Process Using Lithographic Infectious Developer Patents (Class 430/265)
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Patent number: 4873173Abstract: A method of forming an image is provided. The method comprises the steps of (a) imagewise exposing a photographic material which comprises a support having provided thereon at least one light-sensitive silver halide emulsion layer and which contains a hydrazine compound represented by the following general formula (I) in the emulsion layer or a hydrophilic colloid layer adjacent thereto, the photographic material being designed so that a difference in sensitivity (sensitivity being defined as log E corresponding to the density of fog+2.0) between (1) the photographic material is development-processed with a developing solution having a sulfite ion concentration of 0.15 mole/l or more, a potassium ion concentration of 0.2 mole/l or more and a pH value ranging from 10.5 to 12.3 and (2) the photographic material is development-processed with the same developing solution as described above, except that the pH value was lowered by 1.0, (.DELTA.log E), is 0.Type: GrantFiled: October 21, 1987Date of Patent: October 10, 1989Assignee: Fuji Photo Film Co., Ltd.Inventors: Senzo Sasaoka, Tetsuo Yoshida, Nobuaki Inoue
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Patent number: 4865947Abstract: A negative-type silver halide photographic material comprising a support and at least one light-sensitive silver halide emulsion layer on the support, wherein compounds represented by the general formulae (I) and (II) are incorporated in the light-sensitive silver halide emulsion layer or the hydrophilic colloid layer adjacent thereto. General Formula (I):R.sub.1 --NHNH--G--R.sub.2 (I)General Formula (II):Z.sub.0 --S--Z.sub.1 (II)wherein R.sub.1 is an aliphatic or aromatic group, R.sub.2 is a hydrogen atom, a substituted or unsubstituted alkyl group, a substituted or unsubstituted aryl group, a substituted or unsubstituted alkoxy group, or a substituted or unsubstituted aryloxy group, and G is a carbonyl group, a sulfonyl group, a sulfoxy group, a phosphoryl group, or an N-substituted or unsubstituted imino group, and Z.sub.0 is an alkyl group, an aromatic group, or a heteroaromatic group, said group Z.sub.Type: GrantFiled: August 26, 1988Date of Patent: September 12, 1989Assignee: Fuji Photo Film Co., Ltd.Inventors: Kenichi Kuwabara, Yoshio Inagaki
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Patent number: 4859567Abstract: A method of forming a high contrast negative image is disclosed, comprising developing an imagewise exposed substantially surface latent image-type silver halide photographic material in the presence of a hydrazine derivative with a developer, said developer having a pH of 10.5 to 12.3 and containing(1) a developing agent,(2) not less than 0.25 mol/liter of a sulfite,(3) a compound represented by formula (I):Ar--R.sub.1)n (I),wherein Ar represents an aryl group, and R.sub.1 represents an alkyl group or an alkoxy group and n is an integer of from 1 to 3, and(4) a compound represented by formula (II):R.sub.2 --SO.sub.3 M (II),or a compound represented by formula (III):R.sub.3 --COOM (III),wherein M represents a hydrogen atom, Na, K or NH.sub.4, and R.sub.2 and R.sub.3 each represents an alkyl group having at least 3 carbon atoms, an aryl group or a heterocyclic group.Type: GrantFiled: December 7, 1987Date of Patent: August 22, 1989Assignee: Fuji Photo Film Co., Ltd.Inventors: Eiichi Okutsu, Mitsunori Hirano
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Patent number: 4818662Abstract: A process for forming a color image comprising exposing and heating a light-sensitive material comprising a support having thereon a light-sensitive silver halide, a binder and a compound capable of forming or releasing a mobile dye chemically in connection with reduction of the silver halide into silver upon heating, transferring and fixing the thus formed or released mobile dye to a dye fixing layer, and then separating the portion having the silver halide and the compound capable of forming or releasing a mobile dye and the portion having the dye fixing layer from each other, and wherein polyvinyl alcohol is present in at least one surface layer of the light-sensitive material and the dye fixing layer being separated is disclosed.Type: GrantFiled: February 25, 1987Date of Patent: April 4, 1989Assignee: Fuji Photo Film Co., Ltd.Inventors: Toshiaki Aono, Koichi Nakamura
