US1996928A - Sensitized photographic element and process of making same - Google Patents
Sensitized photographic element and process of making same Download PDFInfo
- 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
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Classifications
-
- 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.
Description
Patented Apr. 9, 1935 UNITED' STATES PATENT OFFICE SENSITIZED PHOTOGRAPHIC ELEMENT AND PROCESS F MAKING SAME Leopold D. Mannes and Leopold Godowsky, Jr.,
New York, N. Y.
Applieation March is, 1930, serial No. 437,266
14 Claims.
vide a photographic element by means of which a photographic image in color may be obtained by a direct and single development.
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.
The invention is illustrated in the. accompanying drawing in which:
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; and
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
that is, suspended in a colloidal medium, are exposed in the course of the customary photographic process and developed by such ,a developer as diethyl paraphenylenediamine hydrochloride, there is formed in situ with the reduced silver image and by the local oxidation reaction of-the development a substantially insoluble colored compound which will remain suspended in whatever colloidal medium holds the halide grain. The
silver image itself furthers the reaction appar` ently by catalysis.
This process is to be distinguished from previously described processes in whichthe 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
After development, the silver may beremoved p with potassium-cyanide, for instance, leaving a pure colored image. Potassium ferricyanide and hypo may be used instead of potassium cyanide.
1f 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 Thus with the same developer and the same procedure of development a variety of diierent color effects may be obtained. 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 inventionmay` be employed in color pho- 35 tography in several diierent ways.
We preferably intermix a plurality of diierently color-sensitized emulsions containing respectively different color-formers and applythe mixture in a single layer to the support. A sin- 40 gle exposure followed by a single development of such a lm will cause each color record to be developed to a correspondingly different color.
For a two-color process a red-sensitive emulsion containing a silver halide precipitated with 45 trichlornaphthol or related compound and a bluegreen sensitive emulsion containing a silver halide precipitated with a nitrobenzylcyanide compound mixed with, say, ethyl acetoacetate,
are intermixed and spread on the iilm or other 50 support in a single layer. The nlm is exposed in the usual manner and developed with a developer such as diethyl paraphenylenediamine hydrochloride. Both images are thus simultaneously developed, and also there are simultanel Y veloping agent.
ouslyformed two color images corresponding to the silver images. ,The silver images are thereafter dissolved out leaving clear colored images.
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. In the case of emulsionmixtures such a third emulsion may be mixed together with the two described above.
Instead of mixing the emulsions they ma;r be
applied in separate layers, preferably with -the red-sensitive layer next the illm. No change need be made in the exposure, development and subsequent treatment of the film. 'Ihe two images will be simultaneously formed 'as before.
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.
The term color-former here used 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.
We claim: f
1. 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.
4. The method of making a light-sensitive photographic element which consists in precipitating a silver halide in the presence of an organic color-forming compound, and thereafter distributing said precipitate in a suitable emulsion or other colloidal medium.
5. 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.
6. A silver halide grain or crystal with an absorbed or adsorbed color-forming compound.
'7. The method of producing a silver halide grain or crystal with an absorbed or adsorbed color-former, which consists in precipitating the' silver halide in the presence oi' a color-formen* 8. The method of producing a silver halide grainor crystal with an absorbed or adsorbed color-former, which consists in ripening the silver halide in the presence of a color-former.
9. A silver halide grain or crystal with an absorbed or adsorbed color-forming compound, saidV halide being also sensitized to record a particular color or set of colors.
10. The method of producing a silver halide grainor crystal with an absorbed or adsorbed color-former, which consists in precipitating the silver halide in the presence of a color-former and subjecting it to the action of a colorsensitizer.
l1. A light-sensitive grain or crystal contain-- ing silver, with a color-forming compound bound thereto by physical or chemical union.
12. The method of producing the grain or crystal of the foregoing claim which consists in precipitating the light-sensitive silver compound in the presence of a color-former.
13. A light-sensitive grain or crystal containing silver, with a color-forming compound bound thereto by physical or chemical union, said grain or crystal being sensitized to record a. particular color or set of colors.
14. The method of producing the grain or crystal of the preceding claim which consists in the precipitating of the silver compound in the presence of a color-,former and subjecting it to the action of a color-sensitizer.
LEOPOLD D. MANNES. LEOPOLD GODOWSKY, J R.
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
BE376781D BE376781A (en) | 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 (en) | 1930-03-19 | 1931-01-20 | Color photography process |
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) |
BE (1) | BE376781A (en) |
FR (1) | FR709706A (en) |
GB (1) | GB376794A (en) |
Cited By (6)
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)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
BE414508A (en) * | 1935-04-10 | |||
DE743341C (en) * | 1936-01-18 | 1943-12-23 | Ig Farbenindustrie Ag | Process for making photographic images |
BE419447A (en) * | 1936-01-18 | |||
DE750122C (en) * | 1936-05-29 | 1944-12-14 | Process for sensitizing multilayer photographic material for color photography |
-
0
- BE BE376781D patent/BE376781A/xx unknown
-
1930
- 1930-03-19 US US437266A patent/US1996928A/en not_active Expired - Lifetime
-
1931
- 1931-01-16 GB GB1552/31A patent/GB376794A/en not_active Expired
- 1931-01-20 FR FR709706D patent/FR709706A/en not_active Expired
Cited By (6)
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 |
---|---|
BE376781A (en) | |
GB376794A (en) | 1932-07-18 |
FR709706A (en) | 1931-08-12 |
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