Stabilizer-preservative Patents (Class 430/490)
  • Patent number: 5391467
    Abstract: A method for continuously processing a silver halide color photographic photosensitive material by treating this material with a color developer containing at least one aromatic primary amine color developing agent, comprises the steps of covering the surface of a color developer replenisher in a color developer replenisher tank with a layer of a floating fluid and replenishing 20 to 100 ml of the color developer replenisher per m.sup.2 of the photosensitive material to a color developing tank. This method makes it possible to inhibit the formation of the precipitate in the color developer replenisher caused when the amount of the replenisher is considerably reduced and also to inhibit the change of the photographic characteristics by change of the amount of the processed photosensitive material so that the amount of the color developer replenisher can be remarkably reduced to the range of 20 to 100 ml per square meter of the photosensitive material and that of the waste water can be also remarkably reduced.
    Type: Grant
    Filed: June 8, 1994
    Date of Patent: February 21, 1995
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Kazuaki Yoshida, Akira Abe
  • Patent number: 5385811
    Abstract: A method for processing silver halide photographic material is disclosed, which has a support thereon at least one silver halide emulsion layer and at least one protective layer provided over said emulsion layer in which each of the photographic materials contains colloidal silica in at least one emulsion layer and is at most 200% in the total swelling degree of the whole hydrophilic colloid layers provided on the side of said emulsion layer, and after optical exposure said photographic materials are developed with a developer adjusted to pH 9.5-12.0 and containing at least (1) a hydroquinone developing agent in a concentration of from 0.2 to 0.75 mole/l, (2) an auxiliary developing agent of 1-phenyl-3-pyrazolidone type and/or an auxiliary developing agent of p-aminophenol type in a concentration of from 0.001 to 0.06 mole/l, (3) free sulfite ions in a concentration of from 0.3 to 1.
    Type: Grant
    Filed: April 28, 1994
    Date of Patent: January 31, 1995
    Assignee: Fuji Photo Film Co., Ltd.
    Inventor: Mitsunori Hirano
  • Patent number: 5382507
    Abstract: A method for processing a first black-and-white silver halide photographic light-sensitive material comprising a hydrazine compound and a second black-and-white silver halide photographic light-sensitive material comprising a tetrazolium compound is disclosed, a photographic layer on the side of a silver halide emulsion layer of each material containing gelatin in an amount of not more than 3.0 g per m.sup.2 of the material, and the process comprising the step of exposing the light-sensitive materials and developing the exposed materials with the same developer having a pH of from 9.5 to 10.7, the developer being replenished with developer replenisher in an amount of not more than 250 cc per m.sup.2 of the light-sensitive materials to be developed.
    Type: Grant
    Filed: January 19, 1994
    Date of Patent: January 17, 1995
    Assignee: Konica Corporation
    Inventors: Akira Shimizu, Shoji Nishio, Takeshi Sanpei, Hiroyuki Ushiroyama
  • Patent number: 5380624
    Abstract: A novel process is provided for processing a silver halide color photographic material with a color developing solution containing at least one aromatic primary amine color developing agent, wherein said silver halide color photographic material contains at least one of anti-bacterial agents represented by the general formulas (I), (II), (III), (IV) and (V) and that the processing is effected while said color developing solution is supplied in an amount of 20 to 120 ml per 1 m.sup.2 of said silver halide color photographic material.
    Type: Grant
    Filed: September 27, 1993
    Date of Patent: January 10, 1995
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Kazuaki Yoshida, Takatoshi Ishikawa, Yoshihiro Fujita, Genichi Furusawa
  • Patent number: 5372911
    Abstract: A process of forming a super high-contrast negative image is disclosed, which comprises the steps of imagewise exposing a negative-working silver halide photographic material comprising a support having thereon one or more hydrophilic colloidal layers, at least one of the one or more hydrophilic colloidal layers being a negative-working silver halide emulsion layer, and then developing the photographic material with a developer containing an aminophenol derivative developing agent and a reductone compound in the existence of an organic compound having a negative reduction potential. A negative-working silver halide photographic material and a photographic developer being used for the image-forming process are also disclosed.
    Type: Grant
    Filed: June 11, 1992
    Date of Patent: December 13, 1994
    Assignee: Dainippon Ink and Chemicals, Inc.
    Inventors: Naoki Obi, Yasuhiko Kojima, Yasuo Shigemitsu, Jun Takeuchi, Kiyoshi Suematsu
  • Patent number: 5364746
    Abstract: A developer for developing a silver halide photographic material is disclosed. The developer comprises a compound represented by Formula 1 or Formula 2; ##STR1## wherein R.sub.1, R.sub.2, R.sub.3, and R.sub.4 are each a hydrogen atom or an alkyl group having 1 to 3 carbon atoms provided that both of R.sub.1 and R.sub.2 are not hydrogen atoms at the same time; R.sub.5 is a hydroxy group, an amino group or an alkyl group having 1 to 3 carbon atoms; R.sub.6 and R.sub.7 are each a hydrogen atom, an alkyl group having 1 to 5 carbon atoms, an acyl group having 1 to 18 carbon atoms or a --COOM.sub.2 group, provided that both of R.sub.1 and R.sub.2 are not hydrogen atoms at the same time, in the above M.sub.1 is a hydrogen atom, an alkali metal atom or an ammonium group; m is an integer 0, 1 or 2; and M.sub.2 is a hydrogen atom, an alkyl group having 1 to 4 carbon atoms, an alkali metal atom, an aryl group or an aralkyl group having not more than 15 carbon atoms.
