Antifoggant Patents (Class 430/489)
  • Patent number: 6602655
    Abstract: A concentrated black-and-white photographic developing composition has improved stability, is compatible with the environment and provides desired sensitometric properties with a combination of particular antifoggants. These antifoggants include a mercapto-substituted tetrazole and a benzimidazole that has one or more electron withdrawing groups. This concentrated composition can be used as a first “part” and mixed, upon dilution, with a diluted second “part” that is a concentrated composition of a gelatin hardening agent. When mixed together, the two diluted concentrates form a working strength developing composition that can be used to provide black-and-white images in various photographic silver halide materials, and particularly in radiographic films.
    Type: Grant
    Filed: April 18, 2002
    Date of Patent: August 5, 2003
    Assignee: Eastman Kodak Company
    Inventors: Alan S. Fitterman, Joan F. Rachel
  • Publication number: 20030082490
    Abstract: Rapid development of silver bromoiodide color negative photographic films and formation of high quality negative images suitable for scanning to produce display images of excellent quality is made possible by a novel developer solution composition and method of development. The solution is characterized by containing, in addition to the color developer compound and conventional photographic developer solution components, a water soluble pyrrolidone polymer, a high concentration of sulfite ion and a low concentration, or the absence of, bromide ion. In the novel method the developer composition contacts the exposed film at elevated temperature, e.g., 40 to 66° C., for a short development time, e.g., 20 to 90 seconds. The developed image has image quality suitable for scanning and digital manipulation to produce a digital record for forming a color display image of high quality.
    Type: Application
    Filed: May 20, 2002
    Publication date: May 1, 2003
    Inventors: Robert A. Arcus, Peter N. Bacel, John A. Weldy
  • Publication number: 20020168597
    Abstract: A concentrated black-and-white photographic developing composition has improved stability, is compatible with the environment and provides desired sensitometric properties with a combination of particular antifoggants. These antifoggants include a mercapto-substituted tetrazole and a benzimidazole that has one or more electron withdrawing groups. This concentrated composition can be used as a first “part” and mixed, upon dilution, with a diluted second “part” that is a concentrated composition of a gelatin hardening agent. When mixed together, the two diluted concentrates form a working strength developing composition that can be used to provide black-and-white images in various photographic silver halide materials, and particularly in radiographic films.
    Type: Application
    Filed: April 18, 2002
    Publication date: November 14, 2002
    Inventors: Alan S. Fitterman, Joan F. Rachel
  • Publication number: 20020146652
    Abstract: A concentrated black-and-white photographic developing composition has improved stability, is compatible with the environment and provides desired sensitometric properties with a combination of particular antifoggants. These antifoggants include a mercapto-substituted tetrazole and a benzimidazole that has one or more electron withdrawing groups. This concentrated composition can be used as a first “part” and mixed, upon dilution, with a diluted second “part” that is a concentrated composition of a gelatin hardening agent. When mixed together, the two diluted concentrates form a working strength developing composition that can be used to provide black-and-white images in various photographic silver halide materials, and particularly in radiographic films.
    Type: Application
    Filed: January 24, 2001
    Publication date: October 10, 2002
    Applicant: Eastman Kodak Company
    Inventors: Alan S. Fitterman, Joan F. Rachel
  • Patent number: 6376162
    Abstract: In a processing method wherein, after a silver halide color photographic material is subjected to color development, the silver halide color photographic material is desilvered and then washed and/or stabilized, a photographic material that has at least one high-silver chloride emulsion layer, and in which at least one emulsion layer contains a monodisperse emulsion, is rapidly processed with a color developer having a water-soluble high polymer compound. The coating amount of silver of the said silver halide color photographic material is preferably 0.75 g/m2 or less, and the color developer contains chloride ions in an amount of 0.035 mol/liter or more. In continuous and rapid processing, fluctuations of photographic properties (particularly changes in sensitivity and gradation) are remarkably reduced, the ununiformity of developed density is remarkably improved, and the occurrence of a deposit on a processing tank wall surface is prevented.
    Type: Grant
    Filed: April 22, 1994
    Date of Patent: April 23, 2002
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Takatoshi Ishikawa, Kazuaki Yoshida, Hiroshi Fujimoto, Junichi Yamanouchi, Tomokazu Yasuda
  • Patent number: 6350563
    Abstract: A photographic black-and-white reversal first developer, which is substantially free from hydroquinone and which contains at least substances a) to d): a) hydroquinonesulphonic acid, b) a polyglycol with an average molecular weight of 200 to 600, c) an anti-fogging agent, and d) an auxiliary developer, gives clear light regions and high maximum densities after reversal development and can also be used at temperatures considerably above 20° C.
