in question instead of allowing it to permeate the colloid indiscriminately.
  • This process is to be further distinguishedfrom others previously attempted in which highly colored compounds were precipitated in combination with the silver halide.
  • An emulsionthus formed would be sufficiently absorptive to llight of certain colors, to prohibit normal penetration of incident 10 lightnecessary to correct exposure.
  • These colorforming compounds here referred to are all sub- 'stantially colorless, especially in the minute quantlties'employed for this purpose, thus not materially affecting the normal color of an emulsion. 15
  • the silver may beremoved p with potassium-cyanide, for instance, leaving a pure colored image.
  • potassium-cyanide for instance, potassium-cyanide
  • Potassium ferricyanide and hypo may be used instead of potassium cyanide.
  • a single emulsion is employed containing 20 grains of silver halide with a single absorbed or adsorbed color-former, there will be produced by the procedure described a picture in the color desired, depending on, the particular colorformer employed in the manufacture of the iilm. 25
  • the selection of the desired color is made by selecting the particular nlm to be'exposed.
  • the color of the resulting 30 picture will be designated on-the film package and the user has merely to select the lm for the desired color and follow the ordinary procedure of development as above described.
  • the invention may ⁇ be employed in color pho- 35 tography in several diierent ways.
  • a third layer maybe coated for tri-color recording consisting of an ordinary blue-sensitized (i. e. not especially sensitized) layer containing yellow illter dye, the grains of this layer containing a yellow color-former such as ethyl-acetoacetate. This compound will in such an instance be left out of the green-sensitive layer.
  • a third emulsion may be mixed together with the two described above.
  • Similar positives may be produced by printing- ⁇ from the negatives on positive illm of the same character, with the emulsions either admixed or in separate layers, and thereafter following the same ⁇ procedure of development, etc.
  • color-former refers to organic compounds acting as couplers in connection with certain developers in photographic processes, thus forming colored compounds, usually insoluble in water, in the presence of the iinely divided silver being reduced by the de- 'Ihis,.in general, distinguishes them from leuca-bases and rather classiiies them as intermediate couplers in a dye-forming process.
  • Phenols, naphthols, cresols, nitrophenylacetonitriles, ethyl acetoacetate, and their halogenated or sulphonic acid compounds are typical members of this type of color-former.
  • Paraphenylenediamines and paramidophenols are typical developers used in conjunction with the color-formers.
  • the colored compounds so formed belong to the class, for instance, of ndophenols, indoanilines, and indamines.
  • a light-sensitive photographic emulsion comprising a colloidal carrier containing silver halide grains, certain of said grains carrying an y absorbed or adsorbed substance adapted when subjected to the action ot a developer to produce a substantially transparent insoluble compound of a color not theretofore present in said substance suspended in a colloidal carrier.
  • a light-sensitive photographic element which consists of a support, an emulsion thereon, said emulsion containing a plurality of different light-sensitive substances, each substance comprising a silver halide with an absorbed or adsorbed color-former, the color-formers of the different light-sensitive substances being adapted to produce different colors.
  • a silver halide grain or crystal with an absorbed or adsorbed color-forming compound 6.
  • a light-sensitive grain or crystal contain-- ing silver, with a color-forming compound bound thereto by physical or chemical union.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Silver Salt Photography Or Processing Solution Therefor (AREA)
US437266A 1930-03-19 1930-03-19 Sensitized photographic element and process of making same Expired - Lifetime US1996928A (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
BE376781D BE376781A (en(2012)) 1930-03-19
US437266A US1996928A (en) 1930-03-19 1930-03-19 Sensitized photographic element and process of making same
GB1552/31A GB376794A (en) 1930-03-19 1931-01-16 Process for colour photography
FR709706D FR709706A (fr) 1930-03-19 1931-01-20 Procédé de photographie en couleurs

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US437266A US1996928A (en) 1930-03-19 1930-03-19 Sensitized photographic element and process of making same

Publications (1)

Publication Number Publication Date
US1996928A true US1996928A (en) 1935-04-09

Family

ID=23735738

Family Applications (1)

Application Number Title Priority Date Filing Date
US437266A Expired - Lifetime US1996928A (en) 1930-03-19 1930-03-19 Sensitized photographic element and process of making same

Country Status (4)

Country Link
US (1) US1996928A (en(2012))
BE (1) BE376781A (en(2012))
FR (1) FR709706A (en(2012))
GB (1) GB376794A (en(2012))

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2456954A (en) * 1947-08-01 1948-12-21 Eastman Kodak Co Photographic reversal processes
US2705200A (en) * 1950-11-15 1955-03-29 Gen Aniline & Film Corp Bipack color film containing nondiffusing color formers and processing thereof
US2735766A (en) * 1952-05-15 1956-02-21 Prevention of dye wandering in
US2940847A (en) * 1957-07-03 1960-06-14 None i red
US5362616A (en) * 1991-12-19 1994-11-08 Eastman Kodak Company Chromogenic black-and-white photographic imaging systems
US5364747A (en) * 1992-11-25 1994-11-15 Eastman Kodak Company Color correcting layers consisting essentially of at least one dye-forming coupler and gelatin in chromogenic black-and-white photographic imaging systems

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE414508A (en(2012)) * 1935-04-10
BE419447A (en(2012)) * 1936-01-18
DE743341C (de) * 1936-01-18 1943-12-23 Ig Farbenindustrie Ag Verfahren zur Herstellung photographischer Bilder
DE750122C (de) * 1936-05-29 1944-12-14 Verfahren zur Sensibilisierung von mehrschichtigem photographischem Material fuer Farbaufnahmen

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2456954A (en) * 1947-08-01 1948-12-21 Eastman Kodak Co Photographic reversal processes
US2705200A (en) * 1950-11-15 1955-03-29 Gen Aniline & Film Corp Bipack color film containing nondiffusing color formers and processing thereof
US2735766A (en) * 1952-05-15 1956-02-21 Prevention of dye wandering in
US2940847A (en) * 1957-07-03 1960-06-14 None i red
US5362616A (en) * 1991-12-19 1994-11-08 Eastman Kodak Company Chromogenic black-and-white photographic imaging systems
US5364747A (en) * 1992-11-25 1994-11-15 Eastman Kodak Company Color correcting layers consisting essentially of at least one dye-forming coupler and gelatin in chromogenic black-and-white photographic imaging systems

Also Published As

Publication number Publication date
FR709706A (fr) 1931-08-12
GB376794A (en) 1932-07-18
BE376781A (en(2012))

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