    Type: Grant
    Filed: March 23, 1994
    Date of Patent: November 15, 1994
    Assignee: Konica Corporation
    Inventors: Kenichi Inoue, Tsuyoshi Mitsuhashi
  • Patent number: 5362610
    Abstract: A solid photographic processing agent for a silver halide photographic light-sensitive material is disclosed. It has a bulk density of 0.5 to 6.0 g/cm.sup.3, and comprises a photographic processing agent and at least one of the compounds represented by the following Formula (I):Formula (I)R--(O).sub.n SO.sub.3 Xwherein R represents an alkyl group having 1 to 8 carbon atoms, a phenyl group or a polymer chain having a repetition unit derived from an ethylenically unsaturated group; X represents a hydrogen atom, an alkali metal or an ammonium group; and n is an integer of 0 or 1.
    Type: Grant
    Filed: February 17, 1994
    Date of Patent: November 8, 1994
    Assignee: Konica Corporation
    Inventor: Hiroshi Yoshimoto
  • Patent number: 5354646
    Abstract: A method of colour-developing a silver halide colour light-sensitive material having plural silver halide emulsion layers each containing substantially silver chlorobromide. At least one of the layers has a silver chloride content of not less than 20 mol %, and a colour developer being used in the colour developing method contains the compounds each represented by the following formula [I]: ##STR1## According to the processing method, a colour photographic image having a satisfactory colour density can be obtained by a rapid development process and the excellent preservability for a long standing of the colour developer can be displayed.
    Type: Grant
    Filed: March 7, 1994
    Date of Patent: October 11, 1994
    Assignee: Konishiroku Photo Industry Co., Ltd.
    Inventors: Kazuhiro Kobayashi, Shigeharu Koboshi, Masao Ishikawa, Masayuki Kurematsu, Yoko Matsushima
  • Patent number: 5342741
    Abstract: A developer composition having improved stability to aerial oxidation, which contains at least one compound represented by formulae (A) and (B): ##STR1## where R.sub.1 and R.sub.2 each represent a hydroxyl group, an amino group, an acylamino group, an alkylsulfonylamino group, an arylsulfonylamino group, an alkoxycarbonylamino group, a mercapto group or an alkylthio group; and X represents a group of atoms selected from carbon and nitrogen which forms a 5-membered or 6-membered ring together with the two vinyl carbons substituted by R.sub.1 and R.sub.2, respectively, and the carbonyl carbon of formula (A); ##STR2## where R.sub.3 and R.sub.
    Type: Grant
    Filed: July 9, 1993
    Date of Patent: August 30, 1994
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Kiyoshi Morimoto, Shin-ichi Morishima, Hiroshi Hayakawa
  • 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: 5300410
    Abstract: Disclosed is a developer for silver halide photographic light-sensitive material which contains at least one of the compounds represented by the following formulas [I], [II] and [III]:Formula [I]: ##STR1## wherein M represents a hydrogen atom, an alkali metal or NH.sub.4 and A and B each represents a mercapto group, a hydroxyl group, a hydroxyalkyl group, or ##STR2## wherein R.sub.1 and R.sub.2 each represents a hydrogen atom or --X--Y group in which X represents a divalent group and Y represents a carboxyl group or a hydroxyl group,Formula [II]: ##STR3## wherein M represents a hydrogen atom, an alkali metal or NH.sub.4, A' represents an organic divalent group, and B' represents --SO.sub.3 M', --COOM', --SO.sub.2 NHR.sub.3, --CONHR.sub.3, or --OH wherein M' represents a hydrogen atom, an alkali metal atom or NH.sub.4, and R.sub.
    Type: Grant
    Filed: February 22, 1993
    Date of Patent: April 5, 1994
    Assignee: Mitsubishi Paper Mills Limited
    Inventors: Sukeaki Date, Eiichi Terashima, Toshiro Kondo, Eiji Matsubara, Masao Okushima, Seiichi Sumi
  • Patent number: 5273865
    Abstract: A ready-to-use photographic color developing composition for the development of high bromide silver halide photographic element, said composition being substantially free of bromides, hydroxylamines and benzyl alcohol and comprising a color developing agent, a buffering agent, a complexing agent, an antifogging agent, a contrast promoting agent, an antioxidant agent and a polyol compound.A rapid access processing method of a high bromide silver halide photographic color element, said method comprising the steps of:developing said element for a period of about 75 to about 105 seconds in a ready-to-use color developing composition substantially free of bromides, hydroxylamines and benzylalcohol and comprising a color developing agent, a buffering agent, a complexing agent, an antifogging agent, a contrast promoting agent, an antioxidant agent and a compound of formula:R--(OH).sub.
