US3656950A - Color photographic processes - Google Patents

Color photographic processes Download PDF

Info

Publication number
US3656950A
US3656950A US94993A US3656950DA US3656950A US 3656950 A US3656950 A US 3656950A US 94993 A US94993 A US 94993A US 3656950D A US3656950D A US 3656950DA US 3656950 A US3656950 A US 3656950A
Authority
US
United States
Prior art keywords
silver halide
color developing
color
coated
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
Application number
US94993A
Other languages
English (en)
Inventor
Richard L Bent
Rowland G Mowrey
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
Original Assignee
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
Application filed by Eastman Kodak Co filed Critical Eastman Kodak Co
Application granted granted Critical
Publication of US3656950A publication Critical patent/US3656950A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

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
    • G03C5/29—Development processes or agents therefor
    • G03C5/30—Developers
    • G03C5/3021—Developers with oxydisable hydroxyl or amine groups linked to an aromatic ring

Definitions

  • ABSTRACT Color development processes with aqueous alkaline color developing compositions containing a 3-alkyl-N-alkyl-N-alkoxyalkyl-p-phenylenediamine color developing agent or a 3- alkoxy-N-alkyl-N-alkoxyalkyl-p-phenylenediamine color developing agent are advantageously used to produce good color reproductions with image dyes of superior stability to prolonged exposure to heat, humidity and/or light in multilayer, multicolor photographic elements coated on opaque supports and containing 65 mg to 375 mg of silver chlorobromide per in in at least the red-sensitive layer and the greensensitive layer.
  • Color development processes use active aromatic primary amino dye developing agents; however, not "all silver halide grains containing latent image centers are developed to silver and dye. These so-called dead grains are wasted in color photographic development. Color development processes are desired that make more efficient use of latent image-exposed silver halide grains so that the ratio of dye produced to exposed silver halide is larger than the ratio produced in processes known before our invention.
  • Color development processes are also desired which produce dye, images having better stability to prolonged exposure to heat, light and high humidities.
  • Another object of our invention is to provide a novel color development process which not only develops substantially all silver halide grains containing latent image centers, but produces a higher developed dye to silver ratio than is produced by prior art color processes.
  • Another object of our invention is to provide a novel color development process which gives good color reproduction with color photographic elements containing in the range of from about 65 to about 375 mg/m of red-sensitized silver halide, in the range of from about 65 to about 375 mg/m of green-sensitized silver halide and in the range of from about 120 to about 375 mg/m of blue-sensitive silver halide.
  • Another object of our invention is to provide a novel color development process which produces dye images having improved stability to prolonged exposure to heat, elevated humidities and/or light.
  • n is an integer of 2 to 4;
  • R is an alkyl group having one to four carbon atoms, e.g., methyl, ethyl, propyl, butyl, etc.; and R is an alkyl group having from one to four carbon atoms, e.g., methyl, ethyl, propyl, butyl, etc. or an alkoxy group having from one to four carbon atoms, e.g., methoxy, ethoxy, propoxy, butoxy, etc.
  • Typical representative examples of the color developing agents of Formula I are the following:
  • N-Ethyl-N-methoxyethyl-3-methyI-p-phenylenediarnine 2.
  • N-Ethyl-N-methoxybutyl-3-methyl-p-phenylenediarnine 3.
  • N-Ethyl-N-ethoxyethyl-3-methyl-p-phenylenediamine 4.
  • N-Ethyl-N-butoxyethyl-3-methyl-p-phenylenediamine are advantageously used as the free base or as salts of inorganic or organic acids.
  • the hydrochloric acid salts, the sulfuric acid salts, the phosphoric acid salts, the oxalic acid salts, the p-toluenesulfonic acid salts, the benzene disulfonic acid salts and the naphthalene disulfonic acid salts are used to advantage in our process.
  • the color developing agents of Formula I are used advantageously in aqueous alkaline color developing composition over a wide range of concentrations, with an operable range of from about 0.5 g/] to about 15 g/l and a preferred range of from about 1.0 g/] to about 10.0 g/l.
  • addenda used to advantage in these developing compositions include benzyl alcohol, alkali metal chlorides, alkali metal bromides, alkali metal sulfites, alkali metal salts of weak acids (e.g., carbonates, borates, phosphates, etc.) and any other salts capable of buffering in the range of from about 9 to about 13, stabilizers for color developing agents (e.g., hydroxylamine sulfate, dihydroxyacetone, glycolaldehyde, glyceraldehyde, dihydroxymaleic acid, etc.), water softeners (e.g., sodium hexametaphosphate, etc.), etc.
  • a typical color developing composition used in our process is as follows:
  • the process of our invention comprises treating latent image exposed multicolor reflection photographic elements with an aqueous alkaline color developing composition, as described herein previously, and containing either a 3-alkyl- N-alkyl-N-alkoxyalkyl-p-phenylenediamine or a 3-alkoxy-N- alkyl-N-alkoxyalkyl-p-phenylenediamine color developing agent, especially as defined by Formula I until substantially all of the silver halide grains containing latent image sites are developed to silver and the oxidized developing agent has reacted with the color-forming coupler in the layer containing the developed silver to form the corresponding nondiffusible dye image.
  • an aqueous alkaline color developing composition as described herein previously, and containing either a 3-alkyl- N-alkyl-N-alkoxyalkyl-p-phenylenediamine or a 3-alkoxy-N- alkyl-N-alkoxyalkyl-p-phenylenediamine color
  • the photographic element is contacted with the developer solution which is advantageously at a temperature in the range of from about 15 C to about 40 C.
  • the optimum development time depends upon the particular element, the particular developer solution temperature and other factors and is easily determined by methods wellknown in the art.
  • Treatment with the aqueous developing composition is advantageously accomplished by any of the methods conventionally used including immersion of the element in a tank of the developer, contacting and coating the element with a film of developer transferred to the element with any appropriate means, such as, roller applicator, coating hopper, etc.
  • the color developed element is treated to convert silver to a silver salt with a bleach and then remove the silver salts from the element with a fixing bath or, alternatively, combining these steps into a single bleach-fix step.
  • the element is advantageously given a stabilizing step at the end of the process just prior to drying.
  • the color developed element is treated with the following steps: a stop-fix, wash, bleach, wash, harden-fix, wash and stabilize.
  • the color developed element is bleach-fixed, bleached, washed and stabilized as described in Bard et al., U.S. Pat. No.
  • any multicolor reflection photographic elements are used to advantage in our process. These elements are usually coated on an opaque support, such as, paper, pigmented film supports, including pigmented cellulose nitrate film, pigmented cellulose ester film, pigmented poly( vinyl acetal) film pigmented polystyrene film, pigmented poly(ethylene terephthalate) film, pigmented polycarbonated film, etc., metal, etc.
  • an opaque support such as, paper, pigmented film supports, including pigmented cellulose nitrate film, pigmented cellulose ester film, pigmented poly( vinyl acetal) film pigmented polystyrene film, pigmented poly(ethylene terephthalate) film, pigmented polycarbonated film, etc., metal, etc.
  • a particularly advantageous support is paper, paper that is partially acetylated or coated with baryta or titanium dioxide and/or coated with a hydrophobic resin, such as, a poly-a-olefin containing two to 10 carbon atoms, e.g., polyethylene, polypropylene, polybutylene, poly(ethylene terephthalate), etc., polyamides, polyacetals, polycarbonates, cellulose esters, cellulose ethers, etc.
  • the hydrophobic resin coatings described herein are advantageously electron-bombarded to improve the adhesion of hydrophilic colloid layers coated on them as has been described in the prior art, such as, by Carroll et al., U.S. Pat. No. 3,220,842; Crawford et al., U.S. Pat. No. 3,117,865, etc.
  • the light-sensitive silver halide emulsion layers are arranged on one side of the support in any order. Especially advantageous arrangements are red-sensitive layer nearest the support, green-sensitive next, and the blue-sensitive layer outermost, or blue-sensitive layer nearest the support green-sensitive next, and red-sensitive outermost. Hydrophobic colloid interlayers between the light-sensitive layers, light-filtering layers, etc. are also used to advantage.
  • hydrophilic colloids used in photographic elements are advantageously used in light-sensitive and non-lightsensitive hydrophilic colloid layers of elements processed by our process.
  • Hydrophilic colloids used alone or in combination include both naturally occuring substances, (such as, proteins, e.g., gelatin, gelatin derivatives, etc., cellulose derivatives, polysaccharides, such as, dextrose, gum arabic and the like) and synthetic polymeric substances, such as, water-soluble polyvinyl compounds like poly(vinyl-pyrrolidone), acrylamide polymers and the like.
  • any of the ordinarily employed silver halide developing-out emulsions e.g., silver-chloride, silver chlorobromide, silver chlorobromoiodide, silver bromide, silver bromoiodide developing-out emulsions are used to advantage in elements processed according to our invention. Particularly useful results are obtained for the gelatino silver chlorobrornide emulsions.
  • Emulsions which form the latent image mostly inside the silver halide grains such as, the emulsions described in Knott et al., U.S. Pat. No. 2,456,956, are also used to advantage.
  • any of the hydrophilic colloids discussed earlier are used to advantage in the emulsion layers.
  • the silver halide emulsions used in elements processed according to our invention are advantageously spectrally sensitized with any of the appropriate cyanines, merocyanines, complex cyanines, complex merocyanines, styryls, hemicyanines, etc.
  • These dyes contain the usual basic nuclei, e.g., thiazole, benzothiazole, naphthothiazole, benzoxazole, naphthoxazole, benzoselenazole, naphthoselenazole, quinoline, etc., or in the case of merocyanine dyes, in acidic nucleus, e.g., hydantoin, 2-thiohydantoin, oxazolidone, pyrazolone, etc.
  • acidic nucleus e.g., hydantoin, 2-thiohydantoin, oxazolidone, pyrazolone, etc.
