US2984567A - Method for elimination of reversal reexposure in processing photographic films - Google Patents
Method for elimination of reversal reexposure in processing photographic films Download PDFInfo
- Publication number
- US2984567A US2984567A US699478A US69947857A US2984567A US 2984567 A US2984567 A US 2984567A US 699478 A US699478 A US 699478A US 69947857 A US69947857 A US 69947857A US 2984567 A US2984567 A US 2984567A
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- US
- United States
- Prior art keywords
- photographic
- silver halide
- color
- halide emulsion
- image
- 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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- 238000000034 method Methods 0.000 title claims description 23
- 230000008030 elimination Effects 0.000 title 1
- 238000003379 elimination reaction Methods 0.000 title 1
- -1 SILVER HALIDE Chemical class 0.000 claims description 61
- 229910052709 silver Inorganic materials 0.000 claims description 58
- 239000004332 silver Substances 0.000 claims description 58
- 239000000839 emulsion Substances 0.000 claims description 47
- 229910052783 alkali metal Inorganic materials 0.000 claims description 28
- 150000001340 alkali metals Chemical class 0.000 claims description 27
- 239000000243 solution Substances 0.000 claims description 23
- 230000015572 biosynthetic process Effects 0.000 claims description 10
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 claims description 8
- 229910052700 potassium Inorganic materials 0.000 claims description 8
- 239000011591 potassium Substances 0.000 claims description 8
- 239000007864 aqueous solution Substances 0.000 claims description 7
- 229910000033 sodium borohydride Inorganic materials 0.000 claims description 5
- 239000012279 sodium borohydride Substances 0.000 claims description 5
- 239000002667 nucleating agent Substances 0.000 claims description 4
- 239000010410 layer Substances 0.000 description 14
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 14
- 239000000203 mixture Substances 0.000 description 11
- QIGBRXMKCJKVMJ-UHFFFAOYSA-N Hydroquinone Chemical compound OC1=CC=C(O)C=C1 QIGBRXMKCJKVMJ-UHFFFAOYSA-N 0.000 description 6
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 6
- IOLCXVTUBQKXJR-UHFFFAOYSA-M potassium bromide Chemical compound [K+].[Br-] IOLCXVTUBQKXJR-UHFFFAOYSA-M 0.000 description 6
- NLKNQRATVPKPDG-UHFFFAOYSA-M potassium iodide Chemical compound [K+].[I-] NLKNQRATVPKPDG-UHFFFAOYSA-M 0.000 description 6
- 230000000694 effects Effects 0.000 description 5
- 238000004061 bleaching Methods 0.000 description 4
- 239000000975 dye Substances 0.000 description 4
- 238000001228 spectrum Methods 0.000 description 4
- WVDDGKGOMKODPV-UHFFFAOYSA-N Benzyl alcohol Chemical compound OCC1=CC=CC=C1 WVDDGKGOMKODPV-UHFFFAOYSA-N 0.000 description 3
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 3
- WSFSSNUMVMOOMR-UHFFFAOYSA-N Formaldehyde Chemical compound O=C WSFSSNUMVMOOMR-UHFFFAOYSA-N 0.000 description 3
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 3
- DWAQJAXMDSEUJJ-UHFFFAOYSA-M Sodium bisulfite Chemical compound [Na+].OS([O-])=O DWAQJAXMDSEUJJ-UHFFFAOYSA-M 0.000 description 3
- 239000007844 bleaching agent Substances 0.000 description 3
- 239000003795 chemical substances by application Substances 0.000 description 3
- 150000001875 compounds Chemical class 0.000 description 3
- 150000002429 hydrazines Chemical class 0.000 description 3
- 150000004989 p-phenylenediamines Chemical class 0.000 description 3