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Patent number: 4818659Abstract: A silver halide photographic material for use in a bright room is disclosed comprising a support having thereon at least two silver halide emulsion layers, each of the emulsion layers having a different sensitivity and comprising silver chloride grains or silver chlorobromide grains having at least about 80 mol % silver chloride, each of the silver halide emulsions layers containing from about 1.times.10.sup.-7 mol to about 1.times.10.sup.-4 mol of a rhodium salt per mol of silver, wherein the sensitivity of the lower emulsion layer (the emulsion layer coated nearer to the support) is higher than the sensitivity of the upper emulsion layer (the emulsion layer coated farther from the support) and at least one of the silver halide emulsion layers or different hydrophilic colloid layers contains a hydrazine derivative and at least one of the silver halide emulsion layers of different hydrophilic colloid layers contains a dry compound having a .sup..lambda. max of from about 400 nm to about 550 nm.Type: GrantFiled: April 7, 1987Date of Patent: April 4, 1989Assignee: Fuji Photo Film Co., Ltd.Inventors: Toshiro Takahashi, Ken-ichi Kuwabara, Kimitaka Kameoka, Masahiro Okada
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Patent number: 4803149Abstract: A silver halide photographic material for a bright room and a process for producing the photographic material are disclosed, wherein the silver halide photographic material for a bright room comprises a support having thereon at least one silver halide emulsion layer containing silver chloride grains or silver chlorobromide grains containing at least 80 mol % silver chloride, at least one of said silver halide emulsion layer or another hydrophilic colloid layer(s) present containing a yellow dye making the silver halide photographic material substantially insensitive to visible light of 420 n.m. or more and an ultraviolet absorbent in an amount sufficient to reduce the specific sensitivity of the silver halide emulsion at 360 n.m. to 1/2 or lower than 1/2 thereof in the absence of the ultraviolet absorbent, and the .gamma. value of the silver halide photographic material being at least 10.Type: GrantFiled: October 6, 1986Date of Patent: February 7, 1989Assignee: Fuji Photo Film Co., Ltd.Inventors: Toshiro Takahashi, Ken-ichi Kuwabara, Masahiro Okada
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Silver halide photographic material and very high contrast negative image-forming process using same
Patent number: 4789618Abstract: A silver halide photographic material having on a support at least one silver halide emulsion layer is disclosed, wherein the silver halide emulsion layer comprises a silver halide emulsion containing an oxidizing agent added thereto before chemical ripening of the emulsion, and the silver halide emulsion or a hydrophilic colloid layer contains a hydrazine derivative.Type: GrantFiled: May 7, 1986Date of Patent: December 6, 1988Assignee: Fuji Photo Film Co., Ltd.Inventors: Nobuaki Inoue, Senzo Sasaoka, Toshiro Takahashi -
Patent number: 4786584Abstract: A method of supplying a replenishing solution to the processing tank incorporated in an automatic developing machine in which a photosensitive material is processed. In the method, a less active replenishing solution is first supplied to the processing tank at the commencement of the present processing operation of the automatic developing machine prior to our in the course of the processing of the photosensitive material, the less active replenishing solution compensating for the deterioration of a developer due to air during the preceding operating period and the subsequent stop period of the automatic developing machine. A normally active replenishing solution is then supplied to the processing tank after completion of the supply of the less active replenishing solution, the normally active replenishing solution compensating for the deterioration of the developer due to the processing of the photosensitive material.Type: GrantFiled: June 29, 1987Date of Patent: November 22, 1988Assignee: Fuji Photo Film Co., Ltd.Inventor: Yoichi Endo
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Patent number: 4777118Abstract: High contrast negative images are obtained by developing a silver halide photographic element, in the presence of a hydrazine compound, with an alkali aqueous developing solution which contains a combination of developing agent comprising hydroquinone or substituted hydroquinone and a superadditive developing agent and an antioxidant, wherein the developing solution has a pH lower than about 12 and wherein the silver halide photographic element comprises an emulsion layer including surface latent image negative type silver halide grains in reactive association with a contrast promoting agent, preferably a diarylcarbinol compound, more preferably a diarylmethanol compound in a quantity useful to increase contrast.Type: GrantFiled: February 4, 1987Date of Patent: October 11, 1988Assignee: Minnesota Mining and Manufacturing CompanyInventors: Jonathan P. Kitchin, Carlo Marchesano