  • Such dyes are described in the Brooker et al. U.S. Pat. Nos. 2,185,182, 2,241,237; Carroll U.S. Pat. Nos.
  • Photographic silver halide emulsions can also contain such addenda as chemical sensitizers, e.g., sulfur sensitizers (e.g., allyl thiocarbamide, thiourea, a1- lylisothiocyanate, cystine, etc.), various gold compounds (e.g., potassium chloroaurate, auric trichloride, etc.) (see Baldsiefen, U.S. Pat. No. 2,540,085; Damschroder, U.S. Pat. No. 2,597,856 and Yutzy and Leermakers, U.S. Pat. No.
  • chemical sensitizers e.g., sulfur sensitizers (e.g., allyl thiocarbamide, thiourea, a1- lylisothiocyanate, cystine, etc.)
  • gold compounds e.g., potassium chloroaurate, auric trichloride, etc.
  • various palladium compounds such as, palladium chloride (Baldsiefen et al., U.S. Pat. No. 2,540,086), potassium chloropalladate (Stauffer et al. U.S. Pat. No. 2,598,079), etc., or mixtures of such sensitizers; anti-foggants, such as, ammonium chloroplatinate (Trivelli and Smith, U.S. Pat. No. 2,566,245), ammonium chloroplatinite (Trivelli and Smith, U.S. Pat. No.
  • any of the color-forming couplers used in photographic elements are used to advantage in our photographic materials.
  • the phenol and naphthol cyan dye-forming couplers used in advantage are those described by the following U.S. Pat. Nos. 2,423,730, 2,474,293, 2,521,908, 2,725,291, 2,801,171, 3,253,294, etc.
  • the ketomethylene yellow dye-forming couplers used to advantage are those described in U.S. Pat. Nos. 2,298,443, 2,778,658, 2,801,171, 2,875,057, 3,253,924, 3,277,155, etc.
  • the S-pyrazolone magenta dye-forming couplers used to advantage are those described in U.S. Pat. Nos. 2,600,788, 2,801,171, 3,252,924, etc.
  • Dispersing agents for color-forming couplers and the dispersing techniques used to advantage include those set forth in Jelley et al., U.S. Pat. No. 2,322,027; Mannes et al., U.S. Pat. No. 2,304,940; Fierke eta1., U.S. Pat. No. 2,801,171 etc.
  • the color developing agents of Formula 1 are prepared by reacting the appropriate w-alkoxyalkyl chloride or bromide with the appropriate N-ethyl-3-alky1aniline or N- ethyl-3-alkoxyaniline.
  • the tertiary anilines formed by this reaction are then either nitrosated or azo-coupled, followed by catalytic hydrogenation to give the corresponding p-phenylenediarnines.
  • Some of the developing agents of Formula 1 are advantageously isolated as the acid salts.
  • the di-p-toluenesulfonic acid salt of Color Developing Agent 3 is advantageously prepared by the following sequence of reactions:
  • N-(B-Ethoxyethyl)-N-ethyl-3-methylaniline A mixture of 135 g (1 mole) of N-ethyI-S-methyl-aniline, 153 g (1 mole) of 2-bromoethyl ethyl ether (purified by treatment with sodium bicarbonate and distillation), 88.2 g (1.05 mole) of sodium bicarbonate, 1 100 ml of ethanol and 290 ml of water are refluxed for a total of 64 hours. The ethanol is removed by distillation and the oil layer is extracted with ether; the ether extracts are dried and concentrated, followed by distillation of the residual oil under reduced pressure. After removal of the lower boiling foreruns, the fraction, b.p. 92-95 C/ 1mm (overheats readily), is collected. The yield of I is approximately 70 percent.
  • the mixture is cooled to about 25 C and allowed to stand undisturbed overnight.
  • the developer salt is filtered offand washed in funnel with small portions of isopropyl alcohol.
  • the yield of Developing Agent 3, mp. 2l4-2l6 C, is approximately 70 percent.
  • the di-p-toluenesulfonic acid salt of Color Developing Agent 5 is advantageously prepared similarly to Developing Agent 3, using N-ethyl-3-methoxyaniline and 2-bromoethyl methyl ether as starting materials.
  • the di-p-toluenesulfonic acid salt of 4-amino-N-ethyl-3- methoxy-N-(B-methoxyethyl)aniline (Developing Agent 5): Exactly 4.86 g (0.127 mole) of the azo dye, IV, is reduced on Parr shaker, using 300 ml of absolutely ethyl alcohol and Raney nickel as catalyst. When complete, the catalyst is filtered off, washed on funnel with more alcohol. A total of 4.84 g (0.0254 mole) of p-toluenesulfonic acid (hydrate) in 50 ml of ethanol is added; no precipitate occurs and the solution is concentrated to dryness under partial vacuum.
  • the gummy residue is then dissolved in a small quantity of absolute ethyl alcohol and a large excess of diethyl ether is added; the developer salt again comes out as a gum; the solution is cooled thoroughly (refrigerator) to precipitate the suspension and then the ether-alcohol layer is decanted This treatment is repeated twice more to remove all of the regenerated 2,5-dichloroaniline. Finally, the developer salt is slurried thoroughly with ether only, gradually becoming crystalline; it is dried in a vacuum oven. The yield of Developer 5, mp. -l 62 C, is 62 percent.
  • the di-p-toluenesulfonic acid salt of Color Developing Agent 1 is made in a manner similar to the synthesis described for the corresponding acid salt of Color Developing Agent 5, excepting that an equimolar amount of N-ethyl-3- methylaniline is used in place of N-ethyl-3-methoxyaniline.
  • the di-p-toluenesulfonic acid salt of Color Developing Agent 2 is made in a manner similar to the synthesis described for the corresponding acid salt of Color Developing Agent 5, excepting that an equimolar amount of m-bromobutyl methyl ether is used in place of 2-bromoethyl methyl ether.
