Silver Bleach Or Bleach-fix Patents (Class 430/393)
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Patent number: 8637228Abstract: A color photographic element has a reflective support and a blue light sensitive color record, a green light sensitive color record, and a red light sensitive color record and can be used to provide color photographic prints. The element also has a non-light sensitive layer over the red light sensitive color record. This non-light sensitive layer has (1) a hydrophilic colloid in an amount of at least 200 mg/m2 to and including 2,000 mg/m2, (2) matte particles, and (3) an acrylate latex polymer having latex particles having an average size of less than 1 ?m and a glass transition temperature of at least 70° C. The dry weight ratio of the acrylate latex polymer to the hydrophilic colloid is at least 0.8:1 and the dry weight ratio of the acrylate latex polymer to the total matte particles is at least 15:1.Type: GrantFiled: November 8, 2012Date of Patent: January 28, 2014Assignee: Kodak Alaris Inc.Inventors: Jess B. Hendricks, III, Paul L. Zengerle, Andrew D. Church, Darrell B. Austin
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Patent number: 7150962Abstract: A method for forming images on a silver halide color photographic photosensitive material having a substrate and photographic structural layers thereon, including at least three silver halide color photosensitive layers having different photosensitive regions, respectively, and at least one non-photosensitive hydrophilic colloid layer, is disclosed. At least one of the photosensitive layers contains 90 mol % or more of silver chloride. Shortly after the silver halide color photographic photosensitive material has been scan-exposed with laser beams, the material is rapid-processed with a low replenishing amount.Type: GrantFiled: January 18, 2006Date of Patent: December 19, 2006Assignee: Fuji Photo Film Co., Ltd.Inventors: Naoto Ohshima, Akito Yokozawa, Naoya Shibata
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Patent number: 6958208Abstract: Photographic processing of color photographic materials can be carried out using polyphosphonic acids or salts thereof in acidic “stop” solutions or wash solutions after color development. When used in acidic stop solutions, the polyphosphonic acid is preferably carried over into the bleaching solution to provide added stability of the bleaching agent. The acidic stop solutions can also include organic thiols that are used as bleaching accelerators when carried over into the bleaching solutions.Type: GrantFiled: October 30, 2003Date of Patent: October 25, 2005Assignee: Eastman Kodak CompanyInventors: Shirleyanne E. Haye, Janet M. Huston
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Patent number: 6919170Abstract: The present invention relates to methods useful for processing a color photographic material. A method of manufacturing a ferric 1,3-PDTA complex is provided. The method includes reacting ferrous bromide with unchelated 1,3-PDTA, thereby forming a ferrous 1,3-PDTA complex; and conducting an oxidation process wherein the ferrous 1,3-PDTA complex is converted to the ferric 1,3-PDTA complex. Also provided is a method of processing a silver halide color photographic material.Type: GrantFiled: February 28, 2002Date of Patent: July 19, 2005Assignee: Fuji Hunt Photographic Chemicals, Inc.Inventor: Haixing Wan
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Patent number: 6828084Abstract: A photographic bleaching composition has reduced odor and acceptable storage stability. It comprises an iron-ligand complex bleaching agent, a rehalogenating agent, and a phthalic acid or salt thereof. This bleaching composition can be used in various photographic processing protocols to provide color images from color photographic silver halide materials, especially photographic color papers. The bleaching step can also be preceded by an acidic stop that also includes a phthalic acid or salt thereof.Type: GrantFiled: October 27, 2003Date of Patent: December 7, 2004Assignee: Eastman Kodak CompanyInventors: Shirleyanne E. Haye, Janet M. Huston, Eric R. Schmittou, Therese M. Feller
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Patent number: 6824965Abstract: A bleach or bleach/fixing solution for processing photographic silver halide materials which, relative to the silver halide content of the unprocessed material, exhibit prior to the bleaching step a content of silver arising from development of at least 65 mol %, in particular for processing color reversal materials, characterized in that the solution contains at least one iron complex of propylenediaminetetraacetic acid or of &bgr;-alaninediacetic acid or a mixture of these complexes and the total concentration of the stated iron complexes in the solution is at least 0.045 and at most 0.25 mol/l and a process for processing, in which such a solution is used, is characterized by a small introduced quantity of iron complexes, a low residual silver content, a low bleaching fog value, elevated resistance to precipitation and in that the bleach solution may be rejuvenated.Type: GrantFiled: August 1, 2001Date of Patent: November 30, 2004Assignee: AGFA-GevaertInventors: Ralf Wichmann, Thomas Hübsch, Thomas Stetzer
