Identified Silver Halide Grain, Silver Halide Emulsion, Binder Other Than Nominally Defined Gelatin, Or Silver Halide Sensitizer Or Desensitizer Containing Patents (Class 430/230)
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Patent number: 5286622Abstract: There is disclosed the light-sensitive element having a high sensitivity and capable of forming a transferred image with a small fluctuation in a sensitivity and a gradation.Type: GrantFiled: April 30, 1993Date of Patent: February 15, 1994Assignee: Fuji Photo Film Co., Ltd.Inventor: Koukichi Waki
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Patent number: 5272041Abstract: The present invention provides a method for obtaining a negative type lithographic printing plate comprising the steps of (i) image-wise exposing a diffusion transfer reversal imaging element comprising a direct positive silver halide emulsion that mainly forms an internal latent image and a layer containing physical development nuclei, (ii) fogging said image-wise exposed imaging element, (iii) developing said imaging element using a surface developer, (iv) transfering the undeveloped silver salts in the non-exposed areas to said layer containing physical development nuclei and (v) image-wise depositing said silver salts on said physical development nuclei in the presence of physical development restraining compound(s).Type: GrantFiled: October 10, 1991Date of Patent: December 21, 1993Assignee: Agfa-Gevaert, N.V.Inventor: Ludo L. Van Rompuy
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Patent number: 5262271Abstract: According to the present invention a method for producing a negative image is provided, comprising the following steps:image-wise exposing an imaging element comprising on a support, a light-sensitive silver halide emulsion layer comprising silver halide grains having an average volume of not more than 0.02 .mu.m.sup.3 and a layer containing non-light-sensitive water insoluble silver salt, to produce a latent image in said layer of light-sensitive silver halidedeveloping said latent image to produce physical development nuclei of silverdissolving the non-light-sensitive silver salts using a silver salt complexing agent andallowing the thus formed silver salt complexes to diffuse to the layer containing said image-wise formed physical development nuclei of silver to image-wise deposit and develop said silver salt complexes on said image-wise formed physical development nuclei of silver in the presence of (a) developing agent(s).Type: GrantFiled: October 10, 1991Date of Patent: November 16, 1993Assignee: AGFA-Gevaert, N.V.Inventors: Jean-Pierre D. Tahon, Wilhelmus Janssens
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Patent number: 5236805Abstract: A method of image formation by silver salt diffusion transfer in which a photosensitive element which contains an imagewise exposed photosensitive silver halide emulsion layer is developed, in the presence of a silver halide solvent, using an alkaline processing composition, in which at least a portion of the unexposed silver halide in the emulsion layer is converted to a transferable silver complex salt, and in which at least a portion of the silver complex salt is transferred into a silver precipitant containing image forming layer to form an image in the image receiving layer wherein a hydroxylamine developing agent is included in the processing composition and at least two stabilizing compounds having two different heterocyclic rings which are represented by the general formula (I) indicated below are included in the silver halide emulsion layer: ##STR1## wherein Q represents a group of atoms which is required to form a five or six membered heterocyclic ring, and wherein the heterocyclic ring which is forType: GrantFiled: February 28, 1992Date of Patent: August 17, 1993Assignee: Fuji Photo Film Co., Ltd.Inventors: Yoshio Idota, Osami Tanabe, Morio Yatihara
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Patent number: 5206115Abstract: A film unit for use in a silver salt diffusion transfer image-forming process is disclosed. The film unit includes a light-sensitive element, an alkaline treating element, and an image-receiving element. The light-sensitive element includes a light-sensitive silver halide emulsion layer containing a light-sensitive silver halide emulsion which contains silver bromoiodide or silver bromoiodochloride having a silver iodide content of 0.5 to 3.5 mol %, wherein silver bromoiodide having a silver iodide content of 1 to 5 mol % is formed on the surface of the silver halide grains in an amount of from 3 to 10% on a silver basis after completion of chemical sensitization. The alkaline treating element contains a water-soluble iodide in an amount of from 0.3 to 3.0 mM/l and tetrahydrophyrimidinethione in an amount of from 0.3 to 3.0 mM/l. The film unit allows rapid completion of transfer images without loss of photographing sensitivity.Type: GrantFiled: May 20, 1992Date of Patent: April 27, 1993Assignee: Fuji Photo Film Co., Ltd.Inventor: Koukichi Waki