  • the dip-toluenesulfonic acid salt of Color Developing Agent 4 is advantageously made in a manner similar to that described for the corresponding acid salt of Color Developing Agent 3, excepting that an equimolar amount of N-ethyl-3- propylaniline is used in place of N-ethyl-3-methylaniline.
  • Still other color developing agents of Formula I are made using the syntheses illustrated herein using the appropriate intermediates.
  • This solution is divided into 5 equal portions which are made into Developer Solutions (or Developers) 1, 2, 3, 4 and 5 by adding Color Developing Agents 1, 2, 3, 4and 5, respectively, to give a concentration of 0.00918 mole of developing agent per liter of the developer solutions.
  • Five pieces of a multilayer color reflection print element comprising a TiO pigmented polyethylene-coated paper support coated on one side in succession with a gelatin layer containing about 350 mg of a bluesensitive silver chlorobromide per m and a nondiffusible apivalylacetanilide nondifiusible yellow-dye-forming coupler described in Weissberger et al., U.S. Pat. No.
  • Color developer Wash Bleach Wash Hardener-fix Wash Stabilizer A conventional acetic acid, sodium sulflte stop-fix bath, a conventional potassium ferricyanide bleach, a conventional hardener-fix and a conventional citric acid and borax stabilizer bath, all as described by Van Campen, U.S. Pat. No. 2,956,879 in Columns and 6, are used in this process. Good color reproductions of the original light image are obtained in each of the original light image are processed strips of reflection print element.
  • Developer Solutions (or Developers) 1, 4, B and C are prepared. Developer Solutions 1 and 4 are the same as Developer Solutions 1 and 4 in Example 1. Developer Solutions B and C are not developing solutions used according to our invention, since they differ from Color Developer Solution 1 by containing equimolar concentrations of prior art Color Developing Agent B, i.e., N-ethyl-N-B-hydroxyethyl-B- methyl-p-phenylenediamine and prior art Color Developing Agent C, i.e., N-ethyl-N-B methanesulfonamido-ethy1-3- methyl-p-phenylenediamine.
  • prior art Color Developing Agent B i.e., N-ethyl-N-B-hydroxyethyl-B- methyl-p-phenylenediamine
  • prior art Color Developing Agent C i.e., N-ethyl-N-B methanesulfonamido-ethy1-3- methyl-p-
  • Color Developing Agents B and C are outside of Formula I Developing Agents used in the processes of our invention.
  • Four pieces of a reflection print element similar to that described in Example 1, excepting that the red-sensitive, green-sensitive and blue-sensitive layers contained 538,538 and 500 mg of silver chlorobromide per m, respectively, (outside the invention) instead of about 190,260 and 350 mg of silver chlorobromide per m respectively, (of the invention) are sensitometrically exposed to a step tablet through narrow band red, green and blue filters.
  • One-half of each of the exposed pieces of the elements is developed for 6 minutes in the developer solution indicated in Table 1, then stop-fixed, washed, bleached, washed, hardenfixed, washed and stabilized as described in Example 1.
  • Table 1 (a) and Table 1 (b) show that our processes using Developers l and 4 are superior to processes outside our invention which use Developers B and C in their efiiciency of utilizing silver halide to produce a dye density of 1.0 or of 2.0.
  • Developer Solutions 1 and 5 containing Color Developing Agents 1 and 5, respectively, are prepared as described in Example 1.
  • Developer Solution (or Developer) D is prepared like Developer Solution 1, but substituting 0.00918 mole of Developing Agent D, i.e., N-ethyl-N-B-hydroxyethyl-3- methoxy-p-phenylenediamine per liter of solution in place of Developing Agent 1.
  • Three pieces of the multicolor, multiplayer color reflection print element described in Example 1 are sensitometrically exposed to a step tablet through narrow band red, green and blue filters. The exposed elements are developed for six minutes at 30 C, one being developed in Developer Solution 1, one being developed in Developer Solution 5 and one being developed in Developer Solution D.
  • the elements are stop-fixed, washed, bleached, washed, harden-fixed, washed and stabilized as described in Example 1.
  • the processed and dried elements are then subjected to a 1,500-hour SANS test exposure (Simulated Average North Skylight) at 500 ft.
  • Candle intensity using an area of each element which has an original cyan dye density of 1.0 density units, an area of each element which has an original magenta dye density of 1.0 density units. The percentage loss in each of these dyes which has the selected areas, due to the 1,500-hour exposure is determined and listed in Table 2.
  • Example 4 A multilayer, multicolor reflection print element is prepared like the element of Example 1, excepting that a nondiffusible S-pyrazolone coupler described in Lestina, U.S. Pat. No. 3,519,429 and a nondifl usible a-phenoxyacetanilide yellow dye-forming coupler, described in Loria, U.S. Pat. No.
  • Ethylenediamine tetracetic acid tetrasodium salt 5 g Water to 5 g pH adjusted to 6.7 to 7.0 1 l
  • the stabilizer solution is a conventional aqueous citric acid stabilizer having a pH of 3.5. Areas of the processed elements having a cyan dye density of 1.0 and a magenta dye density of 1.0 are identified and these areas are subjected to 4,000 hours of SANS test with exposure to Average Simulated North Skylight at 500 ft. candles intensity. The percentage dye losses due to the SANS test are listed in the following table:
  • Example 4 is repeated, but using a color print material containing a nondiffusible 5-pyrazolone coupler described in US. Pat. No. 3,062,653, instead of the S-pyrazolone used in Example 4.
  • the results of the 4,000-hour SANS test are listed in the following Table:
  • EXAMPLE 6 Four pieces of a multilayer, multicolor reflection print element described in Example 3 are exposed as described in Example 3. Two of these exposed elements are given a 5-solution process as described in Example 3 and the other two exposed elements are given a three-solution process as described in Example 4. The percentage dye losses caused by subjecting the processed color prints to heat fading test for four weeks at 60 C/70 percent RH in an oven are listed in the following tables:
  • Example 7 Two samples of a multilayer, multicolor reflection photographic element on a paper support are made, Sample I like the element described in Example 1 and Sample ll like the element described in Example 2. These samples are given sensitometric exposures to an original light image. When exposed Sample I is given our color development process using Developer Solution 1, it is found that in only 4 minutes, photographic quality is obtained that is equivalent to the photographic quality in Sample II after 6 minutes color development outside our invention using Developer Solution C. Our color development step gives a valuable savings in time.
  • EXAMPLE 8 A multilayer, multicolor reflection print element is prepared like the element in Example 1, but having only about mg of silver chlorobromide per m in the red-sensitive layer and only about 240 mg of silver chlorobromide per m in the green-sensitive layer of the element of Example 1. Samples of this element are sensitometrically exposed to a step table as described in Example 2. A sample of the exposed print material is color developed for 6 minutes according to our invention in Developer Solution 1, then stop-fixed, washed, bleached, washed, harden-fixed, washed and stabilized as described in Example 1.
  • a good color reproduction is obtained of the step tablet original with the required cyan, magenta and yellow dye densities in each step of the step tablet from Dmin to Dmax even though the red-sensitive layer and the green-sensitive layer each has a very low silver chlorobromide content.
  • Another sample of the exposed print element is treated outside the process of our invention with Color Developer Solution C (described in Example 2for 6 minutes, then the process is completed as described previously in this example.
  • the color reproduction of the original step tablet produced by color development outside our invention is unsatisfactory having only about 50 percent of the cyan and magenta dye image contrast needed.
  • Another sample of the exposed print element is treated in Developer Solution C for 12 minutes and the process completed as described previously in this example. Not only is the cyan and magenta dye image contrast still unacceptably low, but the cyan, magenta and yellow fog densities are very high and unacceptable.
  • Example 8 is repeated, but using a multilayer color photographic element element coated over a TiO -pigmented electron-bombarded polyethylene-coated paper support.
  • the support is stored about two hours after electron bombardment before the light-sensitive layers are coated on it.
  • Good color reproductions are obtained when the exposed element containing the very low silver chlorobromide content in the redsensitive and in the green-sensitive layers is color developed according to our invention and then either stop-fixed, bleached, harden-fixed and stabilized as described in Example 1 or bleach-fixed and stabilized as described in Example 4.
  • the process outside our invention gives unsatisfactory results.
  • EXAMPLE 10 Four samples of a multilayer color photographic element prepared as described in Example 9 are sensitometrically exposed as described in Example 2 and processed as described in Example 1 so that different samples are developed in Color Developer Solutions 2, 3, 4 and 5. Good color reproduction is obtained of the step tablet in each sample using our process, even though the very low amount of silver halide is used in the red-sensitive layer and the green-sensitive layer.
  • EXAMPLE 11 Five samples of multilayer color photographic element, prepared as described in Example 9, but containing a nondiffusible 5-pyrazolone magenta-fon'ning coupler of Lestina,
  • Example 9 is repeated, but a multilayer color photographic element is used having only about 312 mg of silver chlorobromide per m in the blue-sensitive layer of the element in Example 9. Good color reproductions are obtained when our process is used to color develop the exposed element, but unacceptable reproductions result when a process outside our invention is used.
  • EXAMPLE 13 A multilayer reflection photographic element is made like the element described in Example 9, except that the red-sensitive layer contains only about 102 mg of silver chlorobromide per m the green-sensitive layer contains only about 236 mg of silver chlorobromide per m and the blue-sensitive layer contains only about 247 mg of silver chlorobromide per m A sample of this element is sensitometrically exposed and developed with our process using Color Developer Solution 4 as described in Example I. A good color reproduction is produced in this element with our process.