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Publication number: 20040197714Abstract: Silver is recovered from aqueous silver-bearing compositions such as seasoned photographic bleach-fixing compositions or other photoprocessing effluent that comprise certain aliphatic or aromatic sulfur-containing compounds that include a —N═C(SH)— group. The presence of these compounds in the silver-bearing compositions provides effective silver recovery, extended life for the silver recovery apparatus, and reduced maintenance.Type: ApplicationFiled: April 23, 2004Publication date: October 7, 2004Applicant: Eastman Kodak CompanyInventors: Paul A. Schwartz, Valerie L. Kuykendall, Leif P. Olson, Susan M. Flavin, Dominick Vacco, Dennis M. Long, Jay E. Mathewson
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Publication number: 20040185390Abstract: Stable, single-part photographic bleach-fixing “precursor” compositions comprise one or more iron-ligand complexes, one or more thiosulfates as the sole fixing agents, and optionally, a sulfite preservative. At least 50 mol % of the iron in the composition is in the form of Fe(II). This composition can be used directly in photoprocessing, or used as a regenerator when mixed with bleach-fixing overflow to provide a replenishing solution. Because the Fe(II) compounds are precursor bleaching agents, they must be oxidized to Fe(III) for active bleaching prior to or during the photographic processing operations.Type: ApplicationFiled: January 28, 2004Publication date: September 23, 2004Inventors: Sheridan E. Vincent, Valerie L. Kuykendall, Jean M. Buongiorne
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Patent number: 6790600Abstract: A method of processing photographic color papers is carried out using a photographic bleach-fixing composition in a bleach-fixing step that is carried out for less than 60 seconds. The bleach-fixing composition comprises certain aliphatic or aromatic sulfur-containing compounds that include a —N═C(SH)—group. The bleach-fixing composition can be prepared from a two-part bleach-fixing kit having two solutions that can be added directly to a processing chamber or premixed to form a replenisher solution.Type: GrantFiled: February 7, 2003Date of Patent: September 14, 2004Assignee: Eastman Kodak CompanyInventors: Paul A. Schwartz, Valerie L. Kuykendall, Eric R. Schmittou, Leif P. Olson, Susan M. Flavin
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Publication number: 20040157172Abstract: A method of processing photographic color papers is carried out using a photographic bleach-fixing composition in a bleach-fixing step that is carried out for less than 60 seconds. The bleach-fixing composition comprises certain aliphatic or aromatic sulfur-containing compounds that include a —N═C(SH)— group. The bleach-fixing composition can be prepared from a two-part bleach-fixing kit having two solutions that can be added directly to a processing chamber or premixed to form a replenisher solution.Type: ApplicationFiled: February 7, 2003Publication date: August 12, 2004Applicant: Eastman Kodak CompanyInventors: Paul A. Schwartz, Valerie L. Kuykendall, Eric R. Schmittou, Leif P. Olson, Susan M. Flavin
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Publication number: 20040137383Abstract: The invention provides a method of photographic processing, comprising the steps of applying a first component of a processing solution to the surface of a silver halide photographic material to be processed and applying a second component of the processing solution to the surface of photographic material to be processed. When the applied first and second components have mixed together, the processing solution is active to oxidise silver in the photographic material. The invention also provides a photographic processor suitable for carrying out the method.Type: ApplicationFiled: March 15, 2004Publication date: July 15, 2004Applicant: Eastman Kodak CompanyInventor: John R. Fyson
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Publication number: 20040110100Abstract: The invention provides a method of photographic processing, comprising the step of applying a layer of a catalyst to the surface of a developed silver halide photographic material to promote aerial oxidation of silver within the photographic material. The catalyst promotes aerial oxidation of silver enabling a reduction in the amount of chemistry required.Type: ApplicationFiled: November 5, 2003Publication date: June 10, 2004Applicant: Eastman Kodak CompanyInventor: John R. Fyson
