US3674490A - Process for the production of photographic images - Google Patents

Process for the production of photographic images Download PDF

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Publication number
US3674490A
US3674490A US881610A US3674490DA US3674490A US 3674490 A US3674490 A US 3674490A US 881610 A US881610 A US 881610A US 3674490D A US3674490D A US 3674490DA US 3674490 A US3674490 A US 3674490A
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Prior art keywords
brown
black
silver
color
compounds
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US881610A
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English (en)
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Reinhart Matejec
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Agfa Gevaert AG
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Agfa Gevaert AG
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Priority claimed from DE19681813920 external-priority patent/DE1813920C/de
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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
    • G03C5/00—Photographic processes or agents therefor; Regeneration of such processing agents
    • G03C5/26—Processes using silver-salt-containing photosensitive materials or agents therefor
    • G03C5/40—Chemically transforming developed images
    • G03C5/42—Reducing; Intensifying
    • 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
    • G03C1/00—Photosensitive materials
    • G03C1/50—Compositions containing noble metal salts other than silver salts, as photosensitive substances
    • 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
    • G03C1/00—Photosensitive materials
    • G03C1/705—Compositions containing chalcogenides, metals or alloys thereof, as photosensitive substances, e.g. photodope systems
    • 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
    • G03C5/40—Chemically transforming developed images
    • 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
    • G03C5/40—Chemically transforming developed images
    • G03C5/46—Toning