- KMUONIBRACKNSN-UHFFFAOYSA-N potassium dichromate Chemical compound [K+].[K+].[O-][Cr](=O)(=O)O[Cr]([O-])(=O)=O KMUONIBRACKNSN-UHFFFAOYSA-N 0.000 description 3
- 230000033458 reproduction Effects 0.000 description 3
- 235000010267 sodium hydrogen sulphite Nutrition 0.000 description 3
- GEYOCULIXLDCMW-UHFFFAOYSA-N 1,2-phenylenediamine Chemical compound NC1=CC=CC=C1N GEYOCULIXLDCMW-UHFFFAOYSA-N 0.000 description 2
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 2
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 2
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 2
- 229940101006 anhydrous sodium sulfite Drugs 0.000 description 2
- YCIMNLLNPGFGHC-UHFFFAOYSA-N catechol Chemical compound OC1=CC=CC=C1O YCIMNLLNPGFGHC-UHFFFAOYSA-N 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 230000003647 oxidation Effects 0.000 description 2
- 238000007254 oxidation reaction Methods 0.000 description 2
- WQGWDDDVZFFDIG-UHFFFAOYSA-N pyrogallol Chemical compound OC1=CC=CC(O)=C1O WQGWDDDVZFFDIG-UHFFFAOYSA-N 0.000 description 2
- 229910052708 sodium Inorganic materials 0.000 description 2
- 239000011734 sodium Substances 0.000 description 2
- GEHJYWRUCIMESM-UHFFFAOYSA-L sodium sulfite Chemical compound [Na+].[Na+].[O-]S([O-])=O GEHJYWRUCIMESM-UHFFFAOYSA-L 0.000 description 2
- NRESDXFFSNBDGP-UHFFFAOYSA-N (4-bromophenyl)hydrazine Chemical compound NNC1=CC=C(Br)C=C1 NRESDXFFSNBDGP-UHFFFAOYSA-N 0.000 description 1
- BCESCHGDVIYYPC-UHFFFAOYSA-N 2-(ethylamino)phenol Chemical class CCNC1=CC=CC=C1O BCESCHGDVIYYPC-UHFFFAOYSA-N 0.000 description 1
- JHKKTXXMAQLGJB-UHFFFAOYSA-N 2-(methylamino)phenol Chemical class CNC1=CC=CC=C1O JHKKTXXMAQLGJB-UHFFFAOYSA-N 0.000 description 1
- BNZCDZDLTIHJAC-UHFFFAOYSA-N 2-azaniumylethylazanium;sulfate Chemical compound NCC[NH3+].OS([O-])(=O)=O BNZCDZDLTIHJAC-UHFFFAOYSA-N 0.000 description 1
- ZFIQGRISGKSVAG-UHFFFAOYSA-N 4-methylaminophenol Chemical compound CNC1=CC=C(O)C=C1 ZFIQGRISGKSVAG-UHFFFAOYSA-N 0.000 description 1
- ZVNPWFOVUDMGRP-UHFFFAOYSA-N 4-methylaminophenol sulfate Chemical compound OS(O)(=O)=O.CNC1=CC=C(O)C=C1.CNC1=CC=C(O)C=C1 ZVNPWFOVUDMGRP-UHFFFAOYSA-N 0.000 description 1
- CSGQJHQYWJLPKY-UHFFFAOYSA-N CITRAZINIC ACID Chemical compound OC(=O)C=1C=C(O)NC(=O)C=1 CSGQJHQYWJLPKY-UHFFFAOYSA-N 0.000 description 1
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 1
- 239000004721 Polyphenylene oxide Substances 0.000 description 1
- SJOOOZPMQAWAOP-UHFFFAOYSA-N [Ag].BrCl Chemical compound [Ag].BrCl SJOOOZPMQAWAOP-UHFFFAOYSA-N 0.000 description 1
- DHKHKXVYLBGOIT-UHFFFAOYSA-N acetaldehyde Diethyl Acetal Natural products CCOC(C)OCC DHKHKXVYLBGOIT-UHFFFAOYSA-N 0.000 description 1
- 125000002777 acetyl group Chemical class [H]C([H])([H])C(*)=O 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 239000012670 alkaline solution Substances 0.000 description 1
- 125000002877 alkyl aryl group Chemical group 0.000 description 1
- 235000019445 benzyl alcohol Nutrition 0.000 description 1
- 229920002678 cellulose Polymers 0.000 description 1
- 239000003638 chemical reducing agent Substances 0.000 description 1
- OIDPCXKPHYRNKH-UHFFFAOYSA-J chrome alum Chemical compound [K]OS(=O)(=O)O[Cr]1OS(=O)(=O)O1 OIDPCXKPHYRNKH-UHFFFAOYSA-J 0.000 description 1
- 239000003086 colorant Substances 0.000 description 1
- 230000000295 complement effect Effects 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- SOCTUWSJJQCPFX-UHFFFAOYSA-N dichromate(2-) Chemical compound [O-][Cr](=O)(=O)O[Cr]([O-])(=O)=O SOCTUWSJJQCPFX-UHFFFAOYSA-N 0.000 description 1
- 230000003292 diminished effect Effects 0.000 description 1