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Patent number: 5202218Abstract: The present invention provides a lithographic printing plate material for silver complex diffusion transfer process by scanning type exposure which comprises a film support and, provided thereon, at least a silver halide emulsion layer and a surface physical development nuclei layer, wherein water content in the whole lithographic printing plate material including the support is 1.5% or less. Preferably, the silver halide emulsion comprises about 95 mol % or more of silver chloride, 90% by weight or more of the silver halide grains have a size within .+-.40% of average grain size, the silver halide grains have an average grain size of about 0.3.mu.-about 1.0.mu., and the surface of the grains is replaced with about 0.1 mol %-about 3.0 mol % of an iodide per 1 mol of the silver halide.Type: GrantFiled: March 19, 1991Date of Patent: April 13, 1993Assignee: Mitsubishi Paper Mills LimitedInventors: Akio Yoshida, Keisuke Iguchi, Hiroyuki Ishikura, Hiroshi Nishinoiri
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Patent number: 5156940Abstract: A new class of photographic stabilizers is prepared and their use in photographic materials is disclosed. These compounds are 1-phenyl-3-pyrazolidinone derivatives corresponding to following general formula: ##STR1## wherein: A represents a group capable of adsorbing at the surface of silver halides;L is a divalent linking group and r is 0 or 1;R1 and R2 each represent hydrogen, lower alkyl or substituted lower alkyl.The photographic materials containing the substances of the invention are preferably DTR mono-sheet elements which after processing can serve as planographic printing plates.Type: GrantFiled: February 13, 1991Date of Patent: October 20, 1992Assignee: AGFA-Gevaert, N.V.Inventors: Piet Kok, Jos A. Vaes, Jean-Marie O. Dewanckele, Luc J. Wabbes
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Patent number: 5102770Abstract: The present invention provides a method for producing a photosensitive material for silver complex diffusion transfer process containing a hydroxybenzene developing agent which comprises coating at least one gelatin-containing coating solution on a support to form photographic layers including a photosensitive layer and drying the coat, said drying being carried out by raising surface wet-bulb temperature of the coat to 14.degree. C. or higher before gelatin concentration in the coat reaches at most about 30% by weight.Type: GrantFiled: November 17, 1989Date of Patent: April 7, 1992Assignee: Mitsubishi Paper Mills LimitedInventors: Susumu Baba, Akio Yoshida, Yasuo Tsubai
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Patent number: 5068165Abstract: Method for making lithographic aluminium offset printing plates according to the DTR-process by photo-exposing a photosensitive monosheet layer assemblage comprising a hydrophilic aluminium foil, a water-swellable intermediate layer comprising a non-protenic hydrophilic film-forming polymer, and a silver halide emulsion layer, applying an aqueous alkaline solution thereto in the presence of a developing agent and a silver halide solvent, allowing to reduce the photo-exposed silver halide, allowing the unreduced silver halide or complexes thereof to diffuse to said aluminium foil to form a silver image thereon, and separating said emulsion layer and said intermediate layer from the image aluminium foil. The invention also relates to the photosensitive monosheet layer assemblage used for making such printing plates.Type: GrantFiled: July 16, 1990Date of Patent: November 26, 1991Assignee: AGFA-Gevaert, N.V.Inventors: Paul J. Coppens, Ludovicus H. Vervloet, Luc H. Leenders, Ronald Schuerwegen
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Patent number: 5059508Abstract: The present invention provides a method of preparing a planographic printing plate comprising the steps of:(1) exposing a DTR mono-sheet material containing a silver halide emulsion layer and a nuclei containing surface layer in a laser beam containing device, e.g. a helium-neon laser, an argon laser, or a semiconductor laser, wherein the said emulsion layer contains at least one emulsion showing following characteristics:(a) the emulsion consists principally of silver chloride but contains bromide ranging from 5 mole % to 40 mole % and iodide ranging from 0 to 1 mole %;(b) the emulsion belongs to the core-shell type wherein substantially all the bromide is concentrated in the core;(c) the emulsion grains contain Rhodium and/or Iridium dopants;(2) processing the DTR material by means of a developing or activator solution, containing at least an alkali agent and a silver halide complexing agent, followed by a neutralization solution.Type: GrantFiled: October 11, 1990Date of Patent: October 22, 1991Assignee: Agfa-Gevaert, N.V.Inventors: Jos A. Vaes, Luc J. Wabbes
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Patent number: 5057395Abstract: Disclosed is a silver complex diffusion transfer process which comprises processing a photosensitve material comprising a support and at least a silver halide emulsion layer provided thereon and an image receiving material comprising a support and at least an image receiving layer provided thereon which are brought into close contact with each other in a developing processing solution. This process is characterized in that said image receiving layer has 1-3 g/m.sup.2 of a hydrophilic colloid at least 80% by weight of which is gelatin; total amount of hydrophilic colloid present on the emulsion layer side of the photosensitive material is 5-8 g/m.sup.2 ; when the materials are immersed in a 0.1N aqueous sodium hydroxide solution at 20.degree. C. for 1 minute, amount of absorbed solution per 1 g of hydrophilic colloid is 3.Type: GrantFiled: November 17, 1989Date of Patent: October 15, 1991Assignee: Mitsubishi Paper Mills LimitedInventors: Yasuo Tsubai, Susumu Baba, Akio Yoshida