    Type: Grant
    Filed: April 15, 1991
    Date of Patent: December 28, 1993
    Assignee: Minnesota Mining and Manufacturing Company
    Inventors: Marco Loiacono, Carlo Marchesano
  • Patent number: 5272044
    Abstract: Disclosed is a silver halide photographic material comprising a compound represented by the general formula (I), (II), or a salt thereof or a compound represented by the general formula (III), with these groups being defined as in the specification: ##STR1## also disclosed is a method for the processing of a silver halide photographic material, which comprises processing a silver halide photographic material in the presence of a compound represented by the general formula (I) or (II) or a salt thereof or a compound represented by the general formula (III).
    Type: Grant
    Filed: August 31, 1992
    Date of Patent: December 21, 1993
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Junji Nishigaki, Akihiko Ikegawa, Masaki Okazaki, Minoru Yamada, Nobuhiko Uchino
  • Patent number: 5260185
    Abstract: A concentrated composition of color developer for silver halide color photographic light-sensitive material is disclosed. The composition is excellent in stability during storage for a long period. The composition comprises a specified hydroxyamine derivative and a specific chelating agent. The composition preferably has a pH value of not lower than 10.6.
    Type: Grant
    Filed: August 11, 1992
    Date of Patent: November 9, 1993
    Assignee: Konica Corporation
    Inventors: Naoki Takabayashi, Mitsuhiko Uno, Masaaki Furuya
  • Patent number: 5252439
    Abstract: A method for processing an imagewise exposed color photographic material comprising a support having thereon at least one light-sensitive silver halide emulsion layer comprising a silver halide emulsion containing at least 90 mol % silver chloride, comprising the steps of: (a) developing in a color developing bath; (b) bleaching in a bath having a bleaching ability and fixing in a bath having a fixing ability or bleach-fixing in a bath having a bleaching and fixing ability; and (c) independently supplying a low pH replenisher and a high pH replenisher to the developing bath each in an amount depending on the quantity of photographic material processed, the low pH replenisher having a pH of from 2 to 6 and mainly containing a color developing agent and the high pH replenisher containing one or more components of the developing bath, wherein the components of the each replenisher are sufficiently diluted upon addition to the developing bath to avoid formation of a precipitate by mixing with the components of th
    Type: Grant
    Filed: June 3, 1992
    Date of Patent: October 12, 1993
    Assignee: Fuji Photo Film Co., Ltd.
    Inventor: Koichi Nakamura
  • Patent number: 5250396
    Abstract: A method of continuously processing an imagewise exposed silver halide photographic material using an automatic processor which has a color development bath, comprising the steps of a) developing with a color developer containing an organic preservative, and b) adding to the color developer during the continuous processing (i) a replenisher for the color developer containing a development agent and other components for the development in an amount of from 20 ml to 600 ml per m.sup.2 of the photographic material processed, and (ii) a water solution in an amount of from 0.1 to 1.2 times the amount of the developer which has evaporated from the bath at a frequency of about once per week or more often.
    Type: Grant
    Filed: September 30, 1992
    Date of Patent: October 5, 1993
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Shinji Ueda, Takatoshi Ishikawa, Hiroshi Fujimoto
  • Patent number: 5246819
    Abstract: In accordance with the present invention a method for continuously processing a silver halide color photographic material with a color developer containing at least one aromatic primary amine color-developing agent is disclosed. The silver halide color photographic material at least one of the layers of which contains a silver halide emulsion of a high chloride comprising 80 mol % or over of silver chloride is processed, after exposure to light, with the replenishing amount of the color developer being 20 to 120 ml per m.sup.2 of the silver halide photographic material. The silver halide photographic material contains at least one of pyrazoloazole magenta couplers.
    Type: Grant
    Filed: July 25, 1991
    Date of Patent: September 21, 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: 5236814
    Abstract: A method for processing a silver halide color photographic light-sensitive material comprising a support having thereon a silver halide emulsion layer, comprising steps ofdeveloping said light-sensitive material with a color developerbleaching, after said developing step, said light-sensitive material with a bleaching solution, andtreating, after said bleaching step, said light-sensitive material with a solution having fixing capability, whereinsaid light-sensitive material has a coating weight of silver of not more than 1 g/m.sup.