- MQRJBSHKWOFOGF-UHFFFAOYSA-L disodium;carbonate;hydrate Chemical compound O.[Na+].[Na+].[O-]C([O-])=O MQRJBSHKWOFOGF-UHFFFAOYSA-L 0.000 description 1
- 239000002270 dispersing agent Substances 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 239000011229 interlayer Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 150000004682 monohydrates Chemical class 0.000 description 1
- 230000007935 neutral effect Effects 0.000 description 1
- ZUZQXHSOEZUAIS-UHFFFAOYSA-N nitric acid;6-nitro-1h-benzimidazole Chemical compound O[N+]([O-])=O.[O-][N+](=O)C1=CC=C2N=CNC2=C1 ZUZQXHSOEZUAIS-UHFFFAOYSA-N 0.000 description 1
- 229920002113 octoxynol Polymers 0.000 description 1
- 239000007800 oxidant agent Substances 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N phenol group Chemical group C1(=CC=CC=C1)O ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 description 1
- 150000004986 phenylenediamines Chemical class 0.000 description 1
- HKOOXMFOFWEVGF-UHFFFAOYSA-N phenylhydrazine Chemical compound NNC1=CC=CC=C1 HKOOXMFOFWEVGF-UHFFFAOYSA-N 0.000 description 1
- 229940067157 phenylhydrazine Drugs 0.000 description 1
- 229920006289 polycarbonate film Polymers 0.000 description 1
- 229920006267 polyester film Polymers 0.000 description 1
- 229920000570 polyether Polymers 0.000 description 1
- 239000012286 potassium permanganate Substances 0.000 description 1
- JEXVQSWXXUJEMA-UHFFFAOYSA-N pyrazol-3-one Chemical compound O=C1C=CN=N1 JEXVQSWXXUJEMA-UHFFFAOYSA-N 0.000 description 1
- NDGRWYRVNANFNB-UHFFFAOYSA-N pyrazolidin-3-one Chemical class O=C1CCNN1 NDGRWYRVNANFNB-UHFFFAOYSA-N 0.000 description 1
- 229940079877 pyrogallol Drugs 0.000 description 1
- 230000001235 sensitizing effect Effects 0.000 description 1
- 150000003378 silver Chemical class 0.000 description 1
- 229940076133 sodium carbonate monohydrate Drugs 0.000 description 1
- 239000011780 sodium chloride Substances 0.000 description 1
- GCLGEJMYGQKIIW-UHFFFAOYSA-H sodium hexametaphosphate Chemical compound [Na]OP1(=O)OP(=O)(O[Na])OP(=O)(O[Na])OP(=O)(O[Na])OP(=O)(O[Na])OP(=O)(O[Na])O1 GCLGEJMYGQKIIW-UHFFFAOYSA-H 0.000 description 1
- 235000019982 sodium hexametaphosphate Nutrition 0.000 description 1
- 239000001488 sodium phosphate Substances 0.000 description 1
- 229940001482 sodium sulfite Drugs 0.000 description 1
- 235000010265 sodium sulphite Nutrition 0.000 description 1
- VGTPCRGMBIAPIM-UHFFFAOYSA-M sodium thiocyanate Chemical compound [Na+].[S-]C#N VGTPCRGMBIAPIM-UHFFFAOYSA-M 0.000 description 1
- AKHNMLFCWUSKQB-UHFFFAOYSA-L sodium thiosulfate Chemical compound [Na+].[Na+].[O-]S([O-])(=O)=S AKHNMLFCWUSKQB-UHFFFAOYSA-L 0.000 description 1
- 235000019345 sodium thiosulphate Nutrition 0.000 description 1
- 230000003595 spectral effect Effects 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 239000001577 tetrasodium phosphonato phosphate Substances 0.000 description 1
- 150000004992 toluidines Chemical class 0.000 description 1
- RYFMWSXOAZQYPI-UHFFFAOYSA-K trisodium phosphate Chemical compound [Na+].[Na+].[Na+].[O-]P([O-])([O-])=O RYFMWSXOAZQYPI-UHFFFAOYSA-K 0.000 description 1
- 229910000406 trisodium phosphate Inorganic materials 0.000 description 1
- 235000019801 trisodium phosphate Nutrition 0.000 description 1
- 229920002554 vinyl polymer Polymers 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
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
- G03C5/00—Photographic processes or agents therefor; Regeneration of such processing agents
- G03C5/26—Processes using silver-salt-containing photosensitive materials or agents therefor
