Bleach Or Intensification Patents (Class 430/461)
  • Publication number: 20080050681
    Abstract: Aimed at improving balance between refractive index and absorbance of an immersion fluid used for light exposure based on the immersion method, the immersion fluid is configured as containing a deuterated dialkyl sulfoxide.
    Type: Application
    Filed: August 24, 2007
    Publication date: February 28, 2008
    Applicant: NEC ELECTRONICS CORPORATION
    Inventor: Toshirou Itani
  • Patent number: 7108962
    Abstract: A photographic processing composition, containing at least one compound of formula (I) or (II): A1-X-L-Y-A2??(I) wherein A1 and A2 each are a specific aryl or aromatic heterocyclic group; L is a specific arylene or divalent aromatic heterocyclic group; X and Y each are a specific divalent group; the compound of (I) contains at least two of —SO3M or —CO2M, but not contains —N?N— or —SH; M is a hydrogen, alkali or alkali earth metal, ammonium, or pyridinium; wherein A11 is a specific tri- or tetra-valent aromatic hydrocarbon or aromatic heterocyclic group; A12 is an aryl or aromatic heterocyclic group; X1 is a divalent group; M1 is a hydrogen, alkali or alkali earth metal, ammonium, or pyridinium; the molecule of (II) does not contain —N?N— or —SH; n is 3 or 4; r and s each are 0 to 10, (r+s) is 2 or more.
    Type: Grant
    Filed: January 24, 2003
    Date of Patent: September 19, 2006
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Makoto Suzuki, Yasufimi Nakai
  • Patent number: 6906215
    Abstract: There is provided a powdery S,S-EDDS iron complex improved in its caking property. An S,S-ethylenediamine-N,N?-disuccinic acid iron complex, which is crystalline and has an average particle diameter of from 10 to 1000 ?m and a water content of not more than 7% by weight, a powdery S,S-ethylene-N,N?-disuccinic acid (S,S-EDDS) iron complex having a compressive strength of not more than 1 kg/cm2, the compressive strength being measured according to JIS A 1108 after a lapse of 2 months under conditions of a temperature of 50° C. and a load of 300 g/cm2, and a process for producing the same.
    Type: Grant
    Filed: April 28, 2000
    Date of Patent: June 14, 2005
    Assignee: Mitsubishi Rayon Co., Ltd.
    Inventors: Shigeho Tanaka, Hiroyasu Banba, Kiyonobu Niwa
  • Patent number: 6852477
    Abstract: A composition for photographic bleaching contains a peracid bleaching agent such as a peroxide, persulfate, or periodate, and a cyclicaminomethanediphosphonic acid or a salt thereof as a stabilizing compound. This bleaching composition can also include a fixing agent, and can be used to provide color photographic images in various color photographic materials.
    Type: Grant
    Filed: October 22, 2003
    Date of Patent: February 8, 2005
    Assignee: Eastman Kodak Company
    Inventors: Shirleyanne E. Haye, Janet M. Huston
  • Patent number: 6838233
    Abstract: 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: Grant
    Filed: March 3, 2004
    Date of Patent: January 4, 2005
    Assignee: Eastman Kodak Company
    Inventors: Paul A. Schwartz, Valerie L. Kuykendall, Eric R. Schmittou, Leif P. Olson, Susan M. Flavin
  • Publication number: 20040171506
    Abstract: A composition for photographic bleaching contains a peracid bleaching agent such as a peroxide, persulfate, or periodate, and a cyclicaminomethanediphosphonic acid or a salt thereof as a stabilizing compound. This bleaching composition can also include a fixing agent, and can be used to provide color photographic images in various color photographic materials.