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Patent number: 4761362Abstract: An image forming process capable of providing photographic images having extremely high contrast and high resolution for use in photoengraving is disclosed, which comprises processing an image-wise exposed silver halide light-sensitive material having at least two silver halide emulsion layers on a support, one of said emulsion layers providing a contrasty gradation and the other of said emulsion layers providing a soft tone gradation, with a hydrazine contrast development system, a tetrazolium contrast development system or a lith development system, wherein the gamma (.gamma.) value of the portion having a density (D) from 0.3 to 1.5 on the characteristic curve obtained is less than 10 and the gamma (.gamma.) value of the portion having a density (D) from 1.5 to 3.0 is at least 10.Type: GrantFiled: December 29, 1986Date of Patent: August 2, 1988Assignee: Fuji Photo Film Co., Ltd.Inventors: Senzo Sasaoka, Shigenori Moriuchi, Kimitaka Kameoka, Kazunobu Katoh, Yoshio Inagaki
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Patent number: 4746594Abstract: A silver halide photographic material for a photomechanical process is disclosed. The material comprises a support having provided thereon at least one light-sensitive silver halide emulsion layer and at least one light-insensitive upper layer disposed on the upper side of the emulsion layer. The light-sensitive upper layer has a greater melting time than the light-sensitive emulsion layer. The emulsion layer contains starch, modified starch and/or macromolecular polysaccharides produced from starch using a microbial fermentation process. The material has greatly improved reduction processability.Type: GrantFiled: March 2, 1987Date of Patent: May 24, 1988Assignee: Fuji Photo Film Co., Ltd.Inventors: Yasuo Kasama, Inoue Nobuaki, Ken-ichi Kuwabara
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Patent number: 4740452Abstract: The present invention provides a process for preparing a negative image of high contrast comprising developing an exposed silver halide photographic material which is substantially a surface latent image-type material in the presence of a hydrazine derivative, wherein said material is processed with a water-soluble alkaline developer having a pH value of from 10.5 to 12.3 and at least comprising the following components (1) through (3):(1) a dihydroxybenzene-type developing agent;(2) 0.3 mole/liter (developer) or more of a sulfite preservative; and(3) from 0.01 to 0.30 mole/liter (developer) of a compound of formula (A) ##STR1## in which R.sub.2 represents an alkyl group having from 3 to 6 carbon atoms; R.sub.3 and R.sub.4 each represents an alkyl or hydroxyalkyl group having from 1 to 10 carbon atoms.The formed negative images are of high contrast and are almost free from silver stain. The sensitivity is high and the dot image quality is good.Type: GrantFiled: May 22, 1986Date of Patent: April 26, 1988Assignee: Fuji Photo Film Co., Ltd.Inventors: Eiichi Okutsu, Mitsunori Hirano
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Patent number: 4735887Abstract: Sharper edges are obtained in silver halide wash-off films for tanning development when from 5 to 60% of the unhardened gelatin binder in one or more layers is replaced with a synthetic amphoteric polymer consisting essentially of at least one of each of three constituents: (a) carboxylic acid, (b) alkyl primary amine, and (c) secondary and/or tertiary amine, the amphoteric polymer having an isoelectric point of from 4 to 8.Type: GrantFiled: June 27, 1986Date of Patent: April 5, 1988Assignee: E. I. Du Pont de Nemours and CompanyInventors: Robert P. Foss, Daniel R. Fruge
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Patent number: 4724196Abstract: A lith-type silver halide photographic material comprising a tetrahydro-1,3,5-triazine-2-thione derivative and a polyalkylene oxide derivative.Type: GrantFiled: March 2, 1987Date of Patent: February 9, 1988Inventors: Tadao Shoji, Yonosuke Tsuka, Naoki Obi, Yasuhiko Kojima, Yasuo Shigemitsu
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Patent number: 4699868Abstract: An alkaline aqueous tanning developing solution for photographic image development comprising at least one hydroxylamine derivative. Preferred formulations may also contain at least one water-miscible polyhydroxy aliphatic organic solvent and/or a developing agent which comprises a polyhydroxybenzene compound having at least two hydroxy groups and at least one electron withdrawing and good leaving group suitable for nucleophilic addition.Type: GrantFiled: August 18, 1986Date of Patent: October 13, 1987Assignee: Minnesota Mining and Manufacturing CompanyInventor: Gebran J. Sabongi