- G03C5/50—Reversal development; Contact processes
Definitions
- photographic silver halide emulsions for producing black-and-white images can be reversal processed by subjecting the exposed emulsions to conventional development, followed by bleaching, clearing, and reversal re-exposure, followed by a subsequent development step.
- the exposed emulsions can be subjected to conventional black-and-white development, followed by reversal exposure and subsequent color development. Both of these processes require that the exposed silver halide emulsions, after a first development, be given a subsequent reversal exposure before any further development can take place to produce the desired positive image.
- the reversal re-exposure for the processing of black-and-white or color reproductions can be eliminated by treating the photographic silver halide emulsions after a first (negative) development with a solution containing an alkali metal (e.g., sodium, potassium, etc.) borohydride.
- an alkali metal e.g., sodium, potassium, etc.
- the emulsions are exposed in the customary manner and given a first development in an ordinary photographic silver halide developer.
- the developed films are then Washed and given a bleaching treatment in an ordinary photographic bleach bath containing an oxidizing agent, such as permanganate, dichromate, etc.
- an oxidizing agent such as permanganate, dichromate, etc.
- the film is again washed andtreated in a clearing bath, after which the film is again rinsed.
- Treatment of the film with an alkali metal borohydride aqueous solution produces a positive image, free from stain, without any exposure to light.
- the concentration of the alkali metal borohydride solution can be controlled so that no image is produced directly.
- the treated emulsion can be given a conventional development which rapidly produces the desired positive image.
- concentration of the alkali metal borohydride in the treating solution can vary depending upon whether it is desired to produce an image directly without any subsequent development, or Whether it is desired to use a second development in a conventional photographic developer. In general, the concentration of the alkali metal borohydride can vary from about 0.1 g./liter to concentrations as high as 30 g./.liter. While more concentrated solutions 2,984,567 Patented May 16, .1961
- the alkali metal borohydride treatment should not be used until immediately prior to the last color development step, inasmuch as the alkali metal borohydride will nucleate all silver halide which has not been exposed arid developed previously.
- the alkali metal borohydride treatment it is possible to use the alkali metal borohydride treatment immediately prior to the last color development step and to thus eliminate the re-exposure preceding that step.
- Particularly useful color films for reversal processing according to the method of our invention are films comprising a conventional support, such as cellulose esters, glass, polyester film, polyvinyl acetal film, polycarbonate film, etc., having coated thereon at least two silver halide layers which have been sensitized to particular regions of the spectrum.
- a conventional support such as cellulose esters, glass, polyester film, polyvinyl acetal film, polycarbonate film, etc.
- These emulsions have incorporated therein the color-forming components or couplers, which combine with the oxidation products of the photographic color developers, to produce the desired color images.