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Patent number: 5049475Abstract: A photosensitive material for diffusion transfer process is disclosed according to which characteristic such as high maximum density, high contrast and image reproducibility can be stably obtained. This photosensitive material comprises a support and, provided thereon, a silver halide emulsion layer and a hydrophilic colloid layer and which is processed in contact with an image receiving material in a processing solution for silver complex diffusion transfer process wherein at least one of the silver halide emulsion layer and the hydrophillic colloid layer permeable to water contains a hydroxybenzene developing agent; when the layers on the emulsion layer coated side are immersed in a 0.1N aqueous sodium hydroxide solution at 20.degree. C. for 1 minute, amount of solution absorbed in the layers is 3.5-7.0 ml per 1 g of hydrophilic colloid; and the support comprises a paper coated with polyolefin resin on both sides and has a water content of 5.5%-7.5%.Type: GrantFiled: November 17, 1989Date of Patent: September 17, 1991Assignee: Mitsubishi Paper Mills LimitedInventors: Susumu Baba, Akio Yoshida, Yasuo Tsubai
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Patent number: 5047311Abstract: Disclosed is a panchromatic silver halide photographic emulsion for use in DTR process which exhibits a high sensitivity, especially to blue light, a high contrast and a high resolving power and a photographic element containing said silver halide emulsion layer. Said emulsion contains a blue-sensitizing dye represented by the general formula [I]: ##STR1## (wherein Z.sub.1, Z.sub.2, R.sub.1, R.sub.2, X.sub.1 and m are as defined before).Said emulsion may contain, as green- and red-sensitizing dyes, those represented by the general formula [II] and [III] to attain more effectively the objects: ##STR2## (wherein Z.sub.3, Z.sub.4, Z.sub.5, Z.sub.6, R.sub.3, R.sub.4, R.sub.5, R.sub.6, R.sub.7, R.sub.8, X.sub.2, X.sub.3 and m are as defined before).Said photographic element is an excellent ligtographic printing plate.Type: GrantFiled: February 24, 1987Date of Patent: September 10, 1991Assignee: Mitsubishi Paper Mills Ltd.Inventors: Kazunaka Endo, Kyonosuke Yammamoto, Eiji Kanada, Shigeyoshi Suzuki
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Patent number: 5041354Abstract: A photosensitive material for diffusion transfer process is disclosed which is superior in image reproducibility and running property of when processed with a processing solution for silver complex diffusion transfer process. This photosensitive material is characterized in that total binder amount on the silver halide emulsion coated side of the photosensitive material is 6-8 g/m.sup.2 and when the silver halide emulsion coated side of the photosensitive material is immersed in a 0.1N aqueous sodium hydroxide solution at 20.degree. C. for 1 minute, amount of the solution absorbed and the total binder amount on the emulsion coated side is 3.5:1-5.5:1.Type: GrantFiled: November 17, 1989Date of Patent: August 20, 1991Assignee: Mitsubishi Paper Mills LimitedInventors: Akio Yoshida, Susumu Baba, Yasuo Tsubai
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Patent number: 5030545Abstract: A method of forming images by silver salt diffusion transfer in which a photosensitive element which contains an imagewise exposed photosensitive silver halide emulsion layer is developed in the presence of a silver halide solvent using an alkaline processing composition, wherein at least part of the unexposed silver halide of the emulsion layer is formed into a transferable silver complex salt, at least part of the transferable silver complex salt is transferred to an image receiving layer to yield an image in the image receiving layer, wherein non-photosensitive silver precipitation nuclei are included in the photosensitive element. It is possible to obtain images without metallic luster in a stable manner.Type: GrantFiled: June 8, 1989Date of Patent: July 9, 1991Assignee: Fuji Photo Film Co., Ltd.Inventor: Osami Tanabe
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Patent number: 4959294Abstract: Infra-red sensitizing dyes for silver halide having a mucleus of the general formula: ##STR1## in which: Q represents Cl or Br,R.sup.3 represents an alkyl or substituted alkyl,n is 0, 1, 2 or 3,X is an anion of molecular weight up to 400 which may be incorporated in one R.sup.3 group.Type: GrantFiled: April 14, 1988Date of Patent: September 25, 1990Assignee: Minnesota Mining and Manufacturing CompanyInventors: Bernard A. Lea, Ronald W. Burrows, Thomas D. G. Hellings, Charles G. Barlow, Ivan H. Skoog