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Patent number: 4699873Abstract: A negative silver halide photographic light-sensitive material comprising a support having provided thereon at least one silver halide emulsion layer is disclosed. At least one of the silver halide emulsion layers or another hydrophilic colloidal layer of the material contains a hydrazine derivative and a compound represented by the formula:R.sub.1 --S--S--R.sub.2wherein R.sub.1 and R.sub.2, which may be the same or different, each represents an aliphatic group, an aromatic group or a heterocyclic group, or when R.sub.1 and R.sub.2 are both aliphatic groups they may together form a ring. The material can rapidly form a superhigh contrast image using a stable processing solution.Type: GrantFiled: January 29, 1986Date of Patent: October 13, 1987Assignee: Fuji Photo Film Co., Ltd.Inventors: Toshiro Takahashi, Shigeo Hirano
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Patent number: 4693956Abstract: A process is disclosed for forming a high-contrast photographic image by developing a silver halide photographic element, including at least a silver halide emulsion layer, with an aqueous alkaline developing solution containing a dihydroxybenzene developing agent, a superadditive developing agent and an antioxidant at a pH of less than 12 in the presence of a hydrazine compound, an organic antifogging and contrast promoting agent selected within the class including a benzotriazole compound and a benzimidazole compound and a non polymeric hydroxymethylidyne group containing compound of formula: ##STR1## wherein R.sub.1 and R.sub.2 each independently represent a hydrogen atom, an aliphatic group, an aromatic group, a heterocyclic group, or R.sub.1 and R.sub.2 together complete a non aromatic cyclic group.Type: GrantFiled: November 15, 1985Date of Patent: September 15, 1987Assignee: Minnesota Mining and Manufacturing CompanyInventor: Carlo Marchesano
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Patent number: 4686167Abstract: Disclosed are novel compounds of the formula: ##STR1## wherein: X=--NR.sub.5 R.sub.6, or --OR.sub.7 ;R.sub.1 and R.sub.2 are independently hydrogen, substituted or unsubstituted alkyl, haloalkyl, hydroxyalkyl alkoxyalkyl, alkylaminoalkyl or arylalkyl having up to 18 carbons; cycloalkyl; phenyl or naphthyl; alkylphenyl, cyanophenyl, halophenyl or alkoxyphenyl substituents.R.sub.3 is hydrogen, benzyl, alkoxybenzyl, halobenzyl or alkylbenzyl, provided that if neither R.sub.1 nor R.sub.2 is hydrogen, then R.sub.3 is hydrogen.R.sub.4 is a divalent aromatic group which is substituted or unsubstituted.R.sub.5, R.sub.6, and R.sub.7 are independently hydrogen, alkyl, hydroxyalkyl, haloalkyl, alkoxyalkyl, alkylaminoalkyl, acylaminoalkyl, aminoalkyl or phenylalkyl having up to 12 carbons; a cycloalkyl substituent; phenyl or naphthyl; an alkylphenyl, cyanophenyl, halophenyl or alkoxyphenyl substituent.Furthermore, either R.sub.1 and R.sub.3 or R.sub.1 and R.sub.Type: GrantFiled: September 26, 1985Date of Patent: August 11, 1987Assignee: Anitec Image CorporationInventors: Bruce M. Resnick, Allan J. Wexler
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Patent number: 4681836Abstract: A silver halide photographic material having at least one silver halide emulsion layer which contains silver halide grains containing from 1.times.10.sup.-8 to 8.times.10.sup.-6 mole of a rhodium salt per mole of silver, and containing in said emulsion layer or another hydrophilic colloidal layer a compound represented by formula (I)R.sup.1 -NHNH-G-R.sup.2 (I)wherein R.sup.1 represents an aliphatic group or an aromatic group; R.sup.2 represents a hydrogen atom, a substituted or unsubstituted alkyl group, a substituted or unsubstituted aryl group, a substituted or unsubstituted alkoxy group, or a substituted or unsubstituted aryloxy group; and G represents a carbonyl group, a sulfonyl group, a sulfoxy group, a phosphoryl group, or an N-substituted or unsubstituted imino group; is exposed to imagewise pattern of light and then development-processed with a developer containing 0.15 mole/liter or more of sulfite ion and having a pH adjusted to from 9.5 to 12.Type: GrantFiled: November 20, 1986Date of Patent: July 21, 1987Assignee: Fuji Photo Film Co., Ltd.Inventors: Nobuaki Inoue, Yoshio Inagaki, Kimitaka Kameoka
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Patent number: 4659647Abstract: A photosensitive silver halide material for obtaining black and white half-tone dot or line images comprises a fine grain and high-chloride silver halide emulsion reactively associated with an aqueous latex of a hydrophobic vinyl addition polymer in combination with a stabilizer selected from the group consisting of 4-hydroxy-1,3,3a,7-tetrazaindenes, benzotriazoles and benzimidazoles. The silver halide emulsion has an average grain size lower than or equal to 0.20 micron with at least 60% of its molar halide content consisting of chloride ions.The material allows high-contrast and high resolving power images to be obtained.The material has a good developability in photographic processings and this reduces the development times and increases productivity.Type: GrantFiled: December 10, 1985Date of Patent: April 21, 1987Assignee: Minnesota Mining and Manufacturing CompanyInventors: Alberto Vacca, Angelo Vallarino