- a coupler for the cyan image e.g., a phenolic coupler
- a green-sensitized photographic silver halide emulsion having incorporated therein a coupler for the magenta image e.g., pyrazolone coupler
- the photographic element can also contain conventional interlayers and filter layers, such as a yellow filter layer beneath the blue-sensitized emulsion to prevent exposure by blue light to either the redor green-sensitized emulsion.
- Photographic color films of the above-described type can be processed by a technique requiring fewer steps than the processing of color films of the Kodachrome type mentioned above.
- Example 1 An ordinary photographic silver halide emulsion, such as Kodak PlusX 16 mm. Reversal Film was exposed to a step wedge in an Eastman Type Ib sensitometer and then developed for 3 minutes in a developer having the following composition:
- Example 2 A photographic multi-layer color element containing three differentially sensitized photographic silver halide emulsion layers, having color-forming agents or couplers incorporated therein, was exposed in the usual manner to a subject. The exposed color film was then developed in a developer having the following composition:
- the element was again washed and treated once again with the clearing and fixing bath identified above.
- the element was again washed and treated in a stabilizing bath having the following composition:
- Formaldehyde (37% by weight) cc 7.0 Dispersing agent 1 g 0.5 Water to make 1 liter.
- Triton-X 100 i.e., an alkylaryl polyether alcohol (octylphenoxy poiyethoxy ethanol).
- Photographic color elements which can be processed according to the method described in Example 2 above include the elements shown in Schinzcl U.S. Patent 2,266,443, issued December 16, 1941, and Fierke U.S. Patent 2,272,191, issued February 10, 1942, for example.
- Photographic elements, wherein the silver halide emulsions contain the coupler or color-forming component in dispersed form, have been found particularly suitable for the process described in Example 2. It has been found that ordinary processing of such reversal-type films frequently causes a re-reversal effect, particularly in the magneta dye image and a density loss in the shoulder region of the reversal exposure scale.
- Example 3 A photographic silver chlorobromide emulsion was exposed to a step wedge in the usual manner and then developed for about 2 minutes in a developer for high contrast emulsions, such as a developer having the following composition:
- Development of the exposed photographic silver halide emulsions to produce a black-and-white negative image as described in the foregoing examples can be accomplished using any of the conventional developers customarily employed in photographic art for producing black-and-white negative images.
- Such developers include compounds known as polyhydroxybenzenes (e.g., hydroquinone, catechol, pyrogallol, etc.) and N-substituted aminophenols (e.g., N-methylaminophenols, N- ethylaminophenols, etc.), or mixtures of such developers.
- Prominent among such developing agents for the rapid development of photographic images are those comprising hydroquinone and Elon developer (N-methylpaminophenol).
- Color development can be carried out using any of the well known color-forming developers which are capable of coupling with the color-forming components or couplers.
- Particularly useful color-forming developers are the phenylenediamines and substituted derivatives thereof.
- Typical of such color-forming developers are the sulfonamidosubstituted p-phenylenediamines disclosed in Weissberger U.S. Patent 2,548,574, issued April 10, 1951, the substituted p-phenylenediamines disclosed in Weissberger et al. U.S. Patents 2,552,240-2, issued May 8, 1951, and the substituted p-phenylenediamines disclosed in Weissberger et al. U.S. Patent 2,566,271, issued August 28, 1951.
- Other phenylenediamine color-forming developers can be employed to like advantage in the process of our invention.
- the extent of treatment will obviously depend upon the type of film being treated and whether one de sires to obtain merely a black-and-white image, or whether one desires to process a color film to produce subtractively-colored images.
- the pH of the alkali metal borohydride solutions can be varied to modify the activity of the alkali metal borohydrides. In general, we have found that the pH should advantageously not be allowed to drop below about 10, since these borohydrides become somewhat unstable at too low pH (i.e., toward acid side of neutrality) values.
- the method of processing color films as herein described is particularly useful where the photographic silver halide emulsions are hardened prior to the treatment with the alkali metal borohydride solutions.
- the photographic silver halide emulsions are hardened prior to the treatment with the alkali metal borohydride solutions.