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Patent number: 4948699Abstract: This invention provides a silver halide photographic light sensitive material and a light sensitive lithographic printing plate material which are enhanced in sensitivity to semiconductor laser beam and improved in storage stability and printing endurance. The former comprises a support and a silver halide emulsion layer containing a sensitizing dye having a spectral sensitivity maximum in a wavelength region longer than 700 nm wherein said emulsion layer contains a water-soluble polymer containing a carboxyl group and having a number-average molecular weight of 20,000 or less and the latter comprises a support and, provided thereon, a silver halide emulsion layer containing a sensitizing dye having a spectral sensitivity maximum in a wavelength region longer than 700 nm and a physical development nuclei layer and said emulsion layer contains the above mentioned water-soluble polymer.Type: GrantFiled: August 1, 1988Date of Patent: August 14, 1990Assignee: Mitsubishi Paper Mills LimitedInventors: Hiroshi Nishinoiri, Toshiro Kondo, Yoshikazu Takaya
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Patent number: 4873170Abstract: There is provided a method for making a lithographic printing plate having high sensitivity, resolving power and printing endurance and free from scumming utilizing silver complex diffusion transfer process which comprises subjecting to scanning exposure of high-intensity short-time a light sensitive material comprising a support and, provided thereon, at least a silver halide emulsion layer and a physical development nuclei layer as a surface layer and then developing it with a silver complex diffusion transfer developer, the improvement which comprises subjecting the light sensitive material to imagewise exposure with scanning light of at least 700 nm, said emulsion layer containing silver halide grains mainly composed of silver chloride and a sensitizing dye having a sensitivity maximum in the long wavelength region of at least 700 nm in an amount of 3.times.10.sup.-5 -3.times.10.sup.Type: GrantFiled: August 6, 1987Date of Patent: October 10, 1989Assignee: Mitsubishi Paper Mills, Ltd.Inventors: Hiroshi Nishinoiri, Masahiko Saikawa, Yoshikazu Takaya, Euji Kanada
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Patent number: 4845010Abstract: A method for the production of a photographic image by silver complex diffusion transfer processing wherein a negative working silver halide emulsion material having particularly high exposure latitude and being manipulatable under room light conditions without prohibitive fogging is used, said material having a low intensity reciprocity failure (L.I.R.F). The material is contact-exposed with visible light through a sheet support carrying paper paste-up material with its information facing the silver halide emulsion layer of the photographic material, and the resulting latent image is developed in the presence of a silver halide complexing agent and the thus developed silver halide emulsion material is contacted with an image-receiving material to form according to a preferred embodiment a planographic printing plate.Type: GrantFiled: June 9, 1988Date of Patent: July 4, 1989Assignee: Agfa-Gevaert, N.V.Inventors: Paul J. Coppens, Marcel Stroobants, Herman L. Matthe
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Patent number: 4828962Abstract: Photographic elements comprising a negative working silver halide emulsion containing high intensity reciprocity failure reducing amounts of dopant comprising both ruthenium and iridium ions.Type: GrantFiled: September 8, 1987Date of Patent: May 9, 1989Assignee: Minnesota Mining and Manufacturing CompanyInventors: Nicholas E. Grzeskowiak, Keith A. Penfound
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Patent number: 4824760Abstract: A lithographic printing plate made by silver complex diffusion transfer process from a lithographic printing plate material which contains a compound represented by the general formula [I] in photographic constituting layer is markedly improved in its printing endurance: ##STR1## wherein M represents hydrogen, an alkali metal or ammonium ion and R.sup.1 -R.sup.4 each represents hydrogen atom, alkyl group, alkenyl group, aralkyl group, aryl group, halogen atom, alkoxy group, hydroxyl group, amino group, carboxyl group, sulfone group, alkoxycarbonyl group, acylamide group or sulfonamide group and two of R.sup.1 -R.sup.4 may jointly form a ring.Type: GrantFiled: April 7, 1987Date of Patent: April 25, 1989Assignee: Mitsubishi Paper Mills, Ltd.Inventors: Kazuyoshi Yamamoto, Masahiko Saikawa, Eiji Kanada
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Patent number: 4803146Abstract: A method for forming an image with diffusion transfer of silver salts comprising processing a photosensitive element in the presence of a fogging agent.Type: GrantFiled: October 20, 1987Date of Patent: February 7, 1989Assignee: Fuji Photo Film Co., Ltd.Inventors: Noriyuki Inoue, Yoshio Idota, Morio Yagihara