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Publication number: 20040110102Abstract: A concentrated bleach-fixer composition for a silver halide color photographic material is disclosed, comprising an aminopolycarboxylic acid iron complex and a thiosulfate, wherein the bleach-fixer composition further comprises at least one compound selected from a phosphate salt, polyphosphate salt, an imidazole compound and a diaminotriazine compound; and the aminopolycarboxylic acid iron complex having a Fe(II) ratio of not less than 50 mol %.Type: ApplicationFiled: December 1, 2003Publication date: June 10, 2004Applicant: Konica Minolta Holdings, Inc.Inventors: Satoshi Okano, Kouki Kawashima
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Publication number: 20040086810Abstract: A photographic bleaching composition has reduced odor and acceptable storage stability. It comprises an iron-ligand complex bleaching agent, a rehalogenating agent, and a phthalic acid or salt thereof. This bleaching composition can be used in various photographic processing protocols to provide color images from color photographic silver halide materials, especially photographic color papers. The bleaching step can also be preceded by an acidic stop that also includes a phthalic acid or salt thereof.Type: ApplicationFiled: October 27, 2003Publication date: May 6, 2004Inventors: Shirleyanne E. Haye, Janet M. Huston, Eric R. Schmittou, Therese M. Feller
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Publication number: 20040072109Abstract: A silver halide color photographic photosensitive material comprising, on a reflective support, at least one yellow-coloring photosensitive silver halide emulsion layer, at least one magenta-coloring photosensitive silver halide emulsion layer, at least one cyan-coloring photosensitive silver halide emulsion layer and at least one non-photosensitive, non-coloring hydrophilic colloid layer. Reflective density A(&lgr;) at a wavelength &lgr; at an unexposed portion of the material after a color development treatment is 0.08 or less for 450 nm, 0.10 or less for 550 nm, and 0.08 or less for 650 nm. Alternatively, chromaticity at the unexposed portion of the material after the color development treatment satisfies the condition: 91≦L*≦96, 0≦a*≦2.0, −9.0≦b*≦−3.0. Also provided is a process for forming an image using the silver halide color photographic photosensitive material.Type: ApplicationFiled: September 4, 2003Publication date: April 15, 2004Applicant: FUJI PHOTO FILM CO., LTD.Inventors: Toshiyuki Makuta, Shin Soejima, Hiroyuki Yoneyama
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Publication number: 20040063044Abstract: A photographic bleaching composition has reduced odor and acceptable storage stability. It comprises an iron-ligand complex bleaching agent, a rehalogenating agent, and a phthalic acid or salt thereof. This bleaching composition can be used in various photographic processing protocols to provide color images from color photographic silver halide materials, especially photographic color papers. The bleaching step can also be preceded by an acidic stop that also includes a phthalic acid or salt thereof.Type: ApplicationFiled: September 27, 2002Publication date: April 1, 2004Applicant: Eastman Kodak CompanyInventors: Shirleyanne E. Haye, Janet M. Huston, Eric R. Schmittou, Therese M. Feller
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Publication number: 20040058283Abstract: A one-part photographic bleach-fixing concentrate containing an iron(III) complex salt, a thiosulphate and a sulphite, a disulphite or a sulphinic acid, remains stable if a phosphate, polyphosphate or polyphosphonate, or a nitrate or bromide is added thereto.Type: ApplicationFiled: September 23, 2003Publication date: March 25, 2004Inventors: Gustav Tappe, Wolfgang Korner
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Publication number: 20040038158Abstract: An image forming method including a step of imagewise exposing a silver halide color photographic photosensitive material having, on a support, photographic constituent layers including at least one blue sensitive silver halide emulsion layer, at least one green sensitive silver halide emulsion layer, at least one red sensitive silver halide emulsion layer, and at least one non-photosensitive hydrophilic colloid layer, a color developing step, a bleach-fixing step and a rinsing step. At least one of the at least one red sensitive silver halide emulsion layer contains at least one compound represented by the following general formula (IA) and/or at least one coupler represented by the following general formulae (PTA-I) and (PTA-II).Type: ApplicationFiled: April 23, 2003Publication date: February 26, 2004Applicant: FUJI PHOTO FILM CO., LTD.Inventors: Shin Soejima, Kentaro Okazaki