    Type: Grant
    Filed: September 10, 1991
    Date of Patent: August 17, 1993
    Assignee: Konica Corporation
    Inventors: Satoru Kuse, Shigeharu Koboshi
  • Patent number: 5230991
    Abstract: A method for processing a silver halide color photographic light-sensitive material is discloseed. The method comprises the steps ofdeveloping a silver halide color photographic light-senaitive material which comprises silver halide grains substantially consisting of silver chloride, whith acolor developer, andbleach-fixing said deveoped light-sensitive material with a bleach-fixer containing a water soluble bromide salt in an amount of from 0.01 mol/l to 1.0 mol/l and having a pH value of from 6.5 to 8.5 in a tank in whic said bleach fixer has a surface area opening to air of from 8 cm.sup.2 /l to 100 cm.sup.2 /l.
    Type: Grant
    Filed: October 18, 1991
    Date of Patent: July 27, 1993
    Assignee: Konica Corporation
    Inventors: Shinsaku Nagaoka, Shigeharu Koboshi
  • Patent number: 5204212
    Abstract: An aqueous alkaline processing liquid suitable for use in the silver complex diffusion transfer reversal (DTR-) process, wherein said liquid contains 3-(N,N-diethylamino)propane-1,2-diol and contains phosphate ions in a concentration of not more than 0.03 mol/l.
    Type: Grant
    Filed: December 27, 1991
    Date of Patent: April 20, 1993
    Assignee: Agfa-Gevaert, N.V.
    Inventor: Jean-Pierre D. Tahon
  • Patent number: 5204229
    Abstract: A replenishing solution unit for color-developing a color photographic light-sensitive material is disclosed. The replenishing solution unit comprises at least (1) a replenishing solution containing a color developing agent and a sulfinic acid or a salt thereof and the pH of said replenishing solution is 2 to 6 and (2) a replenishing solution containing a replenishing solution component other than the color developing agent. The replenishing solution unit enables the preparation of a concentrated developing solution and has excellent storage stability over a long period of time without the decrease of photographic sensitivity and the increase of D.sub.min. A method for processing a color photographic light-sensitive material with the above replenishing solution unit is also disclosed.
    Type: Grant
    Filed: November 21, 1991
    Date of Patent: April 20, 1993
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Koichi Nakamura, Masato Taniguchi
  • Patent number: 5196298
    Abstract: A photographic developing solution for immersion development is disclosed showing a pH of at least 12.0 and containing more than 0.4 moles/liter of a sugar derivative, or an alkali metal salt thereof, corresponding to general formula (I): ##STR1## wherein X represents an oxygen atom or an imino group, and n represents a positive integer from 1 to 4, and R represents a hydroxy group when n is 1, and R represents a hydroxy group or a hydrogen atom when n is 2 to 4.Preferred sugar derivatives according to the present invention are l-ascorbic acid and iso-ascorbic acid. In a most preferred embodiment there are substantially no other developing agents and no sulphite ions present. When developing a graphic arts photographic material lith quality is obtained. The disposal of depleted solutions can be performed in an ecologically safe way.
    Type: Grant
    Filed: February 5, 1992
    Date of Patent: March 23, 1993
    Assignee: AGFA-Gevaert, N.V.
    Inventors: Pascal F. Meeus, Peter M. Willems, Gino L. De Rycke
  • Patent number: 5187051
    Abstract: There is disclosed a method for processing a silver halide photographic material comprising processing the silver halide color photographic material containing a prescribed amount of titanium oxide in an water-resistant resin layer on the silver halide color photographic material, with a color developer containing a prescribed amount of chloride ions. The disclosure described provides a method of developing processing wherein edge stain due to penetration of a developing solution from the cut end of the base is prevented and the sharpness of image is excellent.
    Type: Grant
    Filed: January 29, 1991
    Date of Patent: February 16, 1993
    Assignee: Fuji Photo Film Co., Ltd.
    Inventor: Takatoshi Ishikawa
  • Patent number: 5178992
    Abstract: There is disclosed a method for processing a silver halide color photographic material paper base of which contains at least one of specified sizing agents with a color developer containing a hydroxylamine compound. According to the disclosure edge stain due to penetration of the color developer into the paper base is prevented.
    Type: Grant
    Filed: August 29, 1990
    Date of Patent: January 12, 1993
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Kazuaki Yoshida, Hiroshi Fujimoto
  • Patent number: 5162192
    Abstract: An aqueous alkaline processing liquid suitable for use in the silver complex diffusion transfer reversal (DTR-) process, wherein wherein said liquid contains a mixture of alkanolamines, the said mixture consisting of (I) N-methyl-diethanolamine and of (II) N,N-dimethyl-ethanolamine in a total amount in the range from 0.3 mol/l to 1.5 mol/l, and in a molar ratio of (I) to (II) from 1/20 to 20/1.
    Type: Grant
    Filed: September 9, 1991
    Date of Patent: November 10, 1992
    Assignee: Agfa-Gevaert, N.V.