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Patent number: 4784933Abstract: Lithographic printing plates which have such a high sensitivity as permitting use of semiconductor laser beam of low output, a high resolving power and a high printing endurance and are free from occurrence of scumming are made by a method which comprises imagewise exposing a light sensitive material which comprises a support and at least a silver halide emulsion layer and a surface physical development nuclei layer provided on the support, said emulsion layer comprising silver halide grains which contain at least silver bromide and containing at least one sensitizing dye having a maximum spectral sensitivity in the region of longer than 700 .mu.m and then developing the exposed light sensitive material with a silver complex diffusion transfer developer containing at least a thiocyanate. Further improvement can be obtained by providing an antihalation means to keep the reflectance of a light of longer than 700 .mu.m at 13-40%.Type: GrantFiled: November 12, 1986Date of Patent: November 15, 1988Assignee: Mitsubishi Paper Mills, Ltd.Inventors: Eiji Kanada, Yasuo Tsubai, Akira Tanaka, Toshiro Kondo, Yoshikazu Takaya, Masahiko Saikawa, Hiroshi Nishinoiri
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Patent number: 4772535Abstract: Printing characteristics of a lithographic printing plate material using the silver complex diffusion transfer process and comprising a support and a silver halide emulsion layer and a surface physical development nuclei layer are markedly improved when the emulsion layer comprises two emulsion layers, the lower layer of which has substantially no light-sensitivity.Type: GrantFiled: April 7, 1987Date of Patent: September 20, 1988Assignee: Mitsubishi Paper Mills, Ltd.Inventors: Motozo Yamano, Kazunaka Endo, Eiji Kanada
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Patent number: 4770961Abstract: Disclosed is a light sensitive material for lithographic printing plate which comprises a support and at least a silver halide emulsion layer and a surface physical development nuclei layer provided on said support wherein said silver halide emulsion layer contains at least one of the sensitizing dyes represented by the following general formulas (I), (II), (III), (IV) and (V):General formula (I) ##STR1## General formula (II) ##STR2## General formula (III) ##STR3## General formula (IV) ##STR4##Type: GrantFiled: October 30, 1986Date of Patent: September 13, 1988Assignee: Mitsubishi Paper Mills, Ltd.Inventors: Akira Tanaka, Eiji Kanada, Yoshikazu Takaya, Masahiko Saikawa, Hidetoshi Miura
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Patent number: 4743525Abstract: Disclosed is a lithographic printing plate material which comprises a support and at least an undercoat layer, a silver halide emulsion layer and a catalytic layer containing physical development nuclei provided in this order on said support and which utilizes silver complex diffusion transfer process, wherein content of calcium ion in at least one of lime treated gelatin-containing layers is 1000 ppm or less.Type: GrantFiled: October 24, 1986Date of Patent: May 10, 1988Assignee: Mitsubishi Paper Mills, Ltd.Inventors: Kazuyoshi Yamamoto, Eiji Kanada, Kyonosuke Yamamoto, Satoshi Katano
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Patent number: 4728596Abstract: A light-sensitive element for the silver salt diffusion transfer method is described, comprising a support bearing thereon at least a light-sensitive silver halide emulsion layer containing silver iodide, wherein at least one layer for trapping on iodide ion is provided between the support and the emulsion layer. This light-sensitive element provides a silver image which is improved in fading and discoloration during storage.Type: GrantFiled: January 22, 1986Date of Patent: March 1, 1988Assignee: Fuji Photo Film Co., Ltd.Inventors: Hideki Takaki, Yukio Karino, Noriyuki Inoue
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Patent number: 4693955Abstract: Disclosed is a light-sensitive photographic element for negative type lithographic printing plates high in sensitivity and contrast which comprises a support having thereon a light-sensitive silver halide, a metal salt particle having substantially no light-sensitivity, a compound which reacts with an oxidized developing agent produced by development to release a compond which acts as a solvent or a solution physical development accelerator for said metal salt particle and physical development nuclei.Type: GrantFiled: March 18, 1985Date of Patent: September 15, 1987Assignee: Mitsubishi Paper Mills, Ltd.Inventors: Koichi Torizuka, Kiyoshi Futaki
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Patent number: 4689287Abstract: A silver salt diffusion transfer photographic element which can provide a positive print having good stability is disclosed, comprising (1) a light-sensitive element including a light-sensitive silver halide emulsion layer containing silver iodide, and (2) an image-receiving element including a support and an image-receiving layer containing silver-depositing nuclei, with said image-receiving element having an iodide ion-capturing layer between said support and said image-receiving layer.Type: GrantFiled: January 22, 1986Date of Patent: August 25, 1987Assignee: Fuji Photo Film Co., Ltd.Inventors: Kazunobu Katoh, Hideki Takaki