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Publication number: 20040023167Abstract: A concentrated blix solution composition, which can remarkably reduce the replenishing amount of the blix solution and/or remarkably reduce the blix time, comprises: 1) a concentrated composition part containing a bleaching agent; and 2) a concentrated composition part containing a fixing agent, wherein the part concentrated composition 1) satisfies all the following conditions: (1) pH is from 2.0 to 3.5, (2) a specific gravity is 1.130 or more, (3) the bleaching agent comprises an iron(III) complex salt of an aminopolycarboxylic acid, (4) a concentration of the bleaching agent is from 0.5 to 1.0 mole/L, and (5) a content of an aminopolycarboxylic acid having not been complexed is from 0.1 to 3% by mole based on the bleaching agent, and a processing process using the same.Type: ApplicationFiled: July 18, 2003Publication date: February 5, 2004Applicant: FUJI PHOTO FILM CO., LTD.Inventor: Kazuaki Yoshida
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Patent number: 6670108Abstract: This invention relates to a method for processing a silver halide color photographic material comprising the steps of loading the material into a chamber adapted to hold the material therein; introducing a measured amount of a color developer solution into the chamber; developing the photographic material with the color developer solution; introducing into the chamber a measured amount of a processing solution which arrests development, without removing the color developer solution, to form a developer/stop solution mixture; processing the photographic material with the developer/stop solution mixture, substantially removing all of the developer/stop mixture solution from the chamber; then providing in the chamber a bleach/fixer solution mixture comprising a bleaching agent and a fixing agent; and processing the photographic material with the bleach/fixer solution mixture; wherein the color developer solution is utilized in the amount of greater than or equal to 375 ml/m2 of the photographic material that isType: GrantFiled: December 19, 2002Date of Patent: December 30, 2003Assignee: Eastman Kodak CompanyInventor: Eric R. Schmittou
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Publication number: 20030228545Abstract: A one-part photographic bleach-fixing concentrate including an iron (III) complex salt of an aminopolycaroxylic acid in an amount of 0.3 to 0.6 mol/l and a fixing agent, a ratio of ammonium ions to the total cationic ions being 0 to 50 mol %.Type: ApplicationFiled: May 8, 2003Publication date: December 11, 2003Inventor: Tomoya Oda
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Publication number: 20030224300Abstract: A photographic processing composition for silver halide color photographic lightsensitive material, comprising at least one compound represented by the formula (I):Type: ApplicationFiled: June 18, 2003Publication date: December 4, 2003Applicant: FUJI PHOTO FILM CO., LTD.Inventors: Makoto Suzuki, Yasufumi Nakai, Yoshiharu Yabuki
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Patent number: 6638697Abstract: A method of processing a silver halide color photographic material comprises the steps of color-developing an image-wise exposed silver halide color photographic material and subjecting the developed material to desilvering in a processing bath having a fixing function and containing a thiosulfate compound and the following compound or analogue thereof in a molar ratio of 1/0.05 to 1/0.30. In this process, the fixing speed is extremely high even when the replenishing rate is low and the processed photosensitive material has an excellent resistance to fading by light.Type: GrantFiled: November 9, 1995Date of Patent: October 28, 2003Assignee: Fuji Photo Film Co., Ltd.Inventors: Takatoshi Ishikawa, Tetsuro Kojima, Masaru Yoshikawa
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Publication number: 20030198902Abstract: A photographic processing composition, containing at least one compound of formula (I) or (II):Type: ApplicationFiled: January 24, 2003Publication date: October 23, 2003Inventors: Makoto Suzuki, Yasufimi Nakai
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Publication number: 20030190560Abstract: A photographic bleach-fixing composition has reduced odor and acceptable storage stability. It comprises an iron-ligand complex bleaching agent, thiosulfate fixing agent, sulfite ions, and a phthalic acid or salt thereof. This bleach-fixing composition can be used in various photographic processing protocols to provide color images from color photographic silver halide materials.Type: ApplicationFiled: March 27, 2003Publication date: October 9, 2003Inventors: Shirleyanne E. Haye, Janet M. Huston, Eric R. Schmittou, Therese M. Feller
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Publication number: 20030118956Abstract: A photographic bleach-fixing composition for a color photographic processing system in which bleach-fixing is carried out in a bleach-fixing bath that is replenished with a replenishing solution, wherein the photographic bleach-fixing composition comprises:Type: ApplicationFiled: September 5, 2002Publication date: June 26, 2003Applicant: KONICA CORPORATIONInventor: Kenji Ishida