    Type: Grant
    Filed: November 16, 1998
    Date of Patent: February 26, 2002
    Assignee: AGFA-Gevaert
    Inventors: Ralf Wichmann, Ubbo Wernicke
  • Publication number: 20010046648
    Abstract: The invention relates to an aqueous concentrated solution of a photographic antifoggant. This antifoggant is 3-nitrobenzene sulfonate of sodium, and the solution contains between about 50 and 150 g/l of this antifoggant.
    Type: Application
    Filed: March 9, 2001
    Publication date: November 29, 2001
    Applicant: Eastman Kodak Company
    Inventor: Francoise M. Thomas
  • Patent number: 6312878
    Abstract: This invention concerns a kit for the development of color photographic products. The kit comprises a basic solution containing an antifogging agent, and a second solution containing a color developing agent. This kit allows an easier preparation of the developer and of replenishment solutions of the developer.
    Type: Grant
    Filed: October 24, 2000
    Date of Patent: November 6, 2001
    Assignee: Eastman Kodak Company
    Inventor: Francoise M. Thomas
  • Patent number: 6083671
    Abstract: Equidensity images can be produced directly on high contrast, thin emulsion, fine grain, silver halide process films, such as Kodak Technical Pan Film (RTM), given instantaneous outdoor camera exposure. Photographic development of the film in an aqueous alkaline solution containing a halogen- substituted hydroquinone such as 2-chlorohydroquinone, or 2-bromohydroquinone as developing agent, and thiourea, or a mono N-substituted derivative such as 1-allyl-2-thiourea, as "chemical solarizer", followed by fixation, produces continuous tone violet-blue (negative) and brown to olive-black (positive) images having applicability in semi-abstract artistic photography and in scientific photography.
    Type: Grant
    Filed: July 19, 1999
    Date of Patent: July 4, 2000
    Inventor: Harvey Warren Yurow
  • Patent number: 5981153
    Abstract: Black-and-white elements, such as radiographic films, can be processed in roomlight because the developing composition includes a particulate opacifying agent, such as carbon black. Processing is carried out by processing the exposed element using a two-stage process in the same processing container. In the first stage, development is initiated with an opaque developing composition having a pH of from about 10 to about 12.5, and comprising an appropriate black-and-white developing agent in a concentration of from about 0.1 to about 0.5 mol/l, opacifying agent, and a sulfite at from about 0.1 to about 0.7 mol/l. After an appropriate time, a fixing agent (other than a sulfite) is introduced into the processing container to begin simultaneous development and fixing. The entire process in quite rapid, that is less than 90 seconds.
    Type: Grant
    Filed: December 4, 1998
    Date of Patent: November 9, 1999
    Assignee: Eastman Kodak Company
    Inventors: Alan S. Fitterman, Robert E. Dickerson
  • Patent number: 5962203
    Abstract: A new fogging photographic processing solution for a reversal process comprises a compound (I) and a bi-nucleophilic agent. Compound (I) corresponds to the following formula: ##STR1## wherein A is a group capable of being adsorbed to the silver halide surface, L is a linking group and r is 0 or 1, R.sub.1 and R.sub.2 are independently selected from an alkyl group, substituted or unsubstituted, and an aryl group substituted or unsubstituted. A process of producing a positive image by imagewise exposure of a reversal silver halide material comprises contacting the material with the above fogging solution or by imagewise exposure of such a material containing a compound (I) and contacting the material with a solution comprising a bi-nucleophilic agent.
    Type: Grant
    Filed: August 6, 1998
    Date of Patent: October 5, 1999
    Assignee: Eastman Kodak Company
    Inventors: Siu C. Tsoi, Peter J. Twist, David T. Southby
  • Patent number: 5942380
    Abstract: The present invention concerns a novel method for developing silver halide photographic products. This method involves processing photographic products that have an incorporated developing agent, and a nucleation agent, by surface application of an activator solution. This method intended for processing graphic arts films having high contrast.
    Type: Grant
    Filed: June 10, 1998
    Date of Patent: August 24, 1999
    Assignee: Eastman Kodak Company
    Inventor: Francoise M. Thomas
  • Patent number: 5935771
    Abstract: This invention relates to a method of preventing fog formation in a silver halide photographic element, said method comprising bringing a silver halide developer solution, or a solution preceding a silver halide developer solution, into contact with a cyanide scavenger by a method other than the seasoning out of the cyanide scavenger from a sensitized silver halide photographic element.
    Type: Grant
    Filed: June 5, 1998
    Date of Patent: August 10, 1999
    Assignee: Eastman Kodak Company
    Inventors: Terrence Robert O'Toole, Daniel Lawrence Kapp, Kenneth George Harbison, Frank Anthony Pettrone, Kenneth Don Fowler
  • Patent number: 5935773
    Abstract: A colour photographic silver halide material with a support, at last one silver halide emulsion layer containing at least one yellow coupler and at least one silver halide emulsion layer containing a cyan coupler applied thereon, in which material the silver halide emulsion layer, of which there is at least one, containing at least one yellow coupler and/or the silver halide emulsion layer, of which there is at least one, containing at least one cyan coupler contains a compound of the formula (I) ##STR1## in which R.sub.1, R.sub.2, R.sub.3 mean alkyl, alkenyl or acyl andn means 6, 7 or 8,is distinguished by improved stability of the image dyes produced by processing.