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Patent number: 4686170Abstract: Photographic silver complex diffusion transfer reversal process wherein the photographic material is spectrally sensitized with a dye corresponding to the general formula of the description, wherein said dye provides to the silver halide emulsion layer a spectral sensitivity mainly in the range of 400 to 500 nm and does not extends its spectral sensitivity substantially beyond 500 nm, and wherein the handling (exposure, development and diffusion transfer) of the photographic material during said steps is effected in yellow safelight corresponding to the light transmitted by a specified cut-off filter without causing fog.Type: GrantFiled: April 4, 1986Date of Patent: August 11, 1987Assignee: Agfa-Gevaert N.V.Inventors: Leon L. Vermeulen, Theofiel H. Ghys, Willy P. De Smedt, Ludovicus H. Vervloet, Paul R. Callant
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Patent number: 4686174Abstract: A photographic material for the production of continuous tone silver images by the diffusion transfer reversal process using at least two independently prepared silver halide emulsions of different photo-sensitivity and having a silver halide composition as defined in the description, either in admixture in a single supported emulsion layer or coated on the same support as separate superposed emulsion layers.Type: GrantFiled: January 7, 1986Date of Patent: August 11, 1987Assignee: Agfa-Gevaert N.V.Inventors: Rene M. De Keyzer, Jos A. Vaes, Jules R. Berendsen
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Patent number: 4677052Abstract: A silver salt diffusion transfer photographic material is described, having a silver halide emulsion layer comprising silver halide grains wherein at least 80 percent of the total number of said silver halide grains are accounted for by coarse silver halide grains larger than about 0.8 .mu.m in diameter and fine silver halide grains of from about 0.1 .mu.m to about 0.4 .mu.m in diameter, and said fine silver halide grains constitute from 0.1 to 5 percent of the total weight of silver halide grains and from 10 to 90 percent of the total number of silver halide grains.Type: GrantFiled: November 14, 1986Date of Patent: June 30, 1987Assignee: Fuji Photo Film Co., Ltd.Inventor: Noriyuki Inoue
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Patent number: 4659646Abstract: A silver salt diffusion transfer photographic material is described, having a silver halide emulsion layer comprising silver halide grains wherein at least 80 percent of the total number of said silver halide grains are accounted for by coarse silver halide grains larger than about 0.6 .mu.m in diameter and fine silver halide grains smaller than about 0.4 .mu.m in diameter, and said fine silver halide grains constitute at least 10 percent of the total number of silver halide grains.Type: GrantFiled: June 18, 1985Date of Patent: April 21, 1987Assignee: Fuji Photo Film Co., Ltd.Inventor: Noriyuki Inoue
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Patent number: 4654297Abstract: This invention provides a high sensitivity photosensitive element used for a silver salt diffusion transfer process and capable of producing an image having fine graininess and good quality. The photosensitive element comprises a photosensitive emulsion layer containing silver halide grains having small grain size (S layer) and another photosensitive emulsion layer containing silver halide grains having large grain size (L layer), the S layer being positioned toward the exposure side of the L layer, and the amount of silver halide contained in the S layer, the amount thereof contained in the L layer and the total amount thereof being 60-5 wt %, 40-95 wt %, and no less than 80 wt %, respectively, relative to the total amount of silver halide contained in the photosensitive element.Type: GrantFiled: September 5, 1985Date of Patent: March 31, 1987Assignee: Fuji Photo Film Co., Ltd.Inventor: Noriyuki Inoue
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Patent number: 4639407Abstract: A heat-developable light-sensitive material containing a light-sensitive silver halide and an organic silver salt oxidizing agent is disclosed. The material can imagewise produce a movable silver salt under a high temperature condition in the presence of a reducing agent and a silver halide solvent.Type: GrantFiled: March 18, 1985Date of Patent: January 27, 1987Assignee: Fuji Photo Film Co., Ltd.Inventors: Toshiaki Aono, Hiroshi Hara
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Patent number: 4629678Abstract: An internal latent image-type direct positive silver halide light-sensitive material is described, comprising a support having at least one photographic emulsion layer thereon, wherein said layer contains internal latent image-type direct positive silver halide grains, the surfaces of which are chemically sensitized, wherein a compound of the general formula (I) is added as a finish additive to the photographic emulsion layer or at least one hydrophilic colloid layer adjacent to the photographic emulsion layer.General Formula (I): ##STR1## wherein R.sub.1, R.sub.2 and R.sub.3 are defined as herein. The light-sensitive material exhibits a very satisfactory reversal performance and is greatly improved in stability over the course of time.Type: GrantFiled: October 29, 1984Date of Patent: December 16, 1986Assignee: Fuji Photo Film Co., Ltd.Inventor: Ashita Murai