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Patent number: 6582893Abstract: Stable, single-part photographic bleach-fixing “precursor” compositions comprise one or more iron-ligand complexes, one or more thiosulfates as the sole fixing agents, and optionally, a sulfite preservative. At least 50 mol % of the iron in the composition is in the form of Fe(II). This composition can be used directly in photoprocessing, or used as a regenerator when mixed with bleach-fixing overflow to provide a replenishing solution. Because the Fe(II) compounds are precursor bleaching agents, they must be oxidized to Fe(III) for active bleaching prior to or during the photographic processing operations.Type: GrantFiled: April 3, 2002Date of Patent: June 24, 2003Assignee: Eastman Kodak CompanyInventors: Sheridan E. Vincent, Valerie L. Kuykendall, Jean M. Buongiorne
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Publication number: 20030054298Abstract: A photographic processing composition for silver halide color photographic lightsensitive material, comprising at least one compound represented by the formula (I):Type: ApplicationFiled: March 29, 2002Publication date: March 20, 2003Applicant: FUJI PHOTO FILM CO., LTD.Inventors: Makoto Suzuki, Yasufumi Nakai, Yoshiharu Yabuki
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Patent number: 6534253Abstract: Photographic bleach-fixing solutions in a processing chamber can be directly replenished using a single-part photographic bleach-fixing “precursor” composition that comprises one or more iron-ligand complexes, one or more thiosulfates as the sole fixing agents, and optionally, a sulfite preservative. At least 50 mol % of the iron in the composition is in the form of Fe(II). Immediately prior to or during directly supplying the precursor composition to the processing chamber from an enclosed container, sufficient ferrous ions are converted to ferric ions to provide desired bleaching in the processing chamber.Type: GrantFiled: November 15, 2001Date of Patent: March 18, 2003Assignee: Eastman Kodak CompanyInventors: Valerie L. Kuykendall, Sheridan E. Vincent, Daniel R. English
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Publication number: 20020192604Abstract: A method of processing a silver halide color photographic material comprises the steps of color-developing an image-wise exposed silver halide color photographic material and subjecting the developed material to desilvering in a processing bath having a fixing function and containing a thiosulfate compound and the following compound or analogue thereof in a molar ratio of 1/0.05 to 1/0.30. In this process, the fixing speed is extremely high even when the replenishing rate is low and the processed photosensitive material has an excellent resistance to fading by light.Type: ApplicationFiled: November 9, 1995Publication date: December 19, 2002Inventors: TAKATOSHI ISHIKAWA, TETSURO KOJIMA, MASARU YOSHIKAWA
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Patent number: 6489089Abstract: A method of bleaching and fixing a developed silver halide color negative element comprising mixing a bleaching solution containing an oxidizing agent with a fixing solution containing a silver ion solubilizing agent to form a bleach-fixing solution; shortly after or simultaneously with said mixing, bleach/fixing the silver halide element by contacting it with the bleach/fixing solution; and discarding the bleach/fixing solution after one use; wherein the bleach/fixing step is performed at an elevated temperature; and wherein the silver halide color negative element comprises a silver bromoiodide emulsion with an average iodide content of more than 1 mol % iodide.Type: GrantFiled: November 3, 2000Date of Patent: December 3, 2002Assignee: Eastman Kodak CompanyInventors: Eric R. Brown, John R. Fyson
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Patent number: 6482579Abstract: Color negative photographic elements can be effectively processed to provide negative color images using bleaching or bleach-fixing compositions in which the primary bleaching agent is a ferric complex of 1,3-propylenediaminetetraacetic acid or a salt thereof. Any potential precipitation of the bleaching agent is inhibited by the presence of at least 0.005 mol/l of an organic polyphosphonic acid, an aminopolysuccinic acid, or a polycarboxylic acid containing at least one hydroxy group as a compound. This compound can be added directly to the bleaching or bleach-fixing composition or introduced from carryover from a previous photoprocessing step.Type: GrantFiled: February 5, 2001Date of Patent: November 19, 2002Assignee: Eastman Kodak CompanyInventors: Jon A. Kapecki, Harry J. Price, David M. Braitsch