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Patent number: 4636456Abstract: A process for forming photographic image is disclosed, comprising photographically developing, in the presence of a polyalkylene oxide compound, a silver halide photographic light-sensitive material including at least one silver halide emulsion layer and containing in at least said emulsion layer or other hydrophilic layer a compound represented by formula (I). ##STR1## wherein: A and A' each represents a hydrogen atom or an alkalihydrolyzable group;R.sub.1, R.sub.2, and R.sub.3 each represents a group capable of substituting a hydrogen atom on the hydroquinone nucleus, with R.sub.2 and R.sub.3, A and R.sub.1, or A and R.sub.2 together form a ring; andX represents a group which shows a development-inhibiting effect after being released.Type: GrantFiled: May 7, 1985Date of Patent: January 13, 1987Assignee: Fuji Photo Film Co., Ltd.Inventors: Toshiro Takahashi, Koki Nakamura
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Patent number: 4619886Abstract: A process for forming a high contrast negative image by developing an exposed substantial surface latent image type silver halide photographic light-sensitive material in the presence of hydrazines, which comprises using a developing solution having a pH value of 10.5 to 12.3 and containing at least(1) a developing agent,(2) 0.25 mol/l or more of sulfite, and(3) a compound represented by the following general formula (I): ##STR1## wherein R.sub.1, R.sub.2, R.sub.3, R.sub.4 and R.sub.5, which may be the same or different, each represents a hydrogen atom, a hydroxyl group, an alkyl group, an alkoxy group or a substituted alkyl group. According to the process, the development processing time required is shortened in the case of forming a high contrast negative image with a stable developing solution using hydrazines.Type: GrantFiled: March 21, 1985Date of Patent: October 28, 1986Assignee: Fuji Photo Film Co., Ltd.Inventor: Eiichi Okutsu
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Patent number: 4598040Abstract: There is provided a developer for use in a one-step process for the development of exposed film resulting in an exposurewise pattern of silver particles which are large enough to be used as printing elements in ink-printing techniques, providing a wide range of densities in the developed film. The developer is based on a buffered system of a developing agent, a sulfinic acid salt of the type HO-R-SO.sub.2.M..times.H.sub.2 O where R is a hydrocarbyl group and M is a cation, and a formaldehyde source, with conventional adjuvants such as anti-fogging agents and the like. Instead of the sulfinic acid salt defined above there may be used any compound which upon dissociation in a aqueous medium results in the same active ionic species.Type: GrantFiled: September 12, 1983Date of Patent: July 1, 1986Inventors: Yoel Netz, Arnold Hoffman
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Patent number: 4569904Abstract: A method for developing an exposed negative silver halide photographic light-sensitive material is described, in the presence of a hydrazind derivative, comprising treating the material with a developer containing at least components (a) a developing agent, (b) not less than 0.25 mol/liter of a sulfite, and (c) not less than 0.1 mol/liter of a compound having an acid dissociation constant of from 1.times.10.sup.-11 to 3.times.10.sup.-13, and having a pH value of from 10.5 to 12.3.Type: GrantFiled: October 23, 1984Date of Patent: February 11, 1986Assignee: Fuji Photo Film Co., Ltd.Inventors: Eiich Okutsu, Kazumi Watase, Yoshio Inagaki, Shigeo Hirano
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Patent number: 4551412Abstract: A silver halide photographic light-sensitive material for photo-mechanical process comprising a support having thereon at least one light-sensitive silver halide emulsion layer and at least one light-insensitive upper layer which is positioned above the light-sensitive silver halide emulsion layer, wherein at least one of the light-insensitive upper layers has a melting time longer than a melting time of the light-sensitive silver halide emulsion layer and the light-insensitive upper layer contains a polymer latex.The silver halide photographic light-sensitive material has excellent aptitude for reduction treatment without increasing the amount of silver per unit area. The occurrence of reticulation is prevented with the silver halide photographic light-sensitive material.Type: GrantFiled: August 17, 1983Date of Patent: November 5, 1985Assignee: Fuji Photo Film Co., Ltd.Inventors: Masashi Ogawa, Taku Nakamura, Yukihide Urata, Shingo Yamauchi