    Type: Application
    Filed: October 22, 2003
    Publication date: September 2, 2004
    Inventors: Shirleyanne E. Haye, Janet M. Huston
  • Publication number: 20040086810
    Abstract: 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: Application
    Filed: October 27, 2003
    Publication date: May 6, 2004
    Inventors: Shirleyanne E. Haye, Janet M. Huston, Eric R. Schmittou, Therese M. Feller
  • Publication number: 20040063044
    Abstract: 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: Application
    Filed: September 27, 2002
    Publication date: April 1, 2004
    Applicant: Eastman Kodak Company
    Inventors: Shirleyanne E. Haye, Janet M. Huston, Eric R. Schmittou, Therese M. Feller
  • Patent number: 6703192
    Abstract: A composition for photographic bleaching contains a peracid bleaching agent such as a peroxide, persulfate, or periodate, and a cyclicaminomethanediphosphonic acid or a salt thereof as a stabilizing compound. This bleaching composition can also include a fixing agent, and can be used to provide color photographic images in various color photographic materials.
    Type: Grant
    Filed: February 28, 2003
    Date of Patent: March 9, 2004
    Assignee: Eastman Kodak Company
    Inventors: Shirleyanne E. Haye, Janet M. Huston
  • Publication number: 20030228545
    Abstract: 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: Application
    Filed: May 8, 2003
    Publication date: December 11, 2003
    Inventor: Tomoya Oda
  • Publication number: 20030203324
    Abstract: A color image forming method is disclosed, comprising exposing a silver halide color photographic material and developing the exposed photographic material at 43 to 180° C. to form a color image, wherein when the photographic material is exposed so that the light-sensitive layer has a transmission density of a minimum density plus 0.1, the light-sensitive layer comprises dye-clouds having an average diameter of 3.0 to 20.0 &mgr;m. There is also disclosed a digital image forming process, wherein image recording information of the photographic material which was formed by use of the color image forming method is converted to digital image information through an image sensor.
    Type: Application
    Filed: March 26, 2003
    Publication date: October 30, 2003
    Inventors: Noriyuki Kokeguchi, Hiroyuki Hoshino, Hiromoto Ii
  • Publication number: 20030198902
    Abstract: A photographic processing composition, containing at least one compound of formula (I) or (II):
    Type: Application
    Filed: January 24, 2003
    Publication date: October 23, 2003
    Inventors: Makoto Suzuki, Yasufimi Nakai
  • Publication number: 20030087207
    Abstract: A method for preparing a kit part of a bleach-fixing solution or a kit of a bleaching solution for use in silver halide color photographic materials is disclosed, comprising (a) adding a [S,S]-alkylenediamine-N,N′-disuccinic acid or its salt into a mixing tank to form a solution, and then, (b) adding thereto at least one iron(III) salt selected from the group consisting of iron(III) nitrate, iron(III) chloride, iron(III) bromide, (M1)3Fe(III) (SO4)3 and M1Fe(III) (SO4)2.
    Type: Application
    Filed: April 3, 2002
    Publication date: May 8, 2003
    Applicant: KONICA CORPORATION
    Inventor: Satoru Kuse
  • Publication number: 20030054298
    Abstract: A photographic processing composition for silver halide color photographic lightsensitive material, comprising at least one compound represented by the formula (I):
    Type: Application
    Filed: March 29, 2002
    Publication date: March 20, 2003
    Applicant: FUJI PHOTO FILM CO., LTD.
    Inventors: Makoto Suzuki, Yasufumi Nakai, Yoshiharu Yabuki
  • Patent number: 6518002
    Abstract: An effective, biodegradable photographic bleaching solution comprises, as a bleaching agent, a ferric alkyliminodiacetic acid complex, and a particular organic phosphonic or phosphinic acid as an anti-rust agent. This anti-rust agent reduces or eliminates the formation of iron hydroxide in the processing solutions following the bleaching step, and further improves bleaching effectiveness.
    Type: Grant
    Filed: February 6, 1997
    Date of Patent: February 11, 2003
    Assignee: Eastman Kodak Company
    Inventor: David G. Foster
  • Patent number: 6500606
    Abstract: A photographic prebleaching or conditioning composition is useful for providing color positive images in color reversal photographic materials. This composition includes at least 0.0001 mol/l of a cyclic mercapto bleach accelerating agent and at least 0.0001 mol/l of a water-soluble or water-dispersible 2,6-diarylaminotriazine or diaminostilbene dye stain reducing agent. The amounts of the dye stain reducing agent and bleach accelerating agents are determined according to the following equation: [bleach accelerating agent, mol/l]≧0.01−10[dye stain reducing agent, mol/l].