    Type: Grant
    Filed: April 29, 1996
    Date of Patent: August 10, 1999
    Assignee: Agfa-Gevaert AG
    Inventors: Jorg Hagemann, Gunter Helling
  • Patent number: 5912108
    Abstract: A method has been disclosed of processing an image-wise exposed light-sensitive black-and-white silver halide photographic material comprising a support coated on one or both sides thereof with hydrophilic layers, wherein at least one of said layers comprises one or more emulsions having tabular silver halide crystals rich in silver chloride, said method comprising the steps of developing, fixing, rinsing and drying, further characterized in that said developing step proceeds in a black-and-white developer comprising one or more organic compounds inhibiting development, more preferably one or more benzotriazole compounds, and in that said developer is substantially free from bromide ions in favor of a low fog level, a high speed and a sufficiently high covering power of the developed tabular grains.
    Type: Grant
    Filed: December 16, 1997
    Date of Patent: June 15, 1999
    Assignee: Agfa-Gevaert, N.V.
    Inventors: Ann Verbeeck, Peter Verrept, Freddy Henderickx
  • Patent number: 5882847
    Abstract: A color light-sensitive material advantageous in that a ratio of .gamma. in a short time processing using a color developer containing a silver halide solvent to .gamma. in a standard time processing using a color developer containing no silver halide solvent is from 0.8 to 1.2 in any case of yellow, magenta and cyan and an image formation method using the same.
    Type: Grant
    Filed: March 10, 1997
    Date of Patent: March 16, 1999
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Akimitsu Haijima, Toshihiro Nishikawa
  • Patent number: 5840470
    Abstract: Silver bromide color negative films can be rapidly processed using shortened color development times and specific amounts of color developing agent and bromide ion. After development, and optionally desilvering or fixing, the developed film is scanned to form density representative digital signals for the color records. These signals are then digitally manipulated to correct both interimage interactions and gamma mismatches around the color records to produce a digital record that is capable of providing a display image having desired aim color and tone scale reproduction. That digital record can then be stored or used to provide corrected display images, such as color prints, using output display devices.
    Type: Grant
    Filed: July 7, 1997
    Date of Patent: November 24, 1998
    Assignee: Eastman Kodak Company
    Inventors: Anne E. Bohan, John M. Buchanan, Richard P. Szajewski
  • Patent number: 5811226
    Abstract: This invention relates to a method of preventing fog formation in a silver halide photographic element, said method comprising bringing a silver halide developer solution, or a solution preceding a silver halide developer solution, into contact with a cyanide scavenger by a method other than the seasoning out of the cyanide scavenger from a sensitized silver halide photographic element.
    Type: Grant
    Filed: March 14, 1996
    Date of Patent: September 22, 1998
    Assignee: Eastman Kodak Company
    Inventors: Terrence Robert O'Toole, Daniel Lawrence Kapp, Kenneth George Harbison, Frank Anthony Pettrone, Kenneth Don Fowler
  • Patent number: 5770351
    Abstract: There is described a method of processing silver halide photographic material in a processing machine using a developing solution which comprises either a hydroquinone type developing agent or a reductone type developing agent, together with an electron transfer agent as an auxiliary developing agent, and with at least one basic compound the anion of which is carbonate, sulphite or hydroxide, where in the presence of a compound of formula (I), Ar is an aromatic ring or heterocyclic aromatic ring which is optionally substituted.
    Type: Grant
    Filed: August 15, 1997
    Date of Patent: June 23, 1998
    Assignee: Ilford Limited
    Inventors: William Edward Long, Michael John Parker
  • Patent number: 5766833
    Abstract: An image-forming process developing a previously image-exposed silver halide photographic material with an alkaline developer containing a reductone compound as a main developing agent in the presence of a 1,2,5-thiadiazole compound and/or a 2,1,3-benzothiadiazole compound, and the silver halide photographic material and the photographic developer being used for the process are disclosed. In this case, the 1,2,5-thuiadiazole compound and/or the 2,1,3-benzothiadiazole may be contained in the silver halide photographic material and/or the alkaline developer. Super high-contrast images for photomechanical process having a gamma of higher than 15 and having no pepper and less fog can be obtained.
    Type: Grant
    Filed: July 8, 1997
    Date of Patent: June 16, 1998
    Assignee: Dainippon Ink and Chemicals Inc.