Definitions

  • noble metal compounds are photochemically decomposed to form gold nuclei.
  • the noble metal compounds are preferably salts of the noble metals with organic acids such as citric acid, tartaric acid, oxalic acid, salicylic acid, lactic acid, benzoic acid, mucic acid, etc., as well as halides, cyanides, thiocyanates and the like. See, for example, the relevant chapter in the work by J. Plotnikow Allegemeiue Photochemie, publishers W. de Gruyter & Co., Berlin- für, (1936), and the work by A.
  • Layers which are particularly suitable are those which contain zinc oxide or titanium dioxide embedded in any binders but in particular in hydrophilic binders, such as silica gel, polyvinyl acetate, partially hydrolysed polyvinyl acetate, polyvinyl alcohol, cellulose esters, carbonymethyl cellulose or natural binders such as gelatin.
  • hydrophilic binders such as silica gel, polyvinyl acetate, partially hydrolysed polyvinyl acetate, polyvinyl alcohol, cellulose esters, carbonymethyl cellulose or natural binders such as gelatin.
  • the noble metal compounds are added to these layers before or after exposure.
  • the noble metal compounds need not themselves to be light-sensitive.
  • the noble metal compounds are reduced in the exposed areas of the layers so that noble metal nuclei which are capable of catalytically decomposing peroxy compounds are formed in imagewise distribution.
  • the process of the invention exhibits particular utility for intensifying conventional photographic silver images which have been produced with conventional silver halide emulsion layers and in particular images in layers of this type which have a low silver content.
  • the imagewise exposed silver salt emulsion layer is first developed in a conventional way.
  • the silver image thus formed is capable of the catalytically decomposing the peroxy compound.
  • the catalytic activity of the surface of the developed silver image may be still further increased by taking suitable measures after development and before treatment with the peroxy compound.
  • Such increases in the catalytic activity of the developed silver image may be achieved, for example, by depositing traces of catalytically more active noble metals (e.g. Au, Pt, Pd, Ru, Os) on the surface of the image silver or by brief oxidative pretreatment of the image silver, for example with peroxy compounds preferably inorganic peroxy compounds, e.g. with dissolved or gaseous H 0 dissolved perborate, percarbonate or the like.
  • noble metals e.g. Au, Pt, Pd, Ru, Os
  • a certain increase in the catalytic activity of the developed image silver also occurs if additional silver ions are deposited on the surface of the silver image from the solution phase by brief physical after-development.
  • the silver surface is then purified by displacement of adsorbed, inactivating substances (e.g. emulsion stabilizers), and its catalytic activity is increased.
  • a low sensitivity fine grained silver halide emulsion layer which upon conventional processing has a sensitivity of about 13 DIN can be exposed as an emulsion with a sensitivity of 20 D'IN if processed according to the present invention, without any loss of details or density in the resulting image.
  • the gain in photographic sensitivity by the process of the invention is particularly high if silver salt emulsion layers with the conventional higher silver content are used.
  • images of high density and contrast can be obtained also using light-sensitive silver salt emulsion layers especially silver halide gelatin emulsion layers which have a silver content of only about 0.05-0.3 gram silver per square meter in the form of light-sensitive silver salt. Apart from the considerable economic advantage this leads to images of exceptionally high sharpness because light scattering in layers having a low silver halide content is reduced as compared with conventional silver halide layers, which have a much higher silver halide content.
  • the fixing or bleach fixing process can be omitted for layers which have an extremely low silver halide content since the photolytic coloration in daylight of layers which have an exceptionally low silver content is much less than that of conventional layers which have a much higher silver content.
  • the process of the invention can be performed with silver salt emulsion layers of common composition, for example silver halide, gelatin emulsion layers, which however may contain as already mentioned above for less silver salts.
  • the silver salt emulsion layers used for the process of the present invention may contain the usual additives such as spectral or chemical sensitizers, accelerators, stabilizers, hardening agents, wetting agents, and so on.
  • the process according to the invention may be used both for intensifying black-white silver images and for intensifying color photographic images.
  • Peroxy compounds which are suitable for the process according to the invention are preferably inorganic peroxy compounds, e.g. hydrogen peroxide, perborates, percarbonates or persulfates, the last mentioned peroxy compounds preferably in the form of their alkali metal salts.