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Patent number: 4510229Abstract: A lithographic photosensitive material which comprises a support having thereon at least one silver halide emulsion layer and that, contains as a lithographic development accelerating agent a compound represented by the following general formula (I) in its silver halide emulsion layer or another hydrophilic colloidal layer: ##STR1## wherein R.sub.1 to R.sub.5 may be the same or different, and they each represent hydrogen, a halogen atom, an alkyl group, an alkoxy group, an aryl group, ##STR2## (wherein R.sub.6 and R.sub.7 each represents hydrogen or an alkyl group, or they may combine with each other to form a 5- or 6-membered nitrogen containing saturated hetero ring), --NH--CO--R.sub.8 or --NHSO.sub.2 --R.sub.9 (wherein R.sub.8 and R.sub.9 each represents an alkyl group, an aryl group or an aralkyl group), or R.sub.3 and R.sub.4, or R.sub.4 and R.sub.5 may combine with each other to form a benzene ring and that, it is necessary to said compound that at least one of substituents R.sub.1, R.sub.3 and R.sub.Type: GrantFiled: March 19, 1984Date of Patent: April 9, 1985Assignee: Fuji Photo Film Co., Ltd.Inventors: Yutaka Oka, Naomi Saeki, Yoshiharu Fuseya
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Patent number: 4455365Abstract: A silver halide photographic material for a photomechanical process which has an excellent reduction processing aptitude is disclosed. The material is comprised of a support having a light-sensitive silver halide emulsion layer thereon and a light-insensitive layer disposed outside the silver halide emulsion layer. The light-insensitive layer contains a hydrophilic colloidal binder coated in such an amount per unit area as to be 1.0 or more times that of a hydrophilic colloidal binder contained in the silver halide emulsion layer.Type: GrantFiled: August 26, 1982Date of Patent: June 19, 1984Assignee: Fuji Photo Film Co., Ltd.Inventors: Yukihide Urata, Yasuo Kasama, Shigenori Moriuchi, Eiichi Okutsu
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Patent number: 4452882Abstract: A silver halide photographic light-sensitive material and a developing process used in connection with that material are disclosed. The material is comprised of a support having thereon a silver halide emulsion layer containing a silver halide emulsion in which at least 80 mole % of the whole silver halide is composed of silver chloride, the mean grain size thereof is less than 0.4 .mu.m, and which contains more than 1.times.10.sup.-6 mole of a water-soluble rhodium salt per mole of silver at an optional period before finishing the first ripening in the production step for the silver halide emulsion. The material also contains 1.times.10.sup.-5 to 1.times.10.sup.-2 mole of polyalkylene oxide having a molecular weight of at least 600 or a derivative thereof per mole of silver. The process involves imagewise exposing the material and processing it in a developer containing 0.05 to 0.5 mole/liter of a dihydroxybenzene series developing agent, 0 to 0.05 g/liter of an auxiliary developing agent, at least 0.Type: GrantFiled: April 29, 1983Date of Patent: June 5, 1984Assignee: Fuji Photo Film Co., Ltd.Inventors: Yoshitaka Akimura, Eiichi Okutsu, Shigenori Moriuchi, Naomi Saeki, Taiji Hashimura, Hiroyuki Mifune
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Patent number: 4328302Abstract: A lithographic silver halide photographic light-sensitive material is described which scarcely exhibits colored fringe and black pepper, forms halftone dots of good quality whether a fresh or an exhausted developer is used for processing thereof, and which scarcely shows a drop in sensitivity even when a developer contaminated by a fixing solution is used; said material comprises a support and at least one lithographic silver halide emulsion layer, and containing in said emulsion layer or in another hydrophilic colliodal layer which does not contain silver halide emulsion at least one compound represented by formula (I) ##STR1## wherein M represents hydrogen, an alkali metal ion or --NH.sub.4.sup..sym. ; X represents --SO.sub.2 NHR', --COOM', --SO.sub.3 M', --OH or --CONH.sub.2, wherein M' represents hydrogen, an alkali metal ion or --NH.sub.4.sup..sym.Type: GrantFiled: February 9, 1981Date of Patent: May 4, 1982Assignee: Fuji Photo Film Co., Ltd.Inventors: Tatsuo Nishimura, Hiroyuki Mifune, Yoshiharu Fuseya, Yukihide Urata, Tadao Shishido, Yasuo Kasama