    Inventors: Kiyoshi Suematsu, Hiroaki Muratake, Haruhiko Kaji, Naoki Obi, Yasuhiko Kojima, Yasuo Shigemitsu
  • Patent number: 5756253
    Abstract: There are described novel photographic processing compositions, film units and processes for use in diffusion transfer photographic systems. More particularly, there is described a method for forming a diffusion transfer image photographic processing of diffusion transfer photographic film units in the presence of hypoxanthine and inosine. Diffusion transfer photographic systems utilizing the novel photographic element or method of the present invention exhibit substantially fewer, if any, crystals on the final image of the finished photograph post-processing.
    Type: Grant
    Filed: July 9, 1997
    Date of Patent: May 26, 1998
    Assignee: Polaroid Corporation
    Inventors: Robert D. Eckert, Michael P. Filosa, Gerard Gomes, Anthony R. Layne, Marlene C. Schwarz, Lloyd D. Taylor
  • Patent number: 5725998
    Abstract: A method of developing an exposed black and white silver halide photographic light-sensitive material with developer using an automatic processor is disclosed, the developing comprising supplying replenisher for developer in an amount of not more than 200 ml per m.sup.2 of the material, the material containing a hydrazine derivative and an infectious development nucleation agent, and the developer having a pH value of 10.0 to 11.2 and containing a dihydroxy benzene compound, a 3-pyrazolidone compound or an aminophenol compound, a sulfite of 0.3 to 1.
    Type: Grant
    Filed: April 10, 1997
    Date of Patent: March 10, 1998
    Assignee: Konica Corporation
    Inventor: Takeshi Sanpei
  • Patent number: 5698379
    Abstract: Silver chloride color negative films can be rapidly processed using shortened color development times and specific amounts of color developing agent and bromide ion. After development, and optionally desilvering or fixing, the developed film is scanned to form density representative digital signals for the color records. These signals are then digitally manipulated to correct both interimage interactions and gamma mismatches around the color records to produce a digital record that is capable of providing a display image having desired aim color and tone scale reproduction. That digital record can then be stored or used to provide corrected display images, such as color prints, using output display devices.
    Type: Grant
    Filed: October 15, 1996
    Date of Patent: December 16, 1997
    Assignee: Eastman Kodak Company
    Inventors: Anne E. Bohan, John M. Buchanan, Richard P. Szajewski
  • Patent number: 5698381
    Abstract: A low volume developer tank system for the sequential processing of films that require different concentrations of bromide ions in the developer solution comprises a developer tank (2) provided with an ion exchange column (30) for removing bromide ions from solution which column can be engaged and disengaged and a plurality of reservoirs (6,8,10,12,14) arranged to feed individual replenisher components to the recirculation system (20). When processing a process C-41 compatible film the system is preferably operated with no bromide in the replenisher and removal of bromide from the developer is by overflow. When processing a film employing zero or very low bromide, the system is preferably operated with no bromide in the replenisher, substantially no overflow and removal of bromide from the developer is by ion exchange.
    Type: Grant
    Filed: September 13, 1996
    Date of Patent: December 16, 1997
    Assignee: Eastman Kodak Company
    Inventor: Nigel Richard Wildman
  • Patent number: 5667949
    Abstract: Photographic elements having bromide or iodide ion stabilized high chloride {111} tabular grain emulsions are rapidly processed. The emulsion grains comprise a high chloride core with a surrounding band of higher bromide or iodide ion than that found in the core. The emulsion is precipitated in the presence of an organic grain growth modifier or surface stabilizer. Specific developing conditions of temperature, time, bromide ion concentration, color developing agent concentration and ratio of developing agent to bromide ion allow for the rapid processing of these elements.
    Type: Grant
    Filed: January 5, 1996
    Date of Patent: September 16, 1997
    Assignee: Eastman Kodak Company
    Inventor: Richard Peter Szajewski
  • Patent number: 5629140
    Abstract: An improved photographic element comprises a support bearing at least one silver halide emulsion layer having associated therewith a hydrazide compound that functions as a scavenger for oxidized developing agent. The hydrazide compound includes an electron-withdrawing and aqueous-solubilizing group on an aromatic ring linked to the carbonyl of the hydrazide group and a ballasting group on an aromatic ring linked to a nitrogen atom of the hydrazide group. Preferably, the hydrazide compound is incorporated in a photographic element which comprises a four-equivalent 5-pyrazolone magenta-dye-forming coupler.
    Type: Grant
    Filed: January 17, 1995
    Date of Patent: May 13, 1997
    Assignee: Eastman Kodak Company
    Inventors: John W. Harder, John V. Nelson, Stephen P. Singer
  • Patent number: 5578426
    Abstract: There is disclosed a method for processing a silver halide color photographic material having, on a support, at least one photosensitive silver halide emulsion layer, which comprises processing after exposure to light said silver halide color photographic material, wherein the silver halide in said emulsion layer contains 90 mol % or more of silver chloride, and said photographic material has a white pigment-containing hydrophilic colloid layer coated on the support, the coating amount of the white pigment being 2 g/m.sup.2 or more, with a color developer containing chloride ions in an amount of 0.04 to 0.25 mol/l.