  • Organic peroxy compounds, e.g. benzoyl peroxide, may also be used.
  • the treatment with the peroxy compounds is perrformed in the presence of reagents which yield very deeply colored oxidation products so that the image which was previously invisible or hardly visible becomes clearly visible.
  • These reagents may be organic compounds which yield an image dye on oxidation, preferably (1) amino and/or hydroxy substituted aryl compounds, in particular those of the benzene or naphthalene series or (2) amino and/or hydroxy substituted heterocyclic aromatic compounds, such as 5- or 6-membered heterocyclic rings, in particular rings with nitrogen as a ring member, for example rings of the pyrol, pyridine, pyrazole, imidazole, triazole, pyridazine, pyrimidine or pyrazine series, whereby these heterocyclic rings contain anellated benzene rings, such as indol, indazole, quinazoline, quinoxazaline, acridine or phenazine.
  • the compounds are preferably water soluble.
  • amino, hydroxy or aminohydroxy compounds may also be substituted, e.g. with halogen, sulfonic, alkyl, aryl, alkoxy or aroxy nitro, keto, aldehyde groups, carboxy or carbamoyl.
  • mixtures of several such compounds show a much stronger dye formation on oxidation than the individual components.
  • a mixture of o-phenylenediamine and pyrocatechol results in increased dye formation.
  • a mixture of N,N-diethyl-phenylenediamine and pyrocatechol yields a deeper and more neutral black dye than the individual compounds.
  • Even components which do not form a dye upon oxidation on their own, such as tetrabromohydroquinone or tetrabromopyrocatechol may enhance dye formation when added to other hydroxy, amino or aminohydroxy compounds.
  • Oxidation of the aromatic amino, hydroxy and/ or aminohydroxy compounds yields monomeric or polymeric dyes which are related to quinonimines and azines.
  • dye precursors Apart from dye precursors, one may, of course, also use leuco dye compounds and vat dyes which can be oxidized to dyes.
  • leuco dye compounds and vat dyes which can be oxidized to dyes.
  • Oxidisable organic compounds of the type which yield the image dye only in a sequence of reactions with other compounds are also suitable for use in the process of the invention.
  • any reaction system which yields dyes on oxidative coupling may be used.
  • Special reference may be made here to the so-called color-forming photographic developers of the phenylenediamine or aminopyrazolone series (see, e.g. C. E. K. Mees and T. H. James, The Theory of the Photographic Process," 3rd edition, MacMillan Co., New York (1966), page 382; H. R. Schweizer, Kiinstliche Organische Farbstofie und Struktur, Springer-Verlag, Berlin-Gottingen-Heidelberg (1964), page 295).
  • Isocyclic and heterocyclic hydrazines can also be coupled oxidatively with suitable components to yield dyes ,(see e.g. H. Hiinig et al., Angew. Chem. 70 (1958) 215; S. Hiinig, Chimia 15 (1961) 133 and Angew. Chem. 74 (1962) 818).
  • the color-forming photographic developed substances are catalytically oxidized on the imagewise distributed noble metal nuclei or noble metal particles by the peroxy compounds. Their oxidation products may then react with known photographic color couplers which are also present to form dyes.
  • Any color couplers are suitable for this purpose, for example those of the phenol or naphthol series as cyan couplers, those of the pyrazolone indazol series as magenta couplers and those of the benzoyl-acetanilide series as yellow couplers.
  • EXAMPLE 1 A gelatin layer (thickness of layer 25 m.) on a cellulose trlacetate support is treated with a saturated aqueous solution Of Na [Pd (C204) 2] 5 After drying and imagewise exposure with ultraviolet light, the layer is treated for two minutes at 20 C. in the following developer bath:
  • Solution 1 5 cc. of glacial acetic acid are added to 500 cc. of water. 3 g. of S-aminobenzidene hydrochloride and 2 g. of pyrocatechol are then dissolved in this solution.
  • Solution 2 10 g. of sodium acetate are dissolved in 500 cc. of water. 25 cc. of 30% aqueous H are then added.
  • the two solutions are mixed before use.
  • Nuclei of palladium metal are formed on the exposed areas of the layer during exposure. On development, these nuclei catalytically decompose the hydrogen peroxide present in solution 2 and the amine and phenol of solution 1 are imagewise oxidized to yield a brownish-black negative image of the original. The image dye is fast to diffusion.
  • EXAMPLE 2 A transparent support of cellulose triacetate is coated with a solution which contains 6 ml. of a 10% aqueous solution of polyvinyl alcohol and 2 g. of TiO of particle size 0.3 to 0.4 m. and 0.1 mg. of erythrosin as spectral sensitizer in 400 cc. of water. The layer is then dried.
  • the dry layer is exposed in a sensitometer customarily used in the art behind a grey step wedge and then treated for 10 minutes with a aqueous solution of NaAuCl It is then washed and treated for 2 minutes in a bath of the following solutions at 20 C.
  • the three solutions are mixed before use.
  • the developed material is washed for half a minute and dried. A blue-violet negative image of the original is obtained.