    Type: Grant
    Filed: February 13, 2001
    Date of Patent: December 31, 2002
    Assignee: Eastman Kodak Company
    Inventors: Harry J. Price, Michael P. Youngblood, Ramanuj Goswami
  • Patent number: 6468722
    Abstract: A cartridge that supplies fresh photographic processing solution or chemistry to a photoprocessing machine and recovers silver from spent processing solution. The cartridge is designed to integrate a solution supply system and a silver recovery system to facilitate the collection of silver from spent processing solution, form a less-regulated spent solution and reduce chemical exposures to operators of photoprocessing systems.
    Type: Grant
    Filed: March 30, 2001
    Date of Patent: October 22, 2002
    Assignee: Eastman Kodak Company
    Inventors: Robert B. Call, Jay E. Mathewson, Donna M. Timmons, Richard R. Horn
  • Publication number: 20020142253
    Abstract: A cartridge that supplies fresh photographic processing solution or chemistry to a photoprocessing machine and recovers silver from spent processing solution. The cartridge is designed to integrate a solution supply system and a silver recovery system to facilitate the collection of silver from spent processing solution, form a less-regulated spent solution and reduce chemical exposures to operators of photoprocessing systems.
    Type: Application
    Filed: March 30, 2001
    Publication date: October 3, 2002
    Applicant: Eastman Kodak Company
    Inventors: Robert B. Call, Jay E. Mathewson, Donna M. Timmons, Richard R. Horn
  • Publication number: 20020090581
    Abstract: An aqueous photographic bleach solution comprises, as primary oxidant, in a concentration eg from about 0.1 to about 1 Molar of a transition metal oxidizing agent and, as secondary oxidant, from about 0.03 to about 0.15 Molar of a persulphate or from about 0.1 to about 0.8 Molar of a peroxide. The primary oxidant is preferably a ferric complex of an aminopolycarboxylic acid such as ethylene diamine tetraacetic acid (EDTA), propylene diamine tetraacetic acid (PDTA), diethylene triamine pentaacetic acid (DTPA), or a substituted imino diacetic acid such as methyl imino diacetic acid (MIDA). The peroxide can be provided by a compound that liberates peroxide under the bleach conditions. The solutions of the invention are particularly suitable for use with a single use surface application device in which a small volume of the solution is used once and then discarded.
    Type: Application
    Filed: October 3, 2001
    Publication date: July 11, 2002
    Applicant: Eastman Kodak Company
    Inventors: Peter J. Twist, John R. Fyson
  • Patent number: 6406838
    Abstract: The present invention provides an overcoat for a photographic element that allows for appropriate diffusion of photographic processing solutions. The overcoat comprises 10 to 50% by weight of a enzyme-degradable biopolymer and 50 to 90% by weight of hydrophobic particles (by weight of dry laydown of the entire overcoat). An enzyme is applied to the element before, during, or after conventional photoprocessing. According to one embodiment of the invention, the photographic element can be exposed and processed using normal photofinishing equipment, with no modifications, to provide an imaged element together with a protective, water-resistant layer.
    Type: Grant
    Filed: July 3, 2001
    Date of Patent: June 18, 2002
    Assignee: Eastman Kodak Company
    Inventors: Thomas H. Whitesides, Amy Jasek, Hwei-Ling Yau, Jill E. Fornalik
  • Publication number: 20020061476
    Abstract: The present invention provides an overcoat for a photographic element that allows for appropriate diffusion of photographic processing solutions. The overcoat comprises 10 to 50% by weight of a enzyme-degradable biopolymer and 50 to 90% by weight of hydrophobic particles (by weight of dry laydown of the entire overcoat). An enzyme is applied to the element before, during, or after conventional photoprocessing. According to one embodiment of the invention, the photographic element can be exposed and processed using normal photofinishing equipment, with no modifications, to provide an imaged element together with a protective, water-resistant layer.