    Type: Grant
    Filed: December 14, 1994
    Date of Patent: November 26, 1996
    Assignee: Fuji Photo Film Co., Ltd.
    Inventor: Koichi Nakamura
  • Patent number: 5578434
    Abstract: The present invention relates to a black-and-white aqueous alkaline photographic developer composition, free of dihydroxybenzene developing agent, comprising a reductic acid developing agent and an auxiliary superadditive developing agent, wherein the reductic acid developing agent is represented by the formula (I): ##STR1## wherein, R.sub.1, R.sub.2, R.sub.3 and R.sub.4 each are selected from the group consisting of hydrogen and group CH.sub.2 R.sub.5, wherein R.sub.5 is hydrogen or a monovalent group, e.g. amino, cyano, halogen, hydroxyl, carboxyl, sulfonyl, alkyl, cycloalkyl, aryl.A process for forming a black-and-white photographic silver image comprising developing a silver halide photographic element with said black-and-white aqueous alkaline photographic developer composition is also described.
    Type: Grant
    Filed: May 15, 1995
    Date of Patent: November 26, 1996
    Assignee: Imation Corp.
    Inventors: Elda Moizo, Carlo Marchesano, Andrew Mott, Dian E. Stevenson
  • Patent number: 5561040
    Abstract: There is provided a method for forming an image, which comprises processing a silver halide color photographic material that has a high-silver-chloride silver halide emulsion and which contains in the photographic material a nitrogen-containing heterocyclic compound, the solubility product of which for the silver salt is in a limited range, with a color developer containing chloride ions and bromide ions in a limited concentration, respectively. The method is excellent in forming an image that can be performed rapidly, and is high in sensitivity, in prevention of processing color-mixing, and in less fluctuation of the photographic quality involved in continuous processing.
    Type: Grant
    Filed: May 26, 1995
    Date of Patent: October 1, 1996
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Kiyoshi Kawai, Shigeaki Ohtani
  • Patent number: 5523196
    Abstract: Disclosed is a method for developing a silver halide photographic light-sensitive material with a developer having a pH within the range of 9.5 to 10.7 through an automatic processor, wherein said silver halide photographic light-sensitive material comprises a support and thereon, at least one silver halide emulsion layer comprising silver halide grains containing at least 60 mol % of silver chloride, comprising the steps of:replenishing a first developer replenishing-solution having lower activity than a starter for a developer; andreplenishing a second developer replenishing-solution having the substantially same activity as said starter for a developer.
    Type: Grant
    Filed: October 13, 1994
    Date of Patent: June 4, 1996
    Assignee: Konica Corporation
    Inventors: Mariko Iwashita, Takeshi Sampei
  • Patent number: 5508153
    Abstract: A method for processing an imagewise exposed black-and-white negative silver halide photographic light-sensitive material comprising a support having provided thereon photographic layers including at least one silver halide emulsion layer, one of said photographic layers containing a hydrazine derivative, said method comprising;developing said light-sensitive material with a developer comprising a black and white developing agent and a compound represented by Formula VI, said developer having a pH of less than 11.5; ##STR1## wherein R.sub.1, R.sub.2, and R.sub.3 are each independently hydrogen, --SM.sub.1, hydroxyl, alkoxyl having 1 to 5 carbon atoms, --COOM.sub.2, amino, alkyl having 1 to 5 carbon atoms, provided that at least one of R.sub.1, R.sub.2, and R.sub.3 is --SM.sub.1, and M.sub.1 and M.sub.2 are each independently hydrogen, alkali metal, or ammonium.
    Type: Grant
    Filed: January 27, 1995
    Date of Patent: April 16, 1996
    Assignee: Konica Corporation
    Inventors: Wataru Ishikawa, Takeshi Sanpei, Mariko Kato
  • Patent number: 5508154
    Abstract: An image-forming process of a silver halide photographic material having at least one light-sensitive silver halide emulsion layer on a support, which comprises imagewise exposing the photographic material and developing the exposed photographic material using a developer under the presence of a compound represented by formula (I); ##STR1## wherein Q represents a non-metallic atomic group having at least one of a nitrogen atom, an oxygen atom, and a sulfur atom. and which is necessary for forming a 5-membered heterocyclic ring together with the two carbon atoms of the 1,2,3-triazole ring; Y represents a substituent; and n represents 0 or an integer of from 1 to 3, when n is 2 or 3, Y's may be the same or different; and a silver halide photographic material and a developer each containing the compound represented by formula (I).
