Silver Halide Colloid Tanning Process, Composition, Or Product Patents (Class 430/264)
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Patent number: 6426179Abstract: This invention relates to an imaging element, such as a photographic or photothermographic element comprising a silver halide emulsion layer, wherein the element also comprises a compound of Structure I: wherein the substituents are as defined in the specification.Type: GrantFiled: December 30, 1999Date of Patent: July 30, 2002Assignee: Eastman Kodak CompanyInventors: Wojciech K. Slusarek, Xiqiang Yang, Mark E. Irving, David H. Levy
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Patent number: 6420081Abstract: The invention relates to a process for the production of a photosensitive recording material for the production of offset printing plates which comprises a dimensionally stable, two-dimensional support of a metal or metal alloy and a silver halide-containing, photosensitive layer on the front of the support and a layer which essentially consists of an organic polymeric material and is resistant to processing chemicals on the back of the support. The layer on the back of the support is applied before the photosensitive coating on the front. The invention furthermore relates to a corresponding recording material in which the layer on the back comprises at least one organic polymer having a glass transition temperature Tg of 50° C. or above. Due to the back coating, the formation of local elements between the metallic support and the silver-containing layer is reliably prevented when the recording materials are stacked.Type: GrantFiled: April 26, 2001Date of Patent: July 16, 2002Assignee: AGFA-GevaertInventors: Andreas Elsässer, Michael Dörr, Steffen Denzinger, Paul Coppens
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Patent number: 6420102Abstract: Thermographic and photothermographic materials comprise a barrier layer to provide physical protection and to prevent migration of diffusible imaging components and by-products resulting from high temperature imaging and/or development. The barrier layer comprises a film-forming acrylic or methacrylic acid ester or amide polymer(s) that has a molecular weight of at least 8000 g/mole and comprises hydroxy functionality in from about 15 to 100 mole % of the acrylic or methacrylic acid ester or amide recurring units. This barrier layer is capable of retarding diffusion of mobile chemicals such as fatty carboxylic acids, developers, and toners. This barrier layer can also include at least one other film-forming polymer to provide a clear and scratch-resistant surface.Type: GrantFiled: July 27, 2001Date of Patent: July 16, 2002Assignee: Eastman Kodak CompanyInventors: Charles L. Bauer, Michelle L. Horch, Anne M. Miller, David M. Teegarden, Bryan V. Hunt, Kumars Sakizadeh
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Patent number: 6416924Abstract: A silver halide photographic material is described, which comprises a support having provided thereon at least one light-sensitive silver halide emulsion layer and at least one light-insensitive hydrophilic colloid layer, wherein the at least one light-sensitive silver halide emulsion layer contains at least two kinds of silver halide emulsions having different speeds, the light-insensitive hydrophilic colloid layer contains at least one kind of light-insensitive silver halide grains, the silver halide emulsion layer or the light-insensitive hydrophilic colloid layer contains at least one kind of hydrazine derivative as a nucleating agent, and at least one kind of compound selected from the group consisting of an amine derivative, an onium salt, a disulfide derivative and a hydroxymethyl derivative as a nucleation accelerator. A method for processing the silver halide photographic material is also described.Type: GrantFiled: November 16, 2000Date of Patent: July 9, 2002Assignee: Fuji Photo Film Co., Ltd.Inventors: Yutaka Oka, Tokuju Oikawa
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Patent number: 6395466Abstract: A heat-developable image recording material containing an organic silver salt, a reducing agent and an organic binder characterized in that the reducing agent comprises a combination of two or more different kinds of reductive compounds exhibiting superadditivity was disclosed.Type: GrantFiled: April 12, 2000Date of Patent: May 28, 2002Assignee: Fuji Photo Film Co., Ltd.Inventors: Kazunobu Katoh, Minoru Sakai
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Publication number: 20020061483Abstract: A black and white graphic arts film comprising a support having thereon at least one emulsion layer, said emulsion layer comprising:Type: ApplicationFiled: August 10, 2001Publication date: May 23, 2002Applicant: Eastman Kodak CompanyInventor: Julie Baker
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Publication number: 20020058195Abstract: A high contrast photographic material is disclosed containing a new type of hydrazine compound characterized in that said hydrazine compound comprises a redox moiety capable of developing an exposed silver halide crystal.Type: ApplicationFiled: September 7, 2001Publication date: May 16, 2002Inventors: Johan Loccufier, Stefaan Lingier
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Patent number: 6387604Abstract: A processing method which thermally develops a thermally developable photosensitive material which is exposed imagewise, comprising the step of thermally developing said thermally developable photosensitive material using heating element which intermittently heats and has duration time of surface temperature of not less than 250° C. to be not more than 1 second, wherein said thermally developable photosensitive material comprising a support having thereon one layer or plural layers; containing organic silver salt, photosensitive silver halide grains and a reducing agent.Type: GrantFiled: January 26, 1999Date of Patent: May 14, 2002Assignee: Konica CorporationInventor: Takeshi Sampei