    Type: Application
    Filed: July 3, 2001
    Publication date: May 23, 2002
    Inventors: Thomas H. Whitesides, Amy Jasek, Hwei-Ling Yau, Jill E. Fornalik
  • Publication number: 20020051946
    Abstract: 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: Application
    Filed: February 5, 2001
    Publication date: May 2, 2002
    Applicant: Eastman Kodak Company
    Inventors: Jon A. Kapecki, Harry J. Price, David M. Braitsch
  • Publication number: 20020051947
    Abstract: 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: Application
    Filed: August 30, 2001
    Publication date: May 2, 2002
    Inventors: Harry J. Price, William G. Henry
  • Patent number: 6365332
    Abstract: 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: Grant
    Filed: September 7, 2000
    Date of Patent: April 2, 2002
    Assignee: Eastman Kodak Company
    Inventors: Harry J. Price, William G. Henry
  • Publication number: 20020037482
    Abstract: 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: Application
    Filed: August 1, 2001
    Publication date: March 28, 2002
    Inventors: Ralf Wichmann, Thomas Hubsch, Thomas Stetzer
  • Publication number: 20020015922
    Abstract: A method of producing a photographic image in an imagewise exposed photographic material comprising one or more silver halide emulsion layers comprises
    Type: Application
    Filed: May 10, 2001
    Publication date: February 7, 2002
    Applicant: Eastman Kodak Company
    Inventors: John R. Fyson, Gareth B. Evans, Peter Hewitson, Jon A. Kapecki
  • Publication number: 20020015921
    Abstract: A method of producing a photographic image in an imagewise exposed photographic material comprising one or more silver halide emulsion layers comprises
    Type: Application
    Filed: May 10, 2001
    Publication date: February 7, 2002
    Applicant: Eastman Kodak Company
    Inventors: John R. Fyson, Louis E. Friedrich
  • Patent number: 6340560
    Abstract: An aminopolycarboxylic acid compound represented by the following formula or analogous thereof: The aminopolycarboxylic acid compound of the present invention can be used as a chelating agent for various metals, which is excellent in the biodegradability and masking effect on metals.
    Type: Grant
    Filed: October 7, 1998
    Date of Patent: January 22, 2002
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Tadashi Inaba, Kiyoshi Morimoto, Shigeo Hirano
  • Publication number: 20010044081
    Abstract: A granulated solid processing agent for a silver halide photographic material which is a core/shell type spherical granule comprising an internal nucleus and layer structure of one or more layers coating the internal nucleus, and the critical relative humidity of the internal nucleus is 70% or less.
    Type: Application
    Filed: December 27, 2000
    Publication date: November 22, 2001
    Inventors: Kazuaki Yoshida, Hiroki Ide
  • Publication number: 20010031432
    Abstract: A processing composition for a silver halide photographic material, which comprises at least one compound selected from the group consisting of compounds represented by the following general formulae (I) and (II): 1
    Type: Application
    Filed: January 29, 2001
    Publication date: October 18, 2001
    Inventors: Yasufumi Nakai, Keizo Kimura, Shigeaki Tanaka, Yoshiharu Yabuki
  • Patent number: 6303279
    Abstract: An aqueous redox amplifier composition comprising a color developing agent, hydrogen peroxide or a compound which provides hydrogen peroxide and hydroxylamine or a salt thereof wherein the concentration ranges are: hydrogen peroxide from 0.5 to 10 ml/l (as 30% w/w solution), hydroxylamine or a salt thereof from 0.25 to 5.5 g/l (as hydroxylamine sulphate), and wherein the pH is in the range from 10.5 to 12.