  • a silver iodobromide gelatin emulsion layer (4.5 mols percent of Agl) which must be as free as possible from fog, is applied onto a support of polyethylene terephthalate. Conventional silver content of about g. silver per square meter. Layer thickness approximately 10 After imagewise exposure (0.5 second with X-rays between fluorescent intensifying foils), the layer is treated for 5 minutes in the following developer at 20 C.:
  • the layer is treated for 5 minutes in a solution which contains 25 g. of sodium percarbonate and 200 cc. of 30% aqueous H 0 in 1 liter of H 0.
  • the catalytic activity of the surface of the developed silver is thus increased.
  • the layer is then treated for 2 minutes in the following bath:
  • Solution 1 10 g. of pyrocatechol in 200 ml. water.
  • Solution 2 10 g. of 1,7-dihydroxy naphthalene in 800 ml. water and added thereto 20 g. of sodium carbonate and 20 ml. of a S-N-sodium-hydroxide solution.
  • Solultion 3 14 g. sodium perborate in 1 liter of water.
  • the layer is finally rinsed and dried.
  • the treatment with the last-mentioned bath may be performed in daylight.
  • the contrast of the original silver image is greatly enhanced by the after treatment.
  • the sensitivity of the material is apparently also strongly increased since one either obtains much more image detail for the same exposure followed by conventional photographic processing or the exposure time required to obtain the same quality of final image is much less (factor 10 to 100) than would be required if exposure were followed by conventional photographic processing.
  • the intermediate treatment may be carried out e.g. with a 2% aqueous sodium perborate solution, a 1% aqueous PdCl solution, a 1% aqueous PtCl solution or a 1% aqueous AuCl solution.
  • a brief treatment with gaseous H 0 at a temperature of about C. also increases the catalytic activity of the image silver.
  • EXAMPLE 4 10 ml. of a silver bromide gelatin emulsion which is as free as possible from fog are added to 250 cc. of a 5% gelatin solution. 50 ml. of a 10% aqueous solution of the cyan color coupler:
  • the layer After drying, the layer is exposed in a sensitometer for 1 second behind a grey step wedge and then treated with a color-forming developer for 2 minutes in the conventional manner in the following bath:
  • the layer is then treated for 5 minutes in a solution which contains 20 g. of sodium perborate and cc. of 30% H 0 to 1 liter of H 0.
  • the catalytic activity of the silver image surface is thereby increased.
  • the layer is then treated for 5 minutes in the following bath:
  • Solution 1 15 g. of phenylhydrazine-2-sulfonic acid sodium are dissolved in 500 cc. of 0.1% aqueous acetic acid.
  • Solution 2 7 g. of sodium perborate and 40 g. of sodium acetate are dissolved in 500 cc. of water. 50 cc. of 30% of H are then added.
  • the above layer is arranged between two intensifying foils of calcium tungstate and exposed to X-rays behind The two Solutions? mixed befPre a stepwedge of aluminum. Thereafter the exposed layer i cyan Image consldefably Increased is developed for one minute at a temperature of 20 C. tensity by this after treatment.
  • phenylhydrazme-3- with the following developing bath: sulfonic acid sodium instead of the phenylhydrazine-Z- sulfonic acid sodium a red image is obtained.
  • EXAMPLE 5 Fixation is not necessary since the coloration by photo- Acolor photographic lti-l d t i l hi h lytic formation of silver in the low silver halide content prises a red-sensitive silver halide emulsion layer conlayer p exposure to y t 1S neghgrbletaining a cyan color coupler, a green-sensitive silver halide Afte?
  • development layer 18 "Ff 2 mmutes 1n emulsion layer containing a magenta coupler, a filter 20 a Solution of the followlng composltlon: layer containing tartrazine as yellow filter dye, and a blue- 50 f 30% aqueous H202 sensitive silver halide emulsion layer containing a yellow 20 of Sodium perborate (or g. Sodium percarbonate), coupler 1s exposed behmd a grey step wedge a sodium carbonate to adjust a pH-value of 10, water up light intensity which is about one-tenth of the amount reto 1 liter quired for conventional processing.
  • Sodium perborate or g. Sodium percarbonate
  • the material is then 25 developed for 8 minutes in the conventional manner in Thereafter the layer 15 contacted Y a the color-forming developer of Example 4. mg s fa F i f comams a $9
  • the layer is treated three times in succession for 1 ppm] is e m e O owmg a 6 or m com minute each alternately with a 2.5% sodium percanbonate 22223 gg jg g fig g g i eacih i solution and the color development solution indicated 30 Per liter p e s e ea g soulon 223:1: gi t; i i ii r iie i gig 1s mtenslfied by this alter.
  • a high speed silver bromo iodide gelatin emulsion con- The dye forming oxidation process can be stopped and taining 10% by weight of silver halide, silver iodide the image can be stabilized for storage by aftertreatment content 1 mol percent is applied onto a cellulose triwith an aqueous solution of Na SO NaHSO or acetate support and dried.
  • the emulsion layer contains formaldehydebisulfite.
  • Brownish black Brownish black