  • Example 13 is repeated, but using only about 90 mg of silver chlorobromide per m instead of 102 mg/m in the red-sensitive layer, about 200 mg of silver chlorobromide per m in the green-sensitive layer, instead of 236 mg/m and about 215 mg of silver chlorobromide per m instead of 247 mg/m in the blue-sensitive layer. Our process produces a good color reproduction in this element.
  • Example 13 is repeated, but using a multilayer color reflection photographic element having about 69 mg of silver chlorobromide per m in the red-sensitive layer, about 166 mg of silver chlorobromide per m in the green-sensitive layer and about 178 mg of silver chlorobromide in the blue-sensitive layer.
  • Our process using Color Developer Solution 4 (described in Example 1) at 6 minutes and 30 C, produces useful color reproductions in this element. By extending the development time and/or raising the development temperature, the color reproduction is improved.
  • our color development process using a color developing agent of Formula 1, is used to advantage to develop useful color reproductions in exposed color reflection photographic elements containing as low as 65 mg of silver chlorobromide per m in at least the red-sensitive and green-sensitive emulsion layers by increasing the development time and/or developer temperature.
  • Our novel color development process provides a very valuable technical advance because it gives dyes having superior stability to prolonged exposure to heat and light, and advantageously produces good color reproduction in emulsions containing very low silver halide levels.
  • a color photographic process for treating an image-wise exposed multicolor reflection pl otog aphic element comprising an opaque white-pigmented support having coated thereon red, green and blue-sensitive silver halide emulsion layer containing nondiffusible cyan, magenta and yellowforming photographic couplers, respectively, which form nondiffusible dyes, at least said red and green-sensitive silver halide emulsions being each coated at silver coverages in the range of from about 65 mg/m to about 375 mg/m, which process comprises image-wise color developing said silver halide emulsions in an aqueous alkaline color developing composition containing a color developing agent having the formula:
  • n is an integer of 2 to 4; R is an alkyl group having one to four carbon atoms; and R is an alkyl group having one to four carbon atoms or an alkoxy group having one to four carbon atoms.
  • a color photographic process for treating an image-wise exposed multicolor reflection photographic element comprising an opaque white-pigmented support having coated thereon red, green and blue-sensitive silver halide emulsion layers containing nondiffusible cyan, magenta and yellowforming photographic couplers, respectively, which form nondiffusible dyes, at least said red and green-sensitive silver halide emulsions being each coated at silver coverages in the range of from about 65 mg/m to about 375 mg/m which process comprises image-wise color developing said silver halide emulsions in an aqueous alkaline color developing composition containing a color developing agent selected from the class consisting of N-ethyl-N-methoxyethyl-3-methyl-p-phenylenediamine, N-ethyl-N-methoxybutyl-3-methyl-p-phenylenediamine, N-ethyl-N-ethoxyethyl-3-methyl-p-phenylenediamine, N-ethy
  • n is an integer of 2 to 4; R is an alkyl group having one to four carbon atoms; and R is an alkyl group having one to four carbon atoms or an alkoxy group having one to four carbon atoms.
  • a color photographic process for treating an image-wise exposed multicolor reflection photographic element comprising an opaque white-pigmented support having coated thereon red, green and blue-sensitive silver halide emulsion layers containing nondiffusible cyan, magenta and yellowforming photographic couplers, respectively, which form nondiffusible dyes, at least said red and green-sensitive silver halide emulsions being each coated at silver coverages in the range of from about 65 mg/m to about 375 mg/m, which process comprises image-wise color developing said silver halide emulsions in an aqueous alkaline color developing composition containing N-ethyl-N-methoxyethyl-3-methyl-pphenylenediamine.
  • a color photographic procea for treating an image-wise exposed multicolor reflection photographic element comprising an opaque white-pigmented support having coated thereon red, green and blue-sensitive silver halide emulsion layers containing nondiifusible cyan, magenta and yellowforming photographic couplers, respectively, which form nondiffusible dyes, at least said red and green-sensitive silver halide emulsions being each coated at silver coverages in the range of from about 65 mg/m to about 375 mglm which process comprises image-wise color developing said silver halide emulsions in an aqueous alkaline color developing composition containing N-ethylN-methoxyethyl-3-n-propyl-pphenylenediamine.
  • a color photographic process for treating an image-wise exposed multicolor reflection photographic element comprising an opaque white-pigmented support having coated thereon red, green and blue-sensitive silver halide emulsion layers containing nondiffusible cyan, magenta and yellow forming photographic couplers, respectively, which form nondiffusible dyes, at least said red and green-sensitive silver halide emulsions being each coated at silver coverages in the range of from about 65 mg/m to about 375 mglm which process comprises image-wise color developing said silver halide emulsions in an aqueous alkaline color developing composition containing N-ethyl-N-methoxyethyl-3-methoxy-pphenylenediamine.