    Type: Grant
    Filed: October 4, 1994
    Date of Patent: October 16, 2001
    Assignee: Eastman Kodak Company
    Inventor: Peter Jeffery Twist
  • Patent number: 6258520
    Abstract: The present invention relates to imaging elements, including photographic elements and recording media, having a protective overcoat that resists fingerprints, common stains, and spills. More particularly, the present invention provides a processing-solution-permeable protective overcoat that is water resistant in the final processed product. The overcoat, before formation of the image, comprises hydrophobic polymeric particles in a gelatin matrix. Subsequent treatment of the overcoat, after formation of the image, to remove the gelatin, causes coalescence of the hydrophobic particles, resulting in the formation of a water-resistant continuous protective overcoat.
    Type: Grant
    Filed: September 29, 2000
    Date of Patent: July 10, 2001
    Assignee: Eastman Kodak Company
    Inventors: Hwei-Ling Yau, Thomas H. Whitesides, Elmer C. Flood, Amy E. Jasek
  • Publication number: 20010004514
    Abstract: Specific aromatic compounds having an extended planar &pgr; 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 also be used in various other processing compositions.
    Type: Application
    Filed: February 1, 2001
    Publication date: June 21, 2001
    Inventors: Ramanuj Goswami, Mary E. Craver, Harry J. Price
  • Patent number: 6232052
    Abstract: Specific aromatic compounds having an extended planar &pgr; 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 also be used in various other processing compositions.
    Type: Grant
    Filed: May 15, 2000
    Date of Patent: May 15, 2001
    Assignee: Eastman Kodak Company
    Inventors: Ramanuj Goswami, Mary E. Craver, Harry J. Price
  • Patent number: 6153364
    Abstract: 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: Grant
    Filed: December 16, 1999
    Date of Patent: November 28, 2000
    Assignee: Eastman Kodak Company
    Inventors: Ramanuj Goswami, Harry J. Price, Mary E. Craver
  • Patent number: 6114101
    Abstract: An aqueous redox amplifier composition comprising a color developing agent, hydrogen peroxide or a compound which provides hydrogen peroxide and a hydroxylamine compound of the formula: ##STR1## or a salt thereof wherein R.sup.1 and R.sup.2 are each a substituted or unsubstituted alkyl group of 1-4 carbon atoms and wherein the concentration ranges are:hydrogen peroxide from 0.5 to 10 ml/l (as 30% w/w solution),hydroxylamine compound from 0.5 to 15 ml/l (as an 85% solution of diethylhydroxylamine), and wherein the pH is in the range from 10.5 to 12.
    Type: Grant
    Filed: September 23, 1994
    Date of Patent: September 5, 2000
    Assignee: Eastman Kodak Company
    Inventor: Peter Jeffery Twist
  • Patent number: 6077650
    Abstract: 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: Grant
    Filed: June 28, 1999
    Date of Patent: June 20, 2000
    Assignee: Eastman Kodak Company
    Inventor: Harry J. Price
  • Patent number: 6040122
    Abstract: 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: Grant
    Filed: May 25, 1999
    Date of Patent: March 21, 2000
    Assignee: Agfa Gevaert NV
    Inventors: Thomas Fogel, Jurgen Gohmann, Norman Klaunzer
  • Patent number: 5972583
    Abstract: Color photographic elements can be processed with an acidic periodate bleaching composition that also includes chloride ions as a rehalogenating agent.
    Type: Grant
    Filed: December 7, 1998
    Date of Patent: October 26, 1999
    Assignee: Eastman Kodak Company
    Inventors: Sidney J. Bertucci, Eric R. Schmittou
  • Patent number: 5962204
    Abstract: A conditioning or bleach accelerating solution is prepared by diluting a concentrate up to 25 times. The concentrate contains a formaldehyde bisulfite precursor salt at from 200 to 600 g/l, sulfite ions at 0 to 200 g/l, a bleach accelerating agent at from 1.5 to 25 g/l, and a metal ion chelating agent present at up to 60 g/l. The concentrate is free of sodium ions.