- hydrazine compounds such as phenylhydrazine, l-naphthylhydrazine, p-bromophenylhydrazine, etc.
- phenylhydrazine, l-naphthylhydrazine, p-bromophenylhydrazine, etc. can be used, though less advantageously than the alkali metal borohydrides of our invention.
- Other hydrazine compounds which can be used comprise those shown in Ives U.S. Patent 2,588,982, issued March 11, 1952. Again, the alkali metal borohydrides of our invention have distinct advantages over the hydrazine compounds shown in the United States patent.
- a photographic reversal process comprising eX- posing a photographic silver halide emulsion to an im-' age, developing said photographic silver halide emulsion to produce a black-and-white negative image by contacting said exposed photographic silver halide emulsion with a photographic developer, and subsequently obtaining a reversal positive image by contacting said photographic silver halide emulsion with a nucleating agent for a sufficient time only to nucleate previously unexposed silver halide substantially without the formation of a visible image, followed by contacting said photographic silver halide emulsion with a second photographic developer for a suflicient time to develop a visible image, the step of nucleating said photographic silver halide emulsion by contacting said photographic silver halide emulsion with an aqueous solution of an alkali metal borohydride having a pH of at least 10.0 and containing at least 0.1 g./liter of solution but not more than 30 g./
- a method of producing a photographic color reproduction comprising exposing to a colored image a photographic element containing at least two photographic silver halide emulsion layers which have been differentially sensitized to diiferent spectral regions, developing said photographic element to a negative blackand-white image by treatment with a photographic blackand-white developer, contacting said photographic element with a nucleating agent for sufiicient time only to nucleate previously unexposed silver halide substantially without the formation of a visible image, and developing said photographic element in a photographic color developer in the presence of a color-forming compound which couples with the oxidation products of said photographic color developer to produce a colored image, the step comprising nucleating said previously unexposed silver halide by contacting said photographic element with an aqueous solution of an alkali metal borohydride having a pH of at least 10.0 and containing at least 0.1 g./liter of solution but not more than 30 g./liter of solution ot an alkali metal borohydride selected from the
- a method of reproducing a photographic color reproduction comprising exposing to a colored image a photographic element comprising a support having coated thereon three photographic silver halide emulsion layers, one of said layers being sensitive to the red region of the spectrum and having dispersed therein a coupler for producing a cyan image, one of said layers being sensitive to the green region of the spectrum and containing a coupler for producing a magenta image, and the third one of said layers being sensitive to the blue region of the spectrum and containing a coupler for producing a 7 yellow image, developing said photographic element in a photographic black-and-white developer to produce a negative image, contacting said photographic element with a nucleating agent for a sufiicient time only to nucleate previously unexposed silver halide substantially without the formation of a visible image, developing said photographic element in a photographic phenylenediamine color developer to produce colored images bearing a complementary relationship to the color in the original being produced, contacting said photographic element with a photographic clearing and fixing solution, contacting of
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Silver Salt Photography Or Processing Solution Therefor (AREA)
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| BE573379D BE573379A (en, 2012) | 1957-11-29 | ||
| US699478A US2984567A (en) | 1957-11-29 | 1957-11-29 | Method for elimination of reversal reexposure in processing photographic films |
| FR780406A FR1221623A (fr) | 1957-11-29 | 1958-11-28 | Procédé de traitement photographique |