    Type: Grant
    Filed: December 15, 1994
    Date of Patent: April 16, 1996
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Yuki Mizukawa, Hidetoshi Kobayashi
  • Patent number: 5503966
    Abstract: Photographic developing compositions are provided that are free of dihydroxybenzene developing agents and are used in the processing of photographic elements. The developing compositions have a pH in the range of from 10.1 to 10.9 and comprise at least 0.17 moles per liter of an ascorbic acid developing agent, 0.3 to 0.5 moles per liter of a sulfite and 0.2 to 0.4 moles per liter of a carbonate buffer. Also provided is an ecologically advantageous method for processing photographic elements which utilizes the non-toxic developing compositions.
    Type: Grant
    Filed: July 22, 1994
    Date of Patent: April 2, 1996
    Assignee: International Paper Company
    Inventors: Sylvia Adae-Amoakoh, Bruce M. Resnick
  • Patent number: 5503965
    Abstract: The present invention improves the running stability of a developer comprising an ascorbic acid instead of hydroquinone as a developing agent. The present invention provides a process for development of a black-and-white silver halide photographic material, which comprises use of a development replenisher for black-and-white silver halide photographic material comprising an ascorbic acid and/or derivative thereof which has a pH value of at least 0.5 higher than that of the development starting solution.
    Type: Grant
    Filed: September 27, 1994
    Date of Patent: April 2, 1996
    Assignee: Fuji Photo Film Co., Ltd.
    Inventor: Eiichi Okutsu
  • Patent number: 5464730
    Abstract: Disclosed is a method of developing a transmission black-and-white silver halide photographic material with an automatic processor, in which a developer having a bromide ion concentration of 0.01 mol/liter or less and having a pH value of 9.8 or less is used with replenishment of the developer being in an amount of about 200 ml or less per m.sup.2 of the material being processed. Though the amount of the replenisher to the developer used is small in the method, the photographic properties of the processed material are stable and the processed material is fogged little.
    Type: Grant
    Filed: April 22, 1994
    Date of Patent: November 7, 1995
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Eiichi Okutsu, Takashi Toyoda, Tadashi Ito
  • Patent number: 5457009
    Abstract: A method of processing a photographic material having, in the backing layer, at least one mercapto pyrimidine compound of formula (I), with an automatic developing machine, where the amount of the replenisher of the developer per unit area of the material being processed is reduced. The processed materials have stable photographic properties and few silver stains. The mercapto pyrimidine has the following structure ##STR1## wherein R.sub.1 and R.sub.2 each represents a hydrogen atom, an alkyl group, an aryl group, an aralkyl group, a hydroxyl group, a mercapto group, a carboxyl group, a sulfo group, a phosphono group, a nitro group, a cyano group, a halogen atom, an alkoxycarbonyl group, an aryloxycarbonyl group, a carbamoyl group, a sulfamoyl group or an alkoxy group. The sum of the carbon atoms contained in R.sub.1 and R.sub.2 is from 2 to 20. R.sub.1 and R.sub.2 may be bonded to each other to form a ring structure.
    Type: Grant
    Filed: March 17, 1994
    Date of Patent: October 10, 1995
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Takashi Toyoda, deceased, Eiichi Okutsu, Kouta Fukui
  • Patent number: 5457010
    Abstract: A solid developing composition for providing a color developer of a silver halide photographic light-sensitive material is disclosed, which comprises a compound represented by the following Formula (I), and a compound represented by the following Formula (II) or a saccharide: ##STR1##
    Type: Grant
    Filed: July 18, 1994
    Date of Patent: October 10, 1995
    Assignee: Konica Corporation
    Inventors: Wataru Satake, Yoshimasa Komatsu
  • Patent number: 5380625
    Abstract: A method for processing a silver halide color photographic material, which comprises processing an image-wise exposed silver halide color photographic material comprising at least one silver halide emulsion layer and containing an N,N-substituted malondiamide type coupler with a color developer containing an aromatic primary amine color developing agent represented by the following general formula (D) or (E): ##STR1## In a preferred embodiment, the photographic light-sensitive material contains a cyan coupler represented by the following general formula (C): ##STR2##
    Type: Grant
    Filed: February 5, 1993
    Date of Patent: January 10, 1995
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Keiji Mihayashi, Masato Taniguchi, Naoki Saito
  • Patent number: 5376509
    Abstract: A processing chemical for light-sensitive silver halide photographic material, comprising a cyclodextrin compound, which can contribute a decrease in packaging materials, transportation cost and storage space, can be free from lateral cracking at the formation of tablets, and can bring about an improvement in storage stability after being formed into processing solutions (i.e., more free from occurrence of stain during developing and scratches in light-sensitive materials having been processed, caused by deposition of crystals).