    Type: Grant
    Filed: June 10, 1998
    Date of Patent: October 5, 1999
    Assignee: Eastman Kodak Company
    Inventors: Jean Marie Buongiorne, Michael John Haight
  • Patent number: 5945262
    Abstract: The present invention provides a correcting liquid for silver imaged lithographic printing plates being an aqueous solution having a pH in the range between 5.5 and 8.5 and comprising a iron (III) complex salt of an organic acid, a sulphite or a metabisulphite, a silver halide solvent and an accelerator, said accelerator being an organic heterocyclic compound having a mercapto- or thione group and not having a hydrophilic substituent besides the said mercapto or thione group characterized in that said accelerator is present in an amount ranging from 0.04 to 0.4 mole per liter of correcting liquid.
    Type: Grant
    Filed: December 4, 1996
    Date of Patent: August 31, 1999
    Assignee: Agfa-Gevaert, N.B.
    Inventor: Lode Deprez
  • Patent number: 5866310
    Abstract: Disclosed is a solid photographic processing composition for developing a silver halide photographic light-sensitive material comprising a ferric complex of an aminopolycarboxylic acid and a sugar alcohol compound.
    Type: Grant
    Filed: October 15, 1996
    Date of Patent: February 2, 1999
    Assignee: Konica Corporation
    Inventor: Kenji Ishida
  • Patent number: 5834170
    Abstract: A ferric-EDTA bleach regenerator composition can be made with bleach overflow to provide a bleach replenisher for reversal color silver halide photographic processes. The bleach regenerator composition has a critically controlled pH between about 6.0 and about 6.5, and comprises a total bromide ion concentration of at least about 210 g/l, and ferric ion in an amount of at least about 50 g/l. At least 50% of the bleach overflow and the bleach regenerator composition are mixed in at least a 1:1 volume ratio. After pH adjustment to from about 5.4 to about 5.6, the pH adjusted replenisher is supplied to the bleach tank for use in the process.
    Type: Grant
    Filed: November 19, 1997
    Date of Patent: November 10, 1998
    Assignee: Eastman Kodak Company
    Inventors: Mary Ellen Craver, Jean Marie Buongiorne, Michael John Haight
  • Patent number: 5827636
    Abstract: A conditioning or bleach accelerating solution is prepared by diluting a concentrate up to 25 times. The concentrate contains a formaldehyde bisulfite precursor salt at from 200 to 600 g/l, sulfite ions at 0 to 200 g/l, a bleach accelerating agent at from 1.5 to 25 g/l, and a metal ion chelating agent present at up to 60 g/l. The concentrate is free of sodium ions.
    Type: Grant
    Filed: September 26, 1997
    Date of Patent: October 27, 1998
    Assignee: Eastman Kodak Company
    Inventors: Jean Marie Buongiorne, Michael John Haight
  • Patent number: 5821042
    Abstract: A multilayer silver halide color photographic element comprises a support having coated thereon a silver antihalation layer, an interlayer, at least two red-sensitive silver halide emulsion layers, at least two green-sensitive silver halide emulsion layers a yellow filter layer, and at least two blue-sensitive silver halide emulsion layers, wherein the interlayer provided between the silver antihalation layer and the red-sensitive silver halide emulsion layer closest to the support contains a bleach accelerator releasing compound, and the silver antihalation layer contains a water-soluble organic thiol.The invention provides reduction in residual silver levels and backside turbidity after processing, without deleteriously affecting sensitometric properties of the photographic element.
    Type: Grant
    Filed: May 22, 1997
    Date of Patent: October 13, 1998
    Assignee: Imation Corp.
    Inventors: Sergio Massirio, Massimo Bertoldi, Giovanni Giusto, Emilio Prosperi, Roberto Sardelli
  • Patent number: 5817450
    Abstract: An emulsification and dispersion method of a hydrophobic, photographically useful compound comprising dispersing a water-insoluble phase containing the hydrophobic, photographically useful compound in water or in a hydrophilic colloid composition, wherein the water-insoluble phase at a temperature at which the prepared dispersion is stored may have a viscosity of from 100 poise or more to less than 1,000,000 poise at the shear rate of 10 sec.sup.-1. According to the present invention, a silver halide photographic material comprising a fine dispersion of a hydrophobic, photographically useful compound and having an excellent production suitability can be obtained.