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Patent number: 4286044Abstract: A lith-type silver halide photographic material having high sensitivity and providing good dot quality images comprising a support having coated thereon a silver halide emulsion containing a sensitizing dye of dimethine merocyanine type represented by formula (I) and a sensitizing dye represented by formula (II): ##STR1## wherein R.sub.1 represents a sulfoalkyl group, a carboxyalkyl group, a sulfoaralkyl group, or a carboxyaralkyl group; the alkyl moiety of each alkyl group contains up to 4 carbon atoms; R.sub.2 represents a substituted or unsubstituted alkyl group or an aryl group; R.sub.3 represents --(CH.sub.2).sub.n.sbsb.1 CONH(CH.sub.2).sub.m.sbsb.1 OH or --(CH.sub.2).sub.n.sbsb.2 O(CH.sub.2).sub.m.sbsb.2 OH (wherein m.sub.1, m.sub.2, n.sub.1, and n.sub.2 each is 1 to 7; m.sub.1 +n.sub.1 and m.sub.2 +n.sub.Type: GrantFiled: August 8, 1980Date of Patent: August 25, 1981Assignee: Fuji Photo Film Co., Ltd.Inventors: Yuji Mihara, Haruo Takei, Noriyuki Inoue, Tadashi Ikeda, Kenichi Kuwabara
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Patent number: 4269929Abstract: High contrast development of photographic elements, such as lithographic films used in the field of graphic arts, is carried out in the presence of a hydrazine compound with an aqueous alkaline developing solution which has a pH of above 10 and below 12 and contains a dihydroxybenzene developing agent, a 3-pyrazolidone developing agent, a sulfite preservative, and a contrast-promoting amount of an amino compound. The developing solution combines the advantages of high capacity, a high degree of stability, and a long effective life, while providing excellent contrast and speed characteristics.Type: GrantFiled: January 14, 1980Date of Patent: May 26, 1981Assignee: Eastman Kodak CompanyInventor: Ronald J. Nothnagle
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Patent number: 4247620Abstract: A light-sensitive silver halide photographic material which comprises a compound represented by general formula [I] shown below:General formula [I] ##STR1## wherein A represents a phosphorus atom, a nitrogen atom or an arsenic atom; R.sub.1, R.sub.2, R.sub.3 and R.sub.4 each represent a substituted or unsubstituted aryl group; X represents a persulfate ion, a chlorate ion, a bromate ion, an iodate ion or a metal complex anion; and n is an integer of 1 to 4,and a method for processing the same.Type: GrantFiled: June 18, 1979Date of Patent: January 27, 1981Assignee: Konishiroku Photo Industry Co., Ltd.Inventors: Toshio Nagatani, Kazuo Takahashi, Takeshi Habu
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Patent number: 4245034Abstract: Two concentrated solutions (A and B) are used, together with diluting water (W). One concentrate, at a pH below 7, contains hydroquinone, sulphite and sodium formaldehyde bisulphite, whereas the other contains alkali, buffer substances and complexing agents if required. Both concentrates are free from bromine ions. The two concentrates are separated and a variable proportion of water is added to each at the same time as a portion of film to be developed is introduced into a developing tank (11). The concentration of regenerating mixture and the addition of water are controlled in accordance with the machine throughput, i.e. the concentration is high when the machine throughput is low and vice versa. The concentration is regulated by time-controlled proportioning pumps (5, 6, 7) and a three-way valve (8) in the line supplying water for dilution, the valve (8) conveying the water either to the processing tank (11) or back to the proportioning-pump inlet (16), depending on the position of the valve (FIG. 1).Type: GrantFiled: January 12, 1979Date of Patent: January 13, 1981Assignee: Ciba-Geigy AGInventors: Arnost Libicky, Walter E. Mueller
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Patent number: 4233393Abstract: A silver halide photosensitive material capable of providing a relief image after imagewise exposure, tanning development and washing off the non-exposed portions comprising a support having thereon a silver halide emulsion layer, in which the silver halide emulsion layer has thereon a synthetic resin layer which is substantially insoluble in water and permeable to water and has an oleophilic surface.Type: GrantFiled: July 24, 1978Date of Patent: November 11, 1980Assignee: Fuji Photo Film Co., Ltd.Inventors: Keisuke Shiba, Nobuyuki Kita
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Patent number: 4233400Abstract: Light-sensitive silver halide photographic materials to be treated with a hydroquinones-containing developing solution which material comprises a support and at least one hydrophilic colloidal layer coated thereon containing silver halide grains having an average grain size of 0.05 to 1.5.mu. and a tetrazolium compound and a method of processing thereof.Type: GrantFiled: March 2, 1979Date of Patent: November 11, 1980Assignee: Konishiroku Photo Industry Co., Ltd.Inventors: Mitsuto Fujiwhara, Syunji Matsuo, Toyoaki Masukawa, Yutaka Kaneko, Mikio Kawasaki