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Patent number: 6440653Abstract: A method of producing a photographic image in an imagewise exposed photographic material comprising one or more silver halide emulsion layers comprises developing the material with a developer solution containing a silver halide developing agent, applying to the surface of the developed material a solution of a sulphite compound that reacts with oxidised developing agent and prevents further development, and applying to the surface of the developed material a solution of an oxidant that oxidises any remaining developing agent, wherein said sulphite compound is present in an amount sufficient to react with all the oxidised developing agent and said solutions of sulphite and oxidant are applied to the material by means other than immersion in a tank.Type: GrantFiled: May 10, 2001Date of Patent: August 27, 2002Assignee: Eastman Kodak CompanyInventors: John R. Fyson, Louis E. Friedrich
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Publication number: 20020081535Abstract: A method of delivering processing solution to a processing device wherein the processing solutions are provided within sealed members fixedly arranged on a movable web. The web moves relative to the processing area and the sealed members are ruptured when the processing solution within is required.Type: ApplicationFiled: December 5, 2001Publication date: June 27, 2002Applicant: Eastman Kodak CompanyInventor: Peter J. Twist
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Publication number: 20020051947Abstract: Color reversal photographic elements can be effectively processed to provide positive color images using bleaching compositions in which the primary bleaching agent is a ferric complex of 1,3-propylenediaminetetraacetic acid or a salt thereof. Any potential precipitation of the bleaching agent is inhibited by the presence of at least 0.005 mol/l of an organic polyphosphonic acid, an aminopolysuccinic acid, or a polycarboxylic acid containing at least one hydroxy group as a compound. This compound can be added directly to the bleaching composition or introduced from carryover from a previous photoprocessing step, such as a prebleaching step using color reversal processing.Type: ApplicationFiled: August 30, 2001Publication date: May 2, 2002Inventors: Harry J. Price, William G. Henry
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Patent number: 6376161Abstract: An image information recording method is disclosed. The method comprises the steps of imagewise exposed to light a silver halide photographic light-sensitive material comprising a support having thereon a light-sensitive layer comprising light-sensitive silver halide and a coupler, color developing the image wise exposed silver halide photographic light-sensitive material, converting the image information formed on the silver halide photographic light-sensitive material to electric information while the light-sensitive material is wetted without a drying and at least a part of developed silver is remained in the light-sensitive material, and recording the image information on another recording medium according as electric image information.Type: GrantFiled: March 7, 2001Date of Patent: April 23, 2002Assignee: Konica CorporationInventors: Yoshiko Iwai, Shigeto Hirabayashi
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Patent number: 6365332Abstract: Color reversal photographic elements can be effectively processed to provide positive color images using bleaching compositions in which the primary bleaching agent is a ferric complex of 1,3-propylenediaminetetraacetic acid or a salt thereof. Any potential precipitation of the bleaching agent is inhibited by the presence of at least 0.005 mol/l of an organic polyphosphonic acid, an aminopolysuccinic acid, or a polycarboxylic acid containing at least one hydroxy group as a compound. This compound can be added directly to the bleaching composition or introduced from carryover from a previous photoprocessing step, such as a prebleaching step using color reversal processing.Type: GrantFiled: September 7, 2000Date of Patent: April 2, 2002Assignee: Eastman Kodak CompanyInventors: Harry J. Price, William G. Henry
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Publication number: 20020037482Abstract: A bleach or bleach/fixing solution for processing photographic silver halide materials which, relative to the silver halide content of the unprocessed material, exhibit prior to the bleaching step a content of silver arising from development of at least 65 mol %, in particular for processing color reversal materials, characterized in that the solution contains at least one iron complex of propylenediaminetetraacetic acid or of &bgr;-alaninediacetic acid or a mixture of these complexes and the total concentration of the stated iron complexes in the solution is at least 0.045 and at most 0.25 mol/l and a process for processing, in which such a solution is used, is characterized by a small introduced quantity of iron complexes, a low residual silver content, a low bleaching fog value, elevated resistance to precipitation and in that the bleach solution may be rejuvenated.Type: ApplicationFiled: August 1, 2001Publication date: March 28, 2002Inventors: Ralf Wichmann, Thomas Hubsch, Thomas Stetzer