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Patent number: 6383711Abstract: A high contrast photographic material comprises a support bearing a silver halide emulsion layer, containing in the emulsion layer or in an adjacent hydrophilic layer, a hydrazide nucleating agent characterized in that the emulsion layer contains silver halide grains of octahedral character which are spectrally sensitized and silver halide grains which are not octahedral in character eg cubic. Preferably only the grains which are octahedral in character are spectrally sensitized. Preferably the emulsion layer or an adjacent hydrophilic colloid layer contains a booster compound eg an amine rendering the material developable in a developer solution having a pH below 11. Preferably both types of grain are chemically sensitized. The use of tabular grains as causer emulsions enhances the absorption characteristics of the dyes so that as well as providing high photographic sensitivity the dye peaks are broadened.Type: GrantFiled: August 21, 2000Date of Patent: May 7, 2002Assignee: Eastman Kodak CompanyInventors: Jurjen F. Winkel, Michael B. Ledger
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Publication number: 20020048716Abstract: Disclosed in an image recording material comprising, on a support, a photosensitive silver halide, a reducing agent, a binder and a compound represented by the following Formula (1): 1Type: ApplicationFiled: July 24, 2001Publication date: April 25, 2002Inventors: Katsuyuki Watanabe, Masaru Takasaki
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Patent number: 6376165Abstract: A method of preparing a photothermographic material, comprising a support having thereon at least a layer, the method comprising the steps of: coating a coating solution containing an organic silver salt, a photosensitive silver halide and a reducing agent on the support to form a coated material and subjecting the coated material to a thermal treatment at a temperature of 40 to 120° C. under a tension of 0.01 to 30 kg/cm2.Type: GrantFiled: September 15, 2000Date of Patent: April 23, 2002Assignee: Konica CorporationInventors: Hidetoshi Ezure, Kenji Ohnuma, Yuji Hosoi
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Patent number: 6376166Abstract: A heat-developable photosensitive material which comprises, on the same side of a support, at least (a) a photosensitive silver halide, (b) a reducible silver salt, (c) a phenol compound represented by the following general formula (1), (d) a binder, and (e) a coupler compound: wherein V1 to V8 each independently represent a hydrogen atom or a functional group; L represents a bridging group consisting of —CH(V9)— or —S—; V9 represents a hydrogen atom or a functional group. The heat-developable photosensitive material causes extremely low fog and is suitable for photomechanical reproduction.Type: GrantFiled: March 30, 2000Date of Patent: April 23, 2002Assignee: Fuji Photo Film Co., Ltd.Inventors: Toyohisa Oya, Katsuyuki Watanabe, Masaru Takasaki, Minoru Sakai
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Publication number: 20020042015Abstract: A color diffusion-transfer photographic light-sensitive material provided with at least two light-sensitive silver halide emulsion layers, each of which is combined with a non-diffusive dye image forming compound forming or releasing a diffusive dye or its precursor in relation to silver development, or with a dye image forming compound whose diffusibility changes in relation to silver development, on a support, the light-sensitive material comprises a specific hydrazine compound and a specific compound improved in storability.Type: ApplicationFiled: March 14, 2001Publication date: April 11, 2002Inventors: Nobutaka Fukagawa, Shinichi Ichikawa, Masaru Yoshikawa
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Patent number: 6361919Abstract: A silver halide photographic photosensitive material is disclosed. The silver halide photographic photosensitive material comprises a hydrazine compound at least one alkyl group which has no atom other than carbon and hydrogen atoms, has three or more branches, and does not bond to aromatic ring directly.Type: GrantFiled: December 14, 1999Date of Patent: March 26, 2002Assignee: Konica CorporationInventors: Norio Miura, Mitsunori Matsuura, Kiyoshi Fukusaka
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Patent number: 6361920Abstract: A high contrast silver halide photographic material is disclosed containing a new type of hydrazide compound represented by following general formula I, the different symbols of which are defined in the description. The photographic material is preferably a graphic arts material for pre-press applications. High gradation and excellent dot quality, exposure latitude and stability on continuous processing are obtained.Type: GrantFiled: September 13, 2000Date of Patent: March 26, 2002Assignee: AGFA GevaertInventors: Johan August Loccufier, Stefaan Lingier, Pascal Frans Meeus
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Patent number: 6358677Abstract: A heat-developable recording material having, at least on one side and the same side of the support, (a) reducible silver salt, (b) a reducing agent other than a compound represented by the general formula (1) below, (c) a binder, and (d) at least one compound represented by the general formula (1) below; content of the compound represented by the general formula (1) being 0.01 to 100 mol % with respect to the reducing agent: [where in the general formula (1), R1, R2, R3, X1 and X2 independently represent a hydrogen atom; halogen atom; or substituent which is bound to the benzene ring via a carbon atom, oxygen atom, nitrogen atom, sulfur atom or phosphorus atom. At least either X1 or X2 represents a group represented as —NR4R5, where R4 and R5 independently represent a group selected from a hydrogen atom, alkyl group and the like.Type: GrantFiled: March 17, 2000