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Silver Salt Photography Or Processing Solution Therefor (AREA)
  • Non-Silver Salt Photosensitive Materials And Non-Silver Salt Photography (AREA)
US881610A 1968-12-11 1969-12-02 Process for the production of photographic images Expired - Lifetime US3674490A (en)

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DE19681813920 DE1813920C (de) 1968-12-11 Verfahren zur Herstellung photo graphischer Bilder

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JP (1) JPS4946419B1 (enrdf_load_stackoverflow)
BE (1) BE742768A (enrdf_load_stackoverflow)
CH (1) CH538711A (enrdf_load_stackoverflow)
FR (1) FR2025918A1 (enrdf_load_stackoverflow)
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Cited By (32)

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Publication number Priority date Publication date Assignee Title
US3765890A (en) * 1970-11-17 1973-10-16 Agfa Gevaert Ag Organic hydrogen peroxide addition compounds for vesicular image formation processes
US3841873A (en) * 1973-05-21 1974-10-15 Eastman Kodak Co Cobalt (iii) complex amplifier baths in color photographic processes
JPS5116023A (ja) * 1974-07-12 1976-02-09 Konishiroku Photo Ind Harogenkaginshashinkankozairyono shorihoho
JPS5136136A (ja) * 1974-09-21 1976-03-26 Konishiroku Photo Ind Harogenkaginshashinkankozairyo no shorihoho
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
DE2709054A1 (de) * 1976-03-02 1977-09-08 Fuji Photo Film Co Ltd Verfahren zur erzeugung von bildern durch bildverstaerkung
DE2736886A1 (de) * 1976-08-18 1978-03-02 Konishiroku Photo Ind Verfahren zum behandeln lichtempfindlicher farbphotographischer silberhalogenid-aufzeichnungsmaterialien
US4089685A (en) * 1975-11-05 1978-05-16 Eastman Kodak Company Reversal imaging process including redox amplification
US4094682A (en) * 1975-10-24 1978-06-13 Konishiroku Photo Industry Co., Ltd. Method for processing light-sensitive silver halide photographic material
US4113490A (en) * 1974-07-12 1978-09-12 Konishiroku Photo Industry Co., Ltd. Method for processing light-sensitive silver halide photographic materials
US4126461A (en) * 1977-06-13 1978-11-21 Eastman Kodak Company Black-and-white photographic elements and processes
US4146395A (en) * 1976-10-08 1979-03-27 Eastman Kodak Company Reversal imaging process including redox amplification
US4158565A (en) * 1978-02-02 1979-06-19 Eastman Kodak Company Processes for producing positive or negative dye images using high iodide silver halide emulsions
US4200466A (en) * 1975-09-30 1980-04-29 Konishiroku Photo Industry Co., Ltd. Light-sensitive silver halide photographic materials
US4203767A (en) * 1974-12-16 1980-05-20 Konishiroku Photo Industry Co., Ltd. Amplification process for light-sensitive color photographic material
US4254213A (en) * 1979-02-06 1981-03-03 Konishiroku Photo Industry Co., Ltd. Process for forming black dye images
US4268616A (en) * 1978-03-06 1981-05-19 Fuji Photo Film Co., Ltd. Process for forming photographic images
US4371609A (en) * 1980-07-19 1983-02-01 Konishiroku Photo Industry Co., Ltd. Forming method of a dye image
EP0124795A2 (en) 1983-04-11 1984-11-14 Fuji Photo Film Co., Ltd. Silver halide photographic emulsion
US4678740A (en) * 1985-04-29 1987-07-07 Catania James N Method for making photographic mattes
US5171658A (en) * 1989-04-26 1992-12-15 Eastman Kodak Company Method of photographic processing
US5244778A (en) * 1990-01-18 1993-09-14 Eastman Kodak Company Thiosulphate fixing solutions
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
US5380639A (en) * 1991-08-23 1995-01-10 Konica Corporation Silver halide color photographic material
US5411848A (en) * 1993-08-16 1995-05-02 Eastman Kodak Company Photographic color couplers and photographic materials containing them
US5418117A (en) * 1993-07-24 1995-05-23 Eastman Kodak Company Method of photographic processing
US5466562A (en) * 1993-07-30 1995-11-14 Eastman Kodak Company Method of photographic processing
US5477301A (en) * 1993-04-13 1995-12-19 Eastman Kodak Company Photographic processing apparatus
US5689753A (en) * 1995-06-22 1997-11-18 Eastman Kodak Company Method of photographic processing with solution replenishment
US5719010A (en) * 1995-12-16 1998-02-17 Eastman Kodak Company Treatment method for treating effluents from a photographic development process
US5736306A (en) * 1994-12-24 1998-04-07 Eastman Kodak Company Photographic silver halide material having improved spectral characteristics
US5747230A (en) * 1994-12-24 1998-05-05 Eastman Kodak Company Photographic silver halide colour material having improved granularity and dye hue