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Patent number: 6197483Abstract: Color photographic silver halide materials, especially color photographic papers, are processed effectively with reduced iron retention after bleaching with a biodegradable bleaching composition. Bleaching is accomplished using an iron chelate of a biodegradable chelating ligand in the presence of a polyphosphonic acid. This bleaching step is followed by fixing using a fixing composition that includes a fixing agent and a polycarboxylic acid.Type: GrantFiled: December 18, 1998Date of Patent: March 6, 2001Assignee: Eastman Kodak CompanyInventors: Carl A. Marrese, Alaine M. Gray, David G. Foster
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Patent number: 6187518Abstract: The present invention is a photographic element which includes a support, at least one silver halide emulsion superposed on a front side of the support and an outermost backing layer superposed on a backside of the support. The outermost backing layer is composed of a hydrophobic binder and a hydrophilic binder wherein the backing layer has an advancing water contact angle of 70 or greater and a receding water contact angle of at least 40 less than the advancing water contact angle.Type: GrantFiled: October 23, 1998Date of Patent: February 13, 2001Assignee: Eastman Kodak CompanyInventors: Raymond T. Jones, Ravi Sharma, Alfred B. Fant
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Patent number: 6174653Abstract: A method of forming a color photographic image comprises: contacting an imagewise exposed color photographic material with a color developing composition to provide a developed material, and contacting the developed material with a bleach-fix composition. This composition is a bleaching agent comprising of a complex of ferric ion and an aminopolycarboxylic acid, a fixing agent; and sulphite ion in an amount up to 0.1 mol/l; said bleach-fix composition having a pH from about 4 to about 8 and said contacting being for a period from about 5 to about 20 seconds.Type: GrantFiled: October 12, 1999Date of Patent: January 16, 2001Assignee: Eastman Kodak CompanyInventor: Nigel R. Wildman
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Patent number: 6156488Abstract: A method of processing an imagewise exposed photographic silver halide material which includes a redox amplification dye image-forming step and a bleach step using an aqueous solution of hydrogen peroxide or a compound capable of releasing hydrogen peroxide.Type: GrantFiled: June 17, 1994Date of Patent: December 5, 2000Assignee: Eastman Kodak CompanyInventors: Peter Douglas Marsden, John Richard Fyson
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Patent number: 6153364Abstract: Specific aromatic compounds having an extended planar .pi. system are useful as spectral sensitizing dye stain reducing agents in photographic processing compositions and methods for providing color or black-and-white images in various photographic silver halide materials. These compounds are devoid of diaminostilbene fragments or fused triazole nuclei. They are particularly useful in fixing and bleaching compositions in the processing of color photographic silver halide materials, but can be used in various other processing compositions.Type: GrantFiled: December 16, 1999Date of Patent: November 28, 2000Assignee: Eastman Kodak CompanyInventors: Ramanuj Goswami, Harry J. Price, Mary E. Craver
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Patent number: 6136516Abstract: A process for processing exposed photographic silver halide materials at least comprising the stages color development, stopping, bleaching and fixing using a bleaching bath with hydrogen peroxide as the active substance, characterized in that the stop bath contains as a buffer agent at least one carboxylic acid of the formulae I to VIII ##STR1## in which R.sub.1 to R.sub.5 mutually independently mean hydrogen, --OH, --COOM, --SO.sub.3 M, --PO(OM).sub.2, an optionally substituted alkyl residue, an optionally substituted aryl residue, an optionally substituted amino residue or a heterocyclic residue andM means hydrogen or an alkali metal atom and wherein at least one further acid group is present in the molecule, ##STR2## and at least one agent which stops development, is distinguished by improved bleaching action and the use of an environmentally friendly bleaching bath.Type: GrantFiled: May 26, 1999Date of Patent: October 24, 2000Assignee: Agfa-Gevaert N.V.Inventors: Thomas Fogel, Jurgen Gohmann, Norman Klaunzer