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Silver Salt Photography Or Processing Solution Therefor (AREA)
US94993A 1970-12-03 1970-12-03 Color photographic processes Expired - Lifetime US3656950A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US9499370A 1970-12-03 1970-12-03

Publications (1)

Publication Number Publication Date
US3656950A true US3656950A (en) 1972-04-18

Family

ID=22248409

Family Applications (1)

Application Number Title Priority Date Filing Date
US94993A Expired - Lifetime US3656950A (en) 1970-12-03 1970-12-03 Color photographic processes

Country Status (6)

Country Link
US (1) US3656950A (enrdf_load_stackoverflow)
BE (1) BE776263A (enrdf_load_stackoverflow)
CA (1) CA955101A (enrdf_load_stackoverflow)
CH (1) CH537600A (enrdf_load_stackoverflow)
DE (1) DE2159904A1 (enrdf_load_stackoverflow)
FR (1) FR2117268A5 (enrdf_load_stackoverflow)

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3816134A (en) * 1971-12-03 1974-06-11 Eastman Kodak Co Photographic color developing solutions containing p-toluenesulfonic acid salts of p-phenylenediamines
US3875227A (en) * 1973-02-23 1975-04-01 Hunt Chem Corp Philip A Alcoholates of orthophosphate salts of 4-amino, 3-methyl, N-ethyl, N-beta methanesulfonamidoethyl aniline
US3907875A (en) * 1971-12-03 1975-09-23 Eastman Kodak Co Di-p-toluenesulfonic acid salt of N-ethyl-N-methoxyethyl-3-methyl 1,4 benzenediamine
US3989526A (en) * 1973-11-28 1976-11-02 Eastman Kodak Company Processing compositions comprising inert transition metal complex oxidizing agents and reducing agents
US4002477A (en) * 1973-11-28 1977-01-11 Eastman Kodak Company Diffusion transfer processes and elements using or containing inert transitional metal complex oxidizing agents
US4035188A (en) * 1974-04-03 1977-07-12 Mitsubishi Paper Mills, Ltd. N-alkoxyethoxyethylphenylenediamine color developing agents
US4069053A (en) * 1971-03-18 1978-01-17 Konishiroku Photo Industry Co., Ltd. Photographic films
US4297438A (en) * 1978-08-01 1981-10-27 Agfa-Gevaert Aktiengesellschaft Color-photographic development process
US4298681A (en) * 1973-02-23 1981-11-03 Philip A. Hunt Chemical Corp. N,N Disubstituted p-phenylenediamine phosphates to form a color developer working solution, a color developer concentrate containing such a phosphate and a method of using said working solution for color development of color film
EP0202616A2 (en) 1985-05-16 1986-11-26 Konica Corporation Method for color-developing a silver halide photographic light-sensitive material
EP0204530A2 (en) 1985-05-31 1986-12-10 Konica Corporation Method for forming direct positive color image
JPH063537B2 (ja) 1985-06-18 1994-01-12 コニカ株式会社 直接ポジカラ−画像の形成方法
JPH0644141B2 (ja) 1985-05-16 1994-06-08 コニカ株式会社 ハロゲン化銀カラ−写真感光材料の処理方法

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4113491A (en) * 1975-02-10 1978-09-12 Konishiroku Photo Industry Co., Ltd. Color photographic developing composition

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2163166A (en) * 1936-05-27 1939-06-20 Agfa Ansco Corp Photographic developer
US2304953A (en) * 1941-08-08 1942-12-15 Eastman Kodak Co Photographic developer
US2552242A (en) * 1948-03-06 1951-05-08 Eastman Kodak Co p-phenylenediamines containing n-alkylacetamido ethyl substituent
US2592363A (en) * 1947-05-23 1952-04-08 Eastman Kodak Co P-phenylenediamine developer containing nu-alkylacetamido ethyl substituent
US2603657A (en) * 1951-05-05 1952-07-15 Du Pont N-alkyl-n-(sulfophenylthio) alkylaminoanilines
US2716132A (en) * 1952-10-22 1955-08-23 Du Pont N-substituted amino anilines
US3134673A (en) * 1960-02-19 1964-05-26 Ilford Ltd Photographic developers
US3265502A (en) * 1961-06-21 1966-08-09 Gevert Photo Producten N V Photographic developing compositions

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2163166A (en) * 1936-05-27 1939-06-20 Agfa Ansco Corp Photographic developer
US2304953A (en) * 1941-08-08 1942-12-15 Eastman Kodak Co Photographic developer
US2592363A (en) * 1947-05-23 1952-04-08 Eastman Kodak Co P-phenylenediamine developer containing nu-alkylacetamido ethyl substituent
US2552242A (en) * 1948-03-06 1951-05-08 Eastman Kodak Co p-phenylenediamines containing n-alkylacetamido ethyl substituent
US2603657A (en) * 1951-05-05 1952-07-15 Du Pont N-alkyl-n-(sulfophenylthio) alkylaminoanilines
US2716132A (en) * 1952-10-22 1955-08-23 Du Pont N-substituted amino anilines
US3134673A (en) * 1960-02-19 1964-05-26 Ilford Ltd Photographic developers
US3265502A (en) * 1961-06-21 1966-08-09 Gevert Photo Producten N V Photographic developing compositions

Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4069053A (en) * 1971-03-18 1978-01-17 Konishiroku Photo Industry Co., Ltd. Photographic films
US3907875A (en) * 1971-12-03 1975-09-23 Eastman Kodak Co Di-p-toluenesulfonic acid salt of N-ethyl-N-methoxyethyl-3-methyl 1,4 benzenediamine
US3816134A (en) * 1971-12-03 1974-06-11 Eastman Kodak Co Photographic color developing solutions containing p-toluenesulfonic acid salts of p-phenylenediamines
US3875227A (en) * 1973-02-23 1975-04-01 Hunt Chem Corp Philip A Alcoholates of orthophosphate salts of 4-amino, 3-methyl, N-ethyl, N-beta methanesulfonamidoethyl aniline
US4298681A (en) * 1973-02-23 1981-11-03 Philip A. Hunt Chemical Corp. N,N Disubstituted p-phenylenediamine phosphates to form a color developer working solution, a color developer concentrate containing such a phosphate and a method of using said working solution for color development of color film
US4002477A (en) * 1973-11-28 1977-01-11 Eastman Kodak Company Diffusion transfer processes and elements using or containing inert transitional metal complex oxidizing agents
US3989526A (en) * 1973-11-28 1976-11-02 Eastman Kodak Company Processing compositions comprising inert transition metal complex oxidizing agents and reducing agents
US4035188A (en) * 1974-04-03 1977-07-12 Mitsubishi Paper Mills, Ltd. N-alkoxyethoxyethylphenylenediamine color developing agents
US4297438A (en) * 1978-08-01 1981-10-27 Agfa-Gevaert Aktiengesellschaft Color-photographic development process
EP0202616A2 (en) 1985-05-16 1986-11-26 Konica Corporation Method for color-developing a silver halide photographic light-sensitive material
US4738917A (en) * 1985-05-16 1988-04-19 Konishiroku Photo Industry Co., Ltd. Method for color-developing a silver halide photographic light-sensitive material with a color developer containing an n-hydroxyalkyl-p-phenylenediamine derivative
AU590563B2 (en) * 1985-05-16 1989-11-09 Konishiroku Photo Industry Co., Ltd. Method for color-developing a silver halide color photographic light-sensitive material
JPH0644141B2 (ja) 1985-05-16 1994-06-08 コニカ株式会社 ハロゲン化銀カラ−写真感光材料の処理方法
EP0204530A2 (en) 1985-05-31 1986-12-10 Konica Corporation Method for forming direct positive color image
AU588878B2 (en) * 1985-05-31 1989-09-28 Konishiroku Photo Industry Co., Ltd. Method for forming direct positive color image
JPH063537B2 (ja) 1985-06-18 1994-01-12 コニカ株式会社 直接ポジカラ−画像の形成方法

Also Published As

Publication number Publication date
FR2117268A5 (enrdf_load_stackoverflow) 1972-07-21
DE2159904A1 (de) 1972-06-22
BE776263A (fr) 1972-06-05
CH537600A (fr) 1973-05-31
CA955101A (en) 1974-09-24

Similar Documents

Publication Publication Date Title
US3617291A (en) Two-equivalent couplers for photography
US3265506A (en) Yellow forming couplers
US3034892A (en) Magenta-colored cyan-forming couplers
US3658525A (en) Reversal color photographic processes
US2956879A (en) Filter and absorbing dyes for use in photographic emulsions
US3656950A (en) Color photographic processes
JPS5814671B2 (ja) カラ−写真感光材料
US3984246A (en) Antihalation and filter dyes for photographic materials
US3516831A (en) Multicolor photographic elements containing both 4-equivalent and 2-equivalent color-forming couplers
US3128182A (en) Silver halide solvent containing developers and process
US4513081A (en) Silver halide photographic emulsion
US2933391A (en) Photographic emulsions containing 5-pyrazolone coupler compounds
US3547640A (en) Multicolor photographic elements
USRE27848E (en) We length in millimicrons
US3850638A (en) Benzimidazole nucleating agents
US3622328A (en) Process for producing photographic color images
US4552837A (en) Silver halide photographic emulsions
US4517284A (en) Light-sensitive silver halide photographic material
JPS62178251A (ja) ハロゲン化銀写真感光材料の処理方法
US2688538A (en) Photographic elements and process of color correction utilizing styryl dyes as couplers
US3480434A (en) Sensitizer for blue-sensitive emulsions
US5658718A (en) Silver halide color photographic elements
JPH0365528B2 (enrdf_load_stackoverflow)
US5658717A (en) Silver halide color photographic elements
US3498787A (en) Rapid dye-bleach photographic process and element comprising dye-developers