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US4526860A (en) * 1983-07-28 1985-07-02 Minnesota Mining And Manufacturing Company Photographic process
GB9008750D0 (en) * 1990-04-18 1990-06-13 Kodak Ltd Method and apparatus for photographic processing solution replenishment
GB9016472D0 (en) * 1990-07-26 1990-09-12 Kodak Ltd Photographic bleach compositions
GB9022779D0 (en) * 1990-10-19 1990-12-05 Kodak Ltd Photographic processing apparatus
GB9022781D0 (en) * 1990-10-19 1990-12-05 Kodak Ltd Photographic processing apparatus
GB9024783D0 (en) * 1990-11-14 1991-01-02 Kodak Ltd Method of processing a photographic silver halide colour material
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GB9114933D0 (en) * 1991-07-11 1991-08-28 Kodak Ltd Method for forming a photographic colour image
GB9118299D0 (en) * 1991-08-24 1991-10-09 Kodak Ltd Method of photographic processing
US5702873A (en) * 1991-12-03 1997-12-30 Eastman Kodak Company Redox amplification solutions containing metal ion sequestering agents
GB9126386D0 (en) * 1991-12-12 1992-02-12 Kodak Ltd Method of making stable colour photographic prints
GB9423381D0 (en) 1994-11-19 1995-01-11 Kodak Ltd Photographic developer/amplifier compositions
GB9423382D0 (en) 1994-11-19 1995-01-11 Kodak Ltd Photographic developer/amplifier compositions
GB9516578D0 (en) 1995-08-12 1995-10-11 Kodak Ltd Method of processing photographic silver halide materials
GB9600112D0 (en) 1996-01-04 1996-03-06 Kodak Ltd Improvements in or relating to photographic processsing apparatus

Cited By (33)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3765890A (en) * 1970-11-17 1973-10-16 Agfa Gevaert Ag Organic hydrogen peroxide addition compounds for vesicular image formation processes
US3841873A (en) * 1973-05-21 1974-10-15 Eastman Kodak Co Cobalt (iii) complex amplifier baths in color photographic processes
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
JPS5116023A (ja) * 1974-07-12 1976-02-09 Konishiroku Photo Ind Harogenkaginshashinkankozairyono shorihoho
US4113490A (en) * 1974-07-12 1978-09-12 Konishiroku Photo Industry Co., Ltd. Method for processing light-sensitive silver halide photographic materials
JPS5136136A (ja) * 1974-09-21 1976-03-26 Konishiroku Photo Ind Harogenkaginshashinkankozairyo no shorihoho
US4203767A (en) * 1974-12-16 1980-05-20 Konishiroku Photo Industry Co., Ltd. Amplification process for light-sensitive color photographic material
US4200466A (en) * 1975-09-30 1980-04-29 Konishiroku Photo Industry Co., Ltd. Light-sensitive silver halide photographic materials
US4094682A (en) * 1975-10-24 1978-06-13 Konishiroku Photo Industry Co., Ltd. Method for processing light-sensitive silver halide photographic material
US4089685A (en) * 1975-11-05 1978-05-16 Eastman Kodak Company Reversal imaging process including redox amplification
DE2709054A1 (de) * 1976-03-02 1977-09-08 Fuji Photo Film Co Ltd Verfahren zur erzeugung von bildern durch bildverstaerkung
DE2736886A1 (de) * 1976-08-18 1978-03-02 Konishiroku Photo Ind Verfahren zum behandeln lichtempfindlicher farbphotographischer silberhalogenid-aufzeichnungsmaterialien
US4277556A (en) * 1976-08-18 1981-07-07 Konishiroku Photo Industry Co., Ltd. Process for treating light-sensitive silver halide color photographic materials
US4146395A (en) * 1976-10-08 1979-03-27 Eastman Kodak Company Reversal imaging process including redox amplification
US4126461A (en) * 1977-06-13 1978-11-21 Eastman Kodak Company Black-and-white photographic elements and processes
US4158565A (en) * 1978-02-02 1979-06-19 Eastman Kodak Company Processes for producing positive or negative dye images using high iodide silver halide emulsions
US4268616A (en) * 1978-03-06 1981-05-19 Fuji Photo Film Co., Ltd. Process for forming photographic images
US4254213A (en) * 1979-02-06 1981-03-03 Konishiroku Photo Industry Co., Ltd. Process for forming black dye images
US4371609A (en) * 1980-07-19 1983-02-01 Konishiroku Photo Industry Co., Ltd. Forming method of a dye image
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Also Published As

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BE742768A (enrdf_load_stackoverflow) 1970-06-08
CH538711A (de) 1973-06-30
GB1268126A (en) 1972-03-22
JPS4946419B1 (enrdf_load_stackoverflow) 1974-12-10
FR2025918A1 (enrdf_load_stackoverflow) 1970-09-11
DE1813920A1 (de) 1970-06-25

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