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Patent number: 6103458Abstract: There is disclosed a method for processing a silver halide color photographic light-sensitive material, which comprises processing a silver halide color photographic light-sensitive material that contains a color-forming reducing agent, with an alkaline solution that is substantially free from any color-developing agent, and then processing the light-sensitive material with a bleach-fix solution that contains a ferric complex salt of a compound represented by formula (I) or (II): ##STR1## wherein, in formula (I), R.sub.1 represents a hydrogen atom, or an aliphatic hydrocarbon, aryl, or heterocyclic group; L.sub.1 and L.sub.2 each represent an alkylene group; and M.sub.1 and M.sub.2 each represent a hydrogen atom or a cation; and wherein, in formula (II), R.sub.21, R.sub.22, R.sub.23, and R.sub.24 each represent a hydrogen atom, or an aliphatic hydrocarbon, aryl, heterocyclic, hydroxyl, or carboxyl group; t and u are each 0 or 1; W represents a divalent carbon-containing linking group; and M.sub.21, M.sub.Type: GrantFiled: July 31, 1997Date of Patent: August 15, 2000Assignee: Fuji Photo Film Co., Ltd.Inventor: Hiroyuki Seki
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Patent number: 6096487Abstract: Cyan dye density can be maximized in color developed silver halide photographic color materials and bleaching accelerated by contacting the materials with a bleaching or bleach-fixing composition comprising a mixture of a ferric complex of an aminopolycarboxylic acid as a bleaching agent, and an aromatic pyridinyl mono- or dicarboxylic acid in uncomplexed form. The molar ratio of the uncomplexed aromatic carboxylic acid to the ferric ion in the bleaching composition is from about 0.02:1 to about 0.8:1.Type: GrantFiled: March 2, 1999Date of Patent: August 1, 2000Assignee: Eastman Kodak CompanyInventor: David G. Foster
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Patent number: 6077650Abstract: Color photographic elements can be effectively processed to provide color images using biodegradable bleaching compositions in which the bleaching agent includes a pyridinecarboxylic acid or 2,6-pyridinedicarboxylic acid chelating ligand. The bleaching composition is stabilized by incorporation of an organic amine base instead of the conventional inorganic base.Type: GrantFiled: June 28, 1999Date of Patent: June 20, 2000Assignee: Eastman Kodak CompanyInventor: Harry J. Price
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Patent number: 6040122Abstract: A bleaching bath for processing photographic silver halide materials with hydrogen peroxide as the active substance, characterised in that it contains at least one organic compound having a sulfinic acid function and a further functional group with free electron pairs, is distinguished by improved bleaching action and makes it possible to achieve continuous processing of hard to bleach photographic materials having an elevated silver content.Type: GrantFiled: May 25, 1999Date of Patent: March 21, 2000Assignee: Agfa Gevaert NVInventors: Thomas Fogel, Jurgen Gohmann, Norman Klaunzer
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Patent number: 6015653Abstract: A method for processing a transparent silver halide color photographic material is disclosed. The transparent silver halide photographic light-sensitive material is treated with a processing solution containing a compound represented by Formula (I).Formula I ##STR1## wherein Q is a group of atoms necessary for forming a nitrogen-containing heterocyclic ring (including one condensed with a 5- or 6-member unsaturated ring), R.sub.11 is a hydrogen atom, an alkali metal atom, ##STR2## or an alkyl group, Q' is a synonym for Q.sub.1. After the treating, a ratio (E/G) of a light absorbance E of unexposed area of the light-sensitive material at 650 nm to an amount of silver G mg/m.sup.2 remaining in the light-sensitive material is within the range of from 3.0.times.10.sup.-4 to 1.5.times.10.sup.-3 in the silver halide photogrpahic light-sensitive material,A transparent silver halide color photographic material is also disclosed.Type: GrantFiled: April 26, 1999Date of Patent: January 18, 2000Assignee: Konica CorporationInventors: Manabu Nakahanada, Wataru Satake
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Patent number: 6013424Abstract: Color photographic silver halide elements, such as color films, can be rapidly fixed using a fixing composition containing a thiosulfate fixing agent, and certain aminoalkyl- and sulfur-substituted 1,2,4-triazoles. Each of the components is present in specific amounts to effect rapid and efficient desilvering. The composition also includes predominantly ammonium cations (at least 50 mol %). Besides effective and rapid silver removal (less than 60 seconds), the fixing composition also minimizes residual dye stain from sensitizing dye aggregates within the photographic elements.Type: GrantFiled: February 16, 1999Date of Patent: January 11, 2000Assignee: Eastman Kodak CompanyInventors: Eric R. Schmittou, David G. Foster