    Type: Grant
    Filed: November 27, 1992
    Date of Patent: December 27, 1994
    Assignee: Konica Corporation
    Inventors: Hiroshi Yoshimoto, Shoji Nishio, Hideki Komatsu, Satomi Kawasaki
  • Patent number: 5344750
    Abstract: A color development process for processing an imagewise exposed silver halide color photographic material comprising a support having thereon at least one light-sensitive silver halide emulsion layer comprising a color coupler and a silver iodobromide emulsion containing silver iodide in an amount of from 2 to 20 mol %, comprising the step of processing the color photographic material in a color developing solution containing a color developing agent and bromide ion for 40 seconds to 90 seconds, wherein the color developing agent is represented by formula (D'): ##STR1## wherein R.sub.1d, and R.sub.2d, each represents an alkyl group having 1 to 4 carbon atoms; and L.sub.1 represents a straight-chain or branched alkylene group having 3 or 4 carbon atoms, the concentration {Br.sup.- } of bromide ion in the color developing solution is from 30 to 60 mmol/l, the relationship between the concentration {R} of the color developing agent in the color developing solution and the concentration {Br.sup.
    Type: Grant
    Filed: May 11, 1993
    Date of Patent: September 6, 1994
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Hiroshi Fujimoto, Masato Taniguchi
  • Patent number: 5340705
    Abstract: An aqueous alkaline processing liquid for use in silver halide photography, wherein said liquid comprises one or more alkanolamines, the said alkanolamines consisting of one or more tertiary alkanolamines in a total amount in the range from 0.3 mol/l to 1.5 mol/l, and one or more secondary alkanolamines in an amount from 0 mol % to 30 mol % with respect to the amount of tertiary alkanolamine(s), and said liquid also contains sulphite ions in an amount in the range of 16 g/l to 30 g/l.
    Type: Grant
    Filed: March 2, 1993
    Date of Patent: August 23, 1994
    Assignee: AGFA-Gevaert, N.V.
    Inventors: Rene De Keyzer, Raymond L. Odeurs, Luc A. De Brabandere
  • Patent number: 5318881
    Abstract: This invention relates to a method of processing an image-wise exposed silver halide photographic material wherein said method comprises the following steps:(a) developing the photographic material for 5 to 15 seconds in an aqueous developing solution,(b) fixing the photographic material for 5 to 15 seconds in an aqueous fixing solution, and(c) washing the photographic material for 5 to 20 seconds,wherein both said developing and fixing solutions are free of gelatin hardeners.The method is particularly intended for use in processing radiographic films which:comprise a support and silver halide emulsion layer or layers, at least one of said silver halide emulsion layers containing tabular silver halide grains having an average diameter to thickness ratio of at least 3:1 and highly deionized gelatin, andshow a swelling index lower than 140% and a melting time of from 45 to 120 minutes.The method shows the advantages of lower environmental pollution and shorter processing times.
    Type: Grant
    Filed: February 22, 1993
    Date of Patent: June 7, 1994
    Assignee: Minnesota Mining and Manufacturing Company
    Inventors: Marco Bucci, Carlo Marchesano, Dino Ferrari, Carlo Illuminati
  • Patent number: 5275915
    Abstract: A developer for light-sensitive material capable of processing in common a negative-working light-sensitive lithographic printing plate and a positive-working light-sensitive printing plate as well as a developing agent-containing type silver halide photographic material, is disclosed. The developer comprises an alkali agent, an anionic surface active agent, an antifoggant for a silver halide photographic material, and an alkylene oxide addition product (molecular weight of from 130 to 1200) of an aromatic amine or an aralkyl amine, and has pH of the range of from 11.5 to 13.5.
    Type: Grant
    Filed: June 2, 1992
    Date of Patent: January 4, 1994
    Assignee: Dainippon Ink and Chemicals, Inc.
    Inventors: Yasuhiko Kojima, Yasuo Shigemitsu
  • Patent number: 5272045
    Abstract: Solid anti-fogging agents such as 5-nitroindazole which are otherwise poorly soluble in water are converted to readily water soluble compositions that are solids at room temperature when they are first dissolved in water soluble polymers or other organic compounds that have a melting point above room temperature and do not chemically react with the anti-fogging agent. The anti-foggants are preferably dissolved in the polymer or organic compound at or near the compounds' melting point below 175.degree.C.
    Type: Grant
    Filed: November 13, 1992
    Date of Patent: December 21, 1993
    Assignee: Sun Chemical Corporation
    Inventors: Dinesh P. Patel, John L. Adkins
  • Patent number: 5264330
    Abstract: There is disclosed a method for processing a silver halide color photographic material containing a yellow coupler represented by formula (Y) with a color developer containing an aromatic primary amine color developing agent and a polymer of vinyl alcohol or vinyl pyrrolidone series. The disclosure described provides a method for development processing wherein yellow stain and processing nonuniformity in a running processing can be prevented effectively.
    Type: Grant
    Filed: March 13, 1991
    Date of Patent: November 23, 1993
    Assignee: Fuji Photo Film Co. Ltd.
    Inventors: Kazuaki Yoshida, Takatoshi Ishikawa
  • Patent number: 5238789
    Abstract: A method for forming an image, comprising developing an imagewise exposed silver halide color photographic material comprising a support having thereon at least one blue sensitive silver halide emulsion layer, at least one green-sensitive silver halide emulsion layer, and at least one red-sensitive silver halide emulsion layer with a color developer containing at least one aromatic primary amine color developing agent, wherein the red-sensitive silver halide emulsion layer contains a high silver chloride silver halide emulsion having a silver bromide content of from 0.5 to 6 mol%, and the color developer contains from 3.5.times.10.sup.-2 to 1.5.times.10.sup.-1 mol/l of chloride ion and from 3.0.times.10.sup.-5 to 1.0.times.10.sup.-3 mol/l of bromide ion. The method provides an image having a high maximum density and a low minimum density at high sensitivity while markedly suppressing variations in photographic characteristics, particularly of minimum density, even in rapid and continuous processing.
    Type: Grant
    Filed: December 9, 1991
    Date of Patent: August 24, 1993
    Assignee: Fuji Photo Film Co., Ltd.
    Inventor: Naoto Ohshima
  • Patent number: 5236815
    Abstract: A new class of photographic masked stabilizers is disclosed showing following general chemical formula (Ia) or (Ib): ##STR1## wherein X and Y each independently represent N or CR, R being hydrogen or lower alkyl,Z represents a lower alkyl group, a nitro group, a halogen atom or hydrogen, andM represents a positive counterion, preferably an alkali cation, ammonium or substituted ammonium.The compounds are demasked by hydrolysis under alkaline conditions. They can be incorporated in a developing solution or in a photographic material, preferably in the backing layer. They show an enhanced solvability in water compared to the corresponding unmasked stabilizers.A preferred compound is 1-(2-sulphonatobenzoyl)-5-nitroindazole trimethylamine, sodium or potassium salt.
    Type: Grant
    Filed: August 3, 1992
    Date of Patent: August 17, 1993
    Assignee: Agfa-Gevaert, N.V.
    Inventors: Jean-Marie O. Dewanckele, Richard A. Ooms, Marc B. Graindourze, Piet Kok
  • Patent number: 5232823
    Abstract: Disclosed is a method for the development of a silver halide light-sensitive black and white material, wherein a silver halide light-sensitive material is developed in the presence of at least one compound represented by the following general formula (I): ##STR1## wherein M represents a hydrogen atom, an alkali metal atom, an ammonium group or a group which is cleaved under alkaline conditions; L represents a bivalent organic group comprising an alkylene group, an alkenylene group, an ether group, a thioether group, --CO--, --CS-- or --NR-- (wherein R represents a hydrogen atom or an alkyl group) alone or a combination of two or more of them; X represents an amino group, an ammonio group, a hydroxyl group or a heterocyclic group; and n represents 0 or 1.
    Type: Grant
    Filed: September 19, 1991
    Date of Patent: August 3, 1993
    Assignee: Fuji Photo Film Co. Ltd.
    Inventors: Kiyoshi Morimoto, Takashi Toyoda
  • Patent number: 5217842
    Abstract: A process of forming superhigh-contrast negative images is disclosed. The process comprises the steps of imagewise exposing a substantially surface latent image-type silver halide photographic material which is spectrally sensitized with a sensitizing dye and then developing said photographic material with a developer, wherein said photographic material contains a heterocyclic thione compound and said developer comprises (a) an aminophenol derivative developing agent, (b) a reductone compound, (c) a quaternary ammonium salt, and (d) a compound represented by formula (I): ##STR1## wherein R.sub.1, R.sub.2 and R.sub.3, which may be the same or different, each represents a hydrogen atom, a nitro group, a halogen atom, or a cyano group, and wherein said development processing is carried out in the existence of at least one kind of a polyalkylene oxide or a derivative thereof. The process provides negative images of superhigh contrast having gamma over 10 substantially free from appearance of pepper.
    Type: Grant
    Filed: September 18, 1991
    Date of Patent: June 8, 1993
    Assignee: Dainippon Ink and Chemical, Inc.
    Inventors: Yasuhiko Kojima, Naoki Obi, Yasuo Shigemitsu
  • Patent number: 5192647
    Abstract: A method for development processing of a light-sensitive silver halide photographic material comprising a support having provided thereon at least one surface latent image type silver halide emusion layer, in the presence of a compound represented by formula (I) ##STR1## wherein Q, X, A, B, M, m and n are as defined above. The method prevents generation of developer fog without reducing sensitivity.
    Type: Grant
    Filed: March 7, 1991
    Date of Patent: March 9, 1993
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Tetsuro Kojima, Shoji Ishiguro, Hisashi Okada, Morio Yagihara