    Type: Grant
    Filed: February 22, 1996
    Date of Patent: October 6, 1998
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Naoyuki Kawanishi, Masataka Ogawa, Atsushi Hayakawa, Kazuhiko Fujiwara
  • Patent number: 5814436
    Abstract: The present invention provides a processing method which allows a silver halide color photographic material to be sufficiently desilvered and minimizes the rise in the formation of bleaching fog or stain even when it is processed in a short period of time. A novel process for the processing of a silver halide color photographic material comprising at least silver halide emulsion layer on a support which comprises subjecting the silver halide color photographic material to color development, and then processing the silver halide color photographic material with a processing solution having a bleaching capacity is provided, characterized in that said emulsion layer comprises tabular silver halide grains having ?100! major faces and a silver chloride content of 50 to 100 mol % and said processing solution having a bleaching capacity contains at least one ferric complex salt of a compound represented by the following general formula (I): ##STR1## wherein R.sub.1, R.sub.2, R.sub.3, R.sub.4, R.sub.5 and R.sub.
    Type: Grant
    Filed: May 27, 1997
    Date of Patent: September 29, 1998
    Assignee: Fuji Photo Film Co., Ltd.
    Inventor: Takatoshi Ishikawa
  • Patent number: 5795681
    Abstract: The present invention pertains to a process for the stabilization of Holograms formed on gelatin.According to the invention, after (i) exposing, (ii) developing, and (iii) quenching said Hologram, there is added thereto (iv) a bleaching bath based on an oxidative cross-linking agent at a pH value of at least 3 or more, and thereafter, following (v) rinsing, (vi) fixing, (vii) additional rinsing and (viii) a final bath, (ix) said support material is dehydrated by the use of one or more baths in series containing a solvent which is water-miscible and does not affect the cured gelatin structure.In another embodiment, the invention pertains to light-directing wall elements for buildings made of a Holograms obtainable by the process mentioned above and applied to a transparent or opaque substrate.By means of the present invention, silver-free holographic support materials can be prepared.
    Type: Grant
    Filed: March 24, 1997
    Date of Patent: August 18, 1998
    Inventors: Helmut Muller, Jorg Gutjahr
  • Patent number: 5783376
    Abstract: A composition for bleaching or bleach-fixing a silver halide photographic material has a pH of from 2 to 9. The composition comprises a bleaching agent which is either a persulfate or polyvalent metal complex of an aminopolycarboxylic acid, and from 0.01 to 2M of a sulfo-substituted carboxylate represented by Formula I(MO.sub.3 S).sub.n --R--(COOM).sub.m (I)wherein R is a benzene ring or a straight, branched or cyclic saturated aliphatic group having 2 to 8 carbon atoms;M is hydrogen or an organic or inorganic cation; andn is 1 to 7;with the proviso that if R is an aliphatic group, m is 2 to 4 and m and n combined cannot equal more than the number of carbon atoms in R plus two, and if R is a benzene ring, m is 2 to 5 and m and n combined cannot equal more than six.
    Type: Grant
    Filed: May 14, 1997
    Date of Patent: July 21, 1998
    Assignee: Eastman Kodak Company
    Inventors: Stuart Terrance Gordon, John Michael Buchanan, Sidney Joseph Bertucci
  • Patent number: 5783375
    Abstract: A redox amplification process with minimal steps includes processing a silver halide with an amplifier/bleach/fix solution that includes a redox oxidant capable of bleaching a silver image and a fixing agent that does not react with the redox oxidant.
    Type: Grant
    Filed: August 29, 1996
    Date of Patent: July 21, 1998
    Assignee: Eastman Kodak Company
    Inventor: Peter Jeffery Twist