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Patent number: 4569898Abstract: A photosensitive element comprising a support carrying a layer of photosensitive silver halide grains and a barrier polymer, said barrier polymer having a limited swell ratio in alkali; said barrier polymer being disposed substantially intermediate said silver halide grains and overlying said silver halide grains. In a preferred embodiment, the silver halide layer is a planar, spaced array of silver halide grains.Type: GrantFiled: November 23, 1984Date of Patent: February 11, 1986Assignee: Polaroid CorporationInventor: F. Richard Cottrell
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Patent number: 4562140Abstract: Disclosed is a photosensitive material which comprises a support and at least an undercoating layer and a silver halide emulsion layer, said undercoating layer containing a matting agent having an average particle size larger than the thickness of the undercoating layer. Use of this photosensitive material for diffusion transfer process causes neither slipping between the photosensitive material and the image receptive layer nor pinholes in silver images.Type: GrantFiled: October 11, 1984Date of Patent: December 31, 1985Assignee: Mitsubishi Paper Mills, Ltd.Inventors: Isao Kohmura, Jun Miura, Norio Kajima
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Patent number: 4550070Abstract: Direct positive silver halide photographic light-sensitive materials are described in which at least one layer of light-sensitive silver halide photographic emulsion layers and other hydrophilic colloid layers applied on a base contains a mercapto compound represented by the following general formula (I) or (II) as a nucleating agent: ##STR1## wherein Z, L.sub.1, L.sub.2, L.sub.3, R.sub.1, R.sub.2, R.sub.3, R.sub.4, R.sub.5 and m are as defined in the specification. The nucleating agents can also be added to processing solutions.Type: GrantFiled: April 27, 1984Date of Patent: October 29, 1985Assignee: Fuji Photo Film Co., Ltd.Inventors: Tsutomu Miyasaka, Hidetoshi Kobayashi, Isamu Itoh, Shigeo Hirano
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Patent number: 4510228Abstract: Disclosed is a photosensitive element for the production of lithographic printing plates improved in printing endurance comprising a support, a physical development nuclei layer, and at least one gelatin-containing layer including a silver halide emulsion layer disposed under said nuclei layer, which is adapted to the silver complex diffusion transfer process to utilize the transferred silver image on said nuclei layer as ink-receptive areas, all of the gelatin-containing layers having a pH value below the isoelectric point of the gelatin used in each layer. Further improvement can be attained by using a photographic gelatin and a low molecular weight gelatin in at least one of said gelatin-containing layers.Type: GrantFiled: April 20, 1983Date of Patent: April 9, 1985Assignee: Mitsubishi Paper Mills, Ltd.Inventors: Yasuo Tsubai, Yoshikazu Takaya, Eiji Kanada
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Patent number: 4501811Abstract: Disclosed is a process for making a lithographic printing plate by utilizing the silver complex diffusion transfer process and using a neon-helium laser or an LED which comprises imagewise exposing to the radiation a photosensitive element including an emulsion layer which is spectrally sensitized with an anion- or betaine-type meso-substituted trimethine cyanine dye having at least one .beta.-naphthothiazole nucleus and developing the element by the silver complex diffusion transfer process.Type: GrantFiled: October 13, 1983Date of Patent: February 26, 1985Assignee: Mitsubishi Paper Mills, Ltd.Inventors: Masahiko Saikawa, Eiji Kanada, Akira Tanaka, Kazunaka Endo
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Patent number: 4476213Abstract: A self-contained silver halide diffusion transfer imaging sheet is provided which contains three layers on a substrate. The first layer is a silver halide emulsion formed in a non-ionic material. The intermediate layer is a water barrier. The third layer is a nucleating region which contains colloidal silver. A developer, base and silver transport agent can also be located in these layers. For example, the base and silver transport agent can be located in the nucleating layer, with the developer located in the emulsion layer. After the emulsion is exposed to actinic radiation, a non-aqueous activating medium is supplied which initiates the development and diffusion transfer processes. The final result is a positive image in the nucleating layer.Type: GrantFiled: December 10, 1982Date of Patent: October 9, 1984Assignee: The Mead CorporationInventors: Paul C. Adair, Amy L. Burkholder, Homer G. Duda, Richard F. Wright, Mary M. Stanley
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Patent number: 4401753Abstract: Photographic silver halide material suitable for use in the silver complex diffusion transfer reversal process for the production of a continuous tone positive silver image (sensitometric curve I of the drawing) on an image-receiving material and a continuous tone negative silver image (sensitometric curve II of the drawing) in the photographic silver halide material itself, wherein the negative silver image is usable per se for serving as an internegative in a photographic printing process. In the photographic material on each side of a transparent support a silver halide emulsion layer high in silver chloride is present with a different developing agent composition to yield from the two emulsion layers together the total silver image density and average gradient desired in the negative image.Type: GrantFiled: May 10, 1982Date of Patent: August 30, 1983Assignee: Agfa-Gevaert N.V.Inventors: Jos A. Vaes, Jozef P. De Prijcker