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Patent number: 4228234Abstract: A method for processing silver halide lithographic photosensitive materials with a lithographic developer using an automatic developing machine, the improvement comprising maintaining constant the development activity of the lithographic developer by adding supplemental amounts of two kinds of replenishers to the lithographic developer with a replenisher (RD) being employed to compensate for the decrease in the development activity of the lithographic developer resulting from the development-processing of lithographic photosensitive materials and a replenisher (RO) being employed to compensate for the decrease in the development activity of the lithographic developer resulting from the passage of time, where replenishers (RD) and (RO) differ in free sulfite ion concentrations, bromide ion concentrations and pH, wherein the method comprises adding a supplemental amount of replenisher (RD) during the development-processing operation as herein defined and, prior to the start of each development-processing operatType: GrantFiled: January 30, 1978Date of Patent: October 14, 1980Assignee: Fuji Photo Film Co., Ltd.Inventors: Eiichi Okutsu, Katsumi Hayashi
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Patent number: 4212672Abstract: A lithographic photosensitive material, suitable for exposure with light from a neon-helium laser, comprising a support having thereon a silver halide emulsion layer containing at least one sensitizing dye represented by the following general formula (I): ##STR1## wherein Z and Z.sub.1, which may be the same or different, each represents the non-metal atoms necessary for completing a 5-membered or 6-membered nitrogen-containing heterocyclic nucleus; R and R.sub.1, which may be the same or different, each represents an alkyl group or an aryl group; Q and Q.sub.1 together represent the non-metal atoms necessary for completing a 4-thiazolidinone, 5-thiazolidinone, or 4-imidazolidinone nucleus; L, L.sub.1 and L.sub.2 each represents a methine group; n.sub.1 and n.sub.Type: GrantFiled: July 12, 1978Date of Patent: July 15, 1980Assignee: Fuji Photo Film Co., Ltd.Inventors: Yuji Mihara, Haruo Takei, Noriyuki Inoue
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Patent number: 4192682Abstract: Process of forming a high-contrast silver image which process comprises treating a light-sensitive silver halide photographic material comprising a support, a silver halide emulsion layer coated thereon and another hydrophilic colloidal layer, at least one of which contains a substantially non-diffusible compound having oxidation power on a hydroquinone developing agent, with a developer containing no hydroquinone developing agent after exposed imagewise.Type: GrantFiled: January 16, 1978Date of Patent: March 11, 1980Assignee: Konishiroku Photo Industry Co., Ltd.Inventors: Yoshio Nishina, Syunji Matsuo, Toshio Nagatani, Kazuo Takahashi, Takeshi Habu
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Patent number: 4180402Abstract: A process for obtaining a half-tone picture of irregular structure consists in exposing a coarse-grained silver-halide material with an average linear size of silver halide micro-crystals of 4 to 6 microns, developing the exposed material in an infectious developer, printing the resulting picture on a high-contract photosensitive material, and developing the exposed high-contract photosensitive material. The process permits obtaining a high-quality half-tone picture with the optical densities of the original being reproducible within the range of more than 1.0. The process is simple and easily controllable.Type: GrantFiled: November 28, 1977Date of Patent: December 25, 1979Assignee: Vsesojuzny Gosudarstvenny Nauchno-Issiedovatelsky I Proekthyinstitut Khimo-Forograficheskoi PromyshlennostiInventors: Jury S. Andreev, Olga V. Pyasetskaya, Galina G. Leonova
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Patent number: 4173477Abstract: A silver halide photographic material comprising an aluminum support having thereon an anodized aluminum oxide layer and a light sensitive silver halide layer containing a silver halide developing agent thereon with a subbing layer containing at least either a silver halide or a developing agent suitable for a silver halide in an amount less than the quantity contained in the light-sensitive layer, which can be used to produce a relief image possessing high printing durability by successively receiving an image-wise exposure, an alkaline solution development, a washing-off and a drying.Type: GrantFiled: July 18, 1977Date of Patent: November 6, 1979Assignee: Fuji Photo Film Co., Ltd.Inventors: Keisuke Shiba, Kikuo Kubotera, Akira Kashiwabara