    Inventors: Rene M. De Keyzer, Raymond L. Odeurs, Luc A. De brabandere
  • Patent number: 5155014
    Abstract: Method for the production of direct-positive images by image-wise exposing a light-sensitive silver halide material comprising a support and an internal latent image-type silver halide emulsion layer and developing said exposed material in the presence of at least one development nucleator and density-increasing amounts of a compound chosen from the class consisting of formic acid, oxalic acid, glyoxylic acid, or salts of these and/or of a compound chosen from the class consisting of polyethylene glycols, with a hydroquinone-type developing solution having a pH not higher than 12.0 and comprising less than 25 g per liter of a hydroquinone and 5 to 100 g per liter of at least one alkanolamine.
    Type: Grant
    Filed: August 14, 1991
    Date of Patent: October 13, 1992
    Assignee: Agfa-Gevaert, N.V.
    Inventors: Jozef P. De Prijcker, Fernand I. Ketels, Jean-Marie O. Dewanckele, Piet Kok
  • Patent number: 5153111
    Abstract: A composition for color-development of a silver halide color photographic material and a method for processing such using the same wherein the composition comprises an aromatic primary amine color developing agent, a hydroxylamine compound represented by formula (I) or a hydrazine compound represented by formula (II) and at least one polymer selected from the group consisting of a vinyl alcohol homopolymer, a vinyl alcohol copolymer, a vinylpyrrolidone homopolymer, and a vinylpyrrolidone copolymer, being free from sulfite ion, providing a color photographic image high in maximum density and good in whiteness without causing problems by tarry substance in the color developer.
    Type: Grant
    Filed: January 24, 1991
    Date of Patent: October 6, 1992
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Kazuaki Yoshida, Takatoshi Ishikawa, Tadashi Ogawa, Hiroshi Fujimoto, Junichi Yamanouchi, Tomokazu Yasuda
  • Patent number: 5147766
    Abstract: A method for continuously processing an image-wise exposed silver halide color photographic material comprising a support having thereon at least one silver halide emulsion layer containing 95 mol % or more of silver chloride is disclosed, which comprises the steps of developing the silver halide color photographic material in a color developer and supplying a replenisher to the color developer, the replenisher comprising used color developer and a regenerant wherein components accumulated to the color developer during the continuous processing are not removed from the replenisher. This method does not require a large scale apparatus and provides stable photographic properties without substantially producing waste water and without causing crystallization of chemicals in a replenisher even after repeated regeneration, particularly when varying the amount of light-sensitive material being processed per unit time.
    Type: Grant
    Filed: September 6, 1990
    Date of Patent: September 15, 1992
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Takatoshi Ishikawa, Kazuaki Yoshida, Hiroshi Fujimoto
  • Patent number: 5124229
    Abstract: An aqueous alkaline processing liquid suitable for use in the silver complex diffusion transfer reversal (DTR-) process, wherein said liquid contains one or more alkanolamines, the said alkanolamine(s) consisting of one or more tertiary alkanolamines in an amount in the range from 0.3 mol to 1.5 mol/l, and one or more secondary alkanolamines in an amount from 0 mol % to 5 mol % with respect to the amount of tertiary alkanolamine(s), and said liquid also contains a mixture of a silver image toning agent A being 1-phenyl-1H-tetrazole-5-thiol or a tautomer thereof and at least one other silver image toning agent B being a 1-phenyl-1H-tetrazole-5-thiol or a tautomer thereof, wherein the phenyl nucleus is substituted with halogen, the toning agent A and toning agent(s) B being present in said liquid in a molar ratio from 1/15 to 15/1.
    Type: Grant
    Filed: May 17, 1990
    Date of Patent: June 23, 1992
    Assignee: AGFA-Gevaert, N.V.
    Inventors: Rene M. De Keyzer, Raymond L. Odeurs, Luc A. De Brabandere
  • Patent number: 5110713
    Abstract: A method for continuously processing silver halide color photographic material with a color developer containing at least one aromatic primary amine color-developing agent is disclosed. In the method a silver halide color photographic material at least one of the layers of which contains a silver halide emulsion of a high chloride comprising 80 mol % or over of silver chloride is processed in the presence of a specific heterocyclic compound, after exposure to light, with a color developer that is substantially free from sulfite ions and whose replenishing amount is 120 ml or below per m.sup.2 of the silver halide photographic material, to attain desired photographic characteristics.
    Type: Grant
    Filed: March 27, 1991
    Date of Patent: May 5, 1992
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Kazuaki Yoshida, Takatoshi Ishikawa
  • Patent number: 5108880
    Abstract: A water soluble alkaline developer composition useful in the development of exposed silver halide photographic material comprised of a developing agent, a sulfite preservative and a small but effective amount of an amino alcohol compound of the formula ##STR1## wherein each R.sub.1 is a C.sub.2 -C.sub.4 alkyl group and R.sub.2 is a moiety having the structure: (R.sub.1 O).sub.x --R.sub.1 OH wherein x is an integer of from 1 to 3, and R.sub.1 is as defined hereinabove.