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Patent number: 4309499Abstract: A black-and-white negative image forming process is disclosed using a diffusion transfer type film unit. An exposed silver halide emulsion comprising internal latent image type silver halide grains which have substantially no fogging centers at their surface is processed with a composition comprising a silver halide solvent, a developing agent, a foggant, alkali and a fog promoting agent. The solvent for the silver halide characteristically possesses a solubilizing power for AgBr of from about 2.times.10.sup.-5 to 5.times.10.sup.-3 mol/l in a 0.002 molar aqueous solution.Type: GrantFiled: November 14, 1979Date of Patent: January 5, 1982Assignee: Fuji Photo Film Co., Ltd.Inventors: Yoshihiro Takagi, Katsumi Hayashi
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Patent number: 4302526Abstract: The negative materials of this invention for silver complex diffusion transfer process provide silver images high in density and improved in stability on image receiving materials. Said negative materials have the following characteristics:(a) The negative materials have silver halide emulsion layer in which the weight ratio of hydrophilic colloid to silver halide in terms of silver nitrate is 2 or less and(b) furthermore, the negative materials have an undercoat layer of hydrophilic colloid on a support and the silver halide emulsion layer of (a) on said undercoat layer, the weight ratio of the hydrophilic colloid of said undercoat layer to that of said silver halide emulsion layer being at least 2.Type: GrantFiled: November 6, 1979Date of Patent: November 24, 1981Assignee: Mitsubishi Paper Mills, Ltd.Inventors: Isao Kohmura, Tamotsu Iwata, Shozi Oka
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Patent number: 4302525Abstract: Photosensitive silver halide emulsions for use in diffusion transfer processes are stabilized without adversely affecting spectral sensitization by the following steps: (a) spectrally sensitizing the silver halide grains; (b) lowering the pH of the emulsion from a first pH of the emulsion subsequent to chemical ripening to a pH of about 5.5 to 4.0 and/or increasing the Br ion/Ag ratio to at least 5 mg Br ion/gAg and, subsequent to steps (a) and (b), (c) adding 5-80 mg/gAg to said emulsion of a stabilizer selected from the group consisting of an hydroxy triazaindene, an amino triazaindene, an hydroxy tetrazaindene, an amino tetrazaindene, an hydroxy pentazaindene and an amino pentazaindene.Type: GrantFiled: February 15, 1980Date of Patent: November 24, 1981Assignee: Polaroid CorporationInventors: T. Nelson Baker, III, Bernard Zuckerman
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Patent number: 4298677Abstract: A silver diffusion transfer photographic process using a silver halide photosensitive emulsion layer comprising silver iodochlorobromide or silver iodobromide wherein the iodide comprises from about 6 to 25 mole % of the halide content.Type: GrantFiled: June 9, 1980Date of Patent: November 3, 1981Assignee: Fuji Photo Film Co., Ltd.Inventors: Yoshihiro Takagi, Masakado Sakai
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Patent number: 4242436Abstract: A photographic material suited for use in the silver complex diffusion transfer process and comprising at least one water-permeable layer and including a hydrophilic colloid silver halide emulsion layer in which the silver halide comprises a mixture of silver chloride and silver iodide and/or silver bromide, at least 90 mole % based on the total molar weight of the silver halide being silver chloride, and the ratio by weight of hydrophilic colloid to silver halide expressed as silver nitrate is between about 3:1 and about 10:1, wherein said at least one of the water-permeable layers contains a mixture of developing agents comprising an o-dihydroxybenzene and a 3-pyrazolidinone, the molar amount of the o-dihydroxybenzene in the mixture being larger than the molar amount of the 3-pyrazolidinone.Type: GrantFiled: November 7, 1978Date of Patent: December 30, 1980Assignee: AGFA-GEVAERT N.V.Inventors: Ludovicus M. Mertens, Leon L. Vermeulen
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Patent number: 4175965Abstract: An improved direct offset printing plate high in photographic speed which utilizes silver complex diffusion transfer is obtained by using as a silver halide emulsion a direct positive silver halide emulsion which comprises silver halide grains which contain at least 80 mol % of bromide, the surface of said silver halide grains having thereon an electron acceptor and at least one sensitizing dyes selected from the group consisting of those having the following general formula (I): ##STR1## and those having the following general formula (II): ##STR2## (wherein Z, R.sub.1 -R.sub.3, M, A and p and q are as defined in the specification).Type: GrantFiled: October 27, 1977Date of Patent: November 27, 1979Assignee: Mitsubishi Paper Mills, Ltd.Inventors: Akio Yoshida, Yasuo Tsubai, Seigo Ebato