| GB38748/58A GB904462A (en) | 1957-11-29 | 1958-12-01 | Improved photographic processes |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US699478A US2984567A (en) | 1957-11-29 | 1957-11-29 | Method for elimination of reversal reexposure in processing photographic films |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| US2984567A true US2984567A (en) | 1961-05-16 |
Family
ID=24809510
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US699478A Expired - Lifetime US2984567A (en) | 1957-11-29 | 1957-11-29 | Method for elimination of reversal reexposure in processing photographic films |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US2984567A (en, 2012) |
| BE (1) | BE573379A (en, 2012) |
| FR (1) | FR1221623A (en, 2012) |
| GB (1) | GB904462A (en, 2012) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3168400A (en) * | 1961-05-22 | 1965-02-02 | Eastman Kodak Co | Rapid processing of photographic color materials |
| US3246987A (en) * | 1962-07-11 | 1966-04-19 | Eastman Kodak Co | Method for elimination of reversal reexposure in processing photographic elements |
| US3266895A (en) * | 1963-11-14 | 1966-08-16 | Eastman Kodak Co | Method for processing multilayer color film |
| US3666648A (en) * | 1969-11-05 | 1972-05-30 | Ibm | In-situ reclamation of master patterns for printing microcircuit images on reversely sensitized material |
| EP0563985A1 (en) | 1992-04-03 | 1993-10-06 | Fuji Photo Film Co., Ltd. | Silver halide color photographic material |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1628445A (en) * | 1927-05-10 | Georges emmanuel zelger | ||
| US1962348A (en) * | 1929-11-13 | 1934-06-12 | Eastman Kodak Co | Photographic reversal process |
| US2122599A (en) * | 1935-12-23 | 1938-07-05 | Agfa Ansco Corp | Photographic developers |
| US2159466A (en) * | 1936-11-10 | 1939-05-23 | Agfa Ansce Corp | Reversal development of light-sensitive silver halide emulsions |
| US2295013A (en) * | 1936-05-09 | 1942-09-08 | Eastman Kodak Co | Method of developing multilayer photographic color films |
| US2339309A (en) * | 1941-09-25 | 1944-01-18 | Du Pont | Photographic reducing composition and process |
| US2461661A (en) * | 1945-01-09 | 1949-02-15 | Hermann I Schlesinger | Preparation of alkali metal compounds |
| US2766760A (en) * | 1953-09-15 | 1956-10-16 | Gillette Co | Hair waving with borohydrides |
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0
- BE BE573379D patent/BE573379A/xx unknown
-
1957
- 1957-11-29 US US699478A patent/US2984567A/en not_active Expired - Lifetime
-
1958
- 1958-11-28 FR FR780406A patent/FR1221623A/fr not_active Expired
- 1958-12-01 GB GB38748/58A patent/GB904462A/en not_active Expired
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1628445A (en) * | 1927-05-10 | Georges emmanuel zelger | ||
| US1962348A (en) * | 1929-11-13 | 1934-06-12 | Eastman Kodak Co | Photographic reversal process |
| US2122599A (en) * | 1935-12-23 | 1938-07-05 | Agfa Ansco Corp | Photographic developers |
| US2295013A (en) * | 1936-05-09 | 1942-09-08 | Eastman Kodak Co | Method of developing multilayer photographic color films |
| US2159466A (en) * | 1936-11-10 | 1939-05-23 | Agfa Ansce Corp | Reversal development of light-sensitive silver halide emulsions |
| US2339309A (en) * | 1941-09-25 | 1944-01-18 | Du Pont | Photographic reducing composition and process |
| US2461661A (en) * | 1945-01-09 | 1949-02-15 | Hermann I Schlesinger | Preparation of alkali metal compounds |
| US2766760A (en) * | 1953-09-15 | 1956-10-16 | Gillette Co | Hair waving with borohydrides |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3168400A (en) * | 1961-05-22 | 1965-02-02 | Eastman Kodak Co | Rapid processing of photographic color materials |
| US3246987A (en) * | 1962-07-11 | 1966-04-19 | Eastman Kodak Co | Method for elimination of reversal reexposure in processing photographic elements |
| US3266895A (en) * | 1963-11-14 | 1966-08-16 | Eastman Kodak Co | Method for processing multilayer color film |
| US3666648A (en) * | 1969-11-05 | 1972-05-30 | Ibm | In-situ reclamation of master patterns for printing microcircuit images on reversely sensitized material |
| EP0563985A1 (en) | 1992-04-03 | 1993-10-06 | Fuji Photo Film Co., Ltd. | Silver halide color photographic material |
Also Published As
| Publication number | Publication date |
|---|---|
| FR1221623A (fr) | 1960-06-02 |
| BE573379A (en, 2012) | |
| GB904462A (en) | 1962-08-29 |
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