    Type: Grant
    Filed: December 20, 1990
    Date of Patent: April 28, 1992
    Assignee: Sun Chemical Corporation
    Inventor: John L. Adkins
  • Patent number: 5100765
    Abstract: A method for processing a silver halide color photographic material is disclosed which comprises processing an imagewise exposed silver halide color photographic material comprising a support having thereon at least one silver halide emulsion layer containing silver halide having a silver iodide content of at least 2 mol % with a color developing solution, wherein said color developing solution contains at least one compound represented by formula (I), bromide ion in an amount of from 1.0.times.10.sup.-2 to 5.0.times.10.sup.-1 mol per liter and iodide ion in an amount of not more than 1.0.times.10.sup.
    Type: Grant
    Filed: October 30, 1990
    Date of Patent: March 31, 1992
    Assignee: Fuji Photo Film Co., Ltd.
    Inventor: Hiroshi Fujimoto
  • Patent number: 5098819
    Abstract: An environmentally-safe, non-toxic non-hydroquinone and non-alkali metal hydroxide containing photographic developer composition is provided comprising a developer selected from the group consisting of ascorbic acid and sugar-type derivatives thereof, stereoisomers and diastereoisomers of ascorbic acid and its sugar-type derivatives, their salts and mixtures thereof, together with a sulfite, an alkali metal carbonate, and a 3-pyrazolidone developer compound.
    Type: Grant
    Filed: January 28, 1991
    Date of Patent: March 24, 1992
    Inventor: Audenried W. Knapp
  • Patent number: 5094937
    Abstract: There is disclosed a method for processing a silver halide color photographic material with a color developer containing a hydroxylamine compound and at a small opened surface ratio of the color developer by using an automatic processor. According to the disclosure, a rapid development excellent in decreasing the fluctuation of photographic properties for a high-silver-chloride silver halide color photographic material can be carried out.
    Type: Grant
    Filed: July 31, 1990
    Date of Patent: March 10, 1992
    Assignee: Fuji Photo Film Co., Ltd.
    Inventor: Kiyoshi Morimoto
  • Patent number: 5093226
    Abstract: A method for forming an image of a silver halide color photograph, which comprises processing a silver halide color photographic material with a color developing solution containing at least one aromatic primary amine color developing agent, comprises: processing a silver halide color photographic material having at least one layer containing a compound represented by formula (S) and a silver halide emulsion comprising at least 80 mol % of silver chloride with a color developing solution containing chlorine ion in an amount of 3.5.times.10.sup.-2 to 1.5.times.10.sup.-1 mol/l and bromine ion in an amount of 3.0.times.10.sup.-5 to 1.0.times.10.sup.-3 mol/l: ##STR1## wherein Z.sub.1 represents a nitrogen atom, an oxygen atom, a sulfur atom or a selenium atom; Z.sub.2 represents an oxygen atom, a sulfur atom or a selenium atom; L.sub.1, L.sub.2, L.sub.3, L.sub.4 and L.sub.5 each represents a methine group which may be optionally substituted or may be combined together with another methine group to form a ring; R.
    Type: Grant
    Filed: October 3, 1989
    Date of Patent: March 3, 1992
    Assignee: Fuji Photo Film Co., Ltd.
    Inventor: Naoto Ohshima
  • Patent number: 5082765
    Abstract: A method of processing a light-sensitive silver halide color photographic material wherein a light-sensitive silver halide photographic material having a support and provided thereon at least one silver halide emulsion layer containing a dye-forming coupler and silver halide grains which are sensitized with specific sensitizing dyes, is processed with a color developer solution containing specific aromatic primary amine color developing agents.
    Type: Grant
    Filed: October 15, 1990
    Date of Patent: January 21, 1992
    Assignee: Konica Corporation
    Inventors: Kaoru Onodera, Keiji Ohbayashi, Mitsuhiro Okumura, Shigeo Chino
  • Patent number: 5077180
    Abstract: A method for continuously processing silver halide color photographic material with a color developer containing at least one aromatic primary amine color-developing agent is disclosed. In the method a silver halide color photographic material at least one of the layers of which contains a silver halide emulsion of a high chloride comprising 80 mol % or over of silver chloride is processed, after exposure to light, with a color developer that is substantially free from sulfite ions and whose replenishing amount is 120 ml or below per m.sup.2 of the silver halide photographic material, to attain desired photographic characteristics.
    Type: Grant
    Filed: March 4, 1991
    Date of Patent: December 31, 1991
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Kazuaki Yoshida, Takatoshi Ishikawa
  • Patent number: 5077179
    Abstract: A method for processing silver halide photosensitive materials comprises replenishing each of replenishers to water washing process and/or stabilization process in an amount of 1 to 50 times the volume of a solution carried over from a bath preceding the water washing process and/or the stabilization process per unit area of the photosensitive material and limiting the amount of calcium compounds included in a layer for constituting photograph of the photosensitive material to not more than 25 mg/m.sup.2 on the basis of the weight of elemental calcium. The method makes it possible to effectively suppress the contamination of the processed photosensitive materials, the increase in turbidity of the water washing and/or stabilization bath solutions and the proliferation of bacteria or molds in these baths. These effects are further enhanced by reducing the amount of calcium and magnesium present in the replenishers for washing and/or stabilization.
    Type: Grant
    Filed: October 9, 1987
    Date of Patent: December 31, 1991
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Akira Abe, Yoshihiro Fujita, Nobuo Sakai
  • Patent number: 5071734
    Abstract: A method for continuously processing silver halide color photographic materials using a roller conveyor type of an automatic developing apparatus, comprising:cleaning the entire surface of a roller located over solution surface of at least one of processing baths in the automatic developing apparatus in which at least one of said processing baths comprises the color developing bath by a rinsing water replenisher or a stabilizing replenisher as a substitute for the rinsing water replenisher, andintroducing the cleaning solution into the color developing bath containing at least one organic preservative selected from the group consisting of compounds represented by formulae (I), (II), (III) and (IV) and monosaccharides; ##STR1## wherein R.sup.11 and R.sup.12 each represents hydrogen atoms, unsubstituted or substituted alkyl groups, unsubstituted or substituted alkenyl groups, unsubstituted or substituted aryl groups or hetero aromatic groups, provided that both of R.sup.11 and R.sup.
    Type: Grant
    Filed: September 28, 1989
    Date of Patent: December 10, 1991
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Shinji Ueda, Takatoshi Ishikawa, Hiroshi Fujimoto, Kaoru Uchiyama, Tetuya Ishizuka
  • Patent number: 5066571
    Abstract: A method for processing a silver halide color photosensitive material is disclosed.The method comprises developing a color photographic light-sensitive material composed of a support having thereon at least one light-sensitive silver halide emulsion layer containing a silver halide comprising at least 98 mol % silver chloride;in a color developer solution comprising a primary amine color developing agent, and having a chloride ion concentration of from 4.times.10.sup.-2 to 1.times.10.sup.-1 mol/l, and a bromide ion concentration of from 5.times.10.sup.-5 to 5.times.10.sup.-4 mol/l.When used in rapid processing methods, the method according to the invention prevents fogging streaks, and provides high maximum density and low minimum density images.
    Type: Grant
    Filed: October 3, 1989
    Date of Patent: November 19, 1991
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Kazuaki Yoshida, Takatoshi Ishikawa
  • Patent number: 5064751
    Abstract: A method for processing a silver halide color photographic material including the step of developing the silver halide color photographic material with a color developing solution containing at least one aromatic primary amine developing agent and at least one hydrazide represented by the following formula (I) or (II)R.sup.1 --X.sup.1 --NHNH--R.sup.2 (I)in whichX.sup.1 represents --CO--, --SO.sub.2 -- or ##STR1## R.sup.1 represents a hydroxyl group, a hydroxyamino group, carbamoyl group, a hydrazinocarbonyl group, an amino group, or a hydrazino group; and R.sup.2 represents a hydrogen atom, an alkyl group, or an aryl group; provided that the R.sup.1 or R.sup.2 groups of at least two of the hydrazide groups may be linked to form a dimer or higher polymer of the hydrazide.R.sup.3 --X.sup.2 --NHNH--R.sup.4 (II)in whichX.sup.2 represents --CO-- or --SO.sub.2 --; R.sup.3 represents a hydrogen atom, an alkyl group, an aryl group, a heterocyclic group, an alkoxy group, or an aryloxy group; and R.sup.
    Type: Grant
    Filed: January 23, 1991
    Date of Patent: November 12, 1991
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Nobutaka Ohki, Kazuto Andoh, Hideaki Naruse, Hiroshi Fujimoto, Jiro Tsukahara, Morio Yagihara, Takatoshi Ishikawa
  • Patent number: 5063136
    Abstract: An aqueous alkaline processing liquid suitable for use in the silver complex diffusion transfer (DTR-) process, wherein said liquid contains one or more alkanolamines, the said alkanolamine(s) consisting of one or more tertiary alkanolamines in an amount in the range from 0.15 mol to 1.5 mol/l, and one or more secondary alkanolamines in an amount higher than 5 mol % but not higher than 100 mol % with respect to the amount of tertiary alkanolamine(s), and said liquid also contains a mixture of a silver image toning agent A being 1-phenyl-1H-tetrazole-5-thiol or a tautomer thereof and at least one other silver image toning agent B being a 1-phenyl-1H-tetrazole-5-thiol or a tautomer thereof, wherein the phenyl nucleus is substituted with halogen, the toning agent A and toning agent(s) B being present in said liquid in a molar ratio from 1/15 to 15/1.
    Type: Grant
    Filed: May 17, 1990
    Date of Patent: November 5, 1991
    Assignee: AGFA-Gevaert, N.V.
    Inventors: Rene M. De Keyzer, Raymond L. Odeurs, Luc A. De brabandere
  • Patent number: 5055381
    Abstract: In a method for processing silver halide photosensitive materials comprising developing an exposed silver halide photosensitive material, fixing the developed material and washing it with a washing water, the amount of calcium and magnesium compounds present in the replenishing washing water is reduced to not more than 5 mg/l on the basis of the weight of elemental calcium or magnesium and washing water is replenished in an amount of 1 to 50 times the volume of liquid carried over by the photosensitive material from a bath preceding the washing bath per unit area thereof or that the replenishing washing water is introduced into a washing bath after reducing the amount of calcium and magnesium compounds to the range mentioned above and sterilizing the same. The method makes it possible to substantially reduce the amount of washing water while reliably suppressing turbidity and proliferation of microorganisms in the washing water during and after completion of processing.
    Type: Grant
    Filed: June 3, 1987
    Date of Patent: October 8, 1991
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Akira Abe, Yoshihiro Fujita, Toshio Koshimizu
  • Patent number: 5053322
    Abstract: A method for processing a silver halide color photographic material is disclosed, comprising a support having a thin film of metal or metal oxide on a substrate; said thin film having mirror surface reflection properties or secondary diffuse reflection properties and having a surfaced reflectance of at least 0.5; said photographic material having thereon, in order outwardly from the support, an adhesive layer and at least one light-sensitive silver halide emulsion layer, by the steps which comprise developing the silver halide color photographic material with a developing bath containing a color developing agent and at least one compound represented by formulae (I), (II), (III) or (IV): ##STR1## wherein M each represents hydrogen, an alkali metal or an ammonium group; and R.sub.1 represents a lower alkyl group; ##STR2## wherein R.sub.2 R.sub.3 and R.sub.4 each represents --COOM, --PO.sub.3 M.sub.
    Type: Grant
    Filed: October 27, 1989
    Date of Patent: October 1, 1991
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Keisuke Shiba, Akira Abe
  • Patent number: 5037727
    Abstract: Potassium iodide (or a related iodide) when incorporated in an alkaline activator for use in a rapid access processor using developer-incorporated, resin-coated paper, (i) produces a cold image tone in black-and-white photographic prints, and (ii) maintains the image tone of a large number of prints within a narrow image tone range over a (one week or one thousand 8.times.10 inch print) design life of the activator solution.
    Type: Grant
    Filed: July 9, 1990
    Date of Patent: August 6, 1991
    Assignee: Eastman Kodak Company
    Inventor: Donald F. McLaen
  • Patent number: 5034308
    Abstract: A method for processing silver halide photosensitive materials comprising developing an exposed silver halide photosensitive material, fixing the developed photosensitive material and then washing it with a washing water, the washing water used in the water washing process being replenished in an amount of 2 to 50 times the volume of liquid carried over by the photosensitive material from a bath preceding the water washing bath per unit area thereof, the amount of calcium and magnesium compounds present in the water washing bath being reduced to not more than 5 mg/l, respectively, on the basis of elemental calcium and magnesium and the washing water containing at least one chelating agent having a stability constant of a chelate, which is formed between the chelating agent and calcium or magnesium, of at least 6 is herein disclosed.
    Type: Grant
    Filed: August 19, 1987
    Date of Patent: July 23, 1991
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Akira Abe, Yoshihiro Fujita, Toshio Koshimizu, Kazuhiro Aikawa
  • Patent number: H1020
    Abstract: A developer for developing a silver halide light-sensitive material and an image forming method using the developer are disclosed. The developer contains a compound represented by the following formula I or II and a compound containing a thioether group. ##STR1## wherein Y, Y.sub.1 and Y.sub.2 are each a hydrogen atom or a mercapto group, and R and R.sub.1 are each a substituent. A silver halide light-sensitive material containing silver halide grains comprising not less than 50 mol % of silver chloride and have a ratio of (100) surface and (111) surface of not less than 5 is preferably used in the image forming method. Developing speed and sensitivity of light-sensitive material can be rised by use of the developer.
    Type: Grant
    Filed: September 21, 1990
    Date of Patent: February 4, 1992
    Assignee: Konica Corporation
    Inventors: Syoji Nishio, Kazuhiro Yoshida
  • Patent number: RE33964
    Abstract: A method of processing a silver halide color photographic material in which the color developer used comprises an aromatic primary amine color developing agent and a compound of formula: ##STR1## wherein X represents a trivalent group necessary to complete a condensed ring;R.sup.1 and R.sup.2 each represents an alkylene group, an arylene group, an alkenylene group, or an aralkylene group;and, if desired, does not contain a substantial amount of benzyl alcohol to achieve improved stability and color developability of the color developer and a reduction of fog generation in the running development process.
    Type: Grant
    Filed: September 11, 1990
    Date of Patent: June 16, 1992
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Takatoshi Ishikawa, Hiroshi Fujimoto, Nobutaka Ohki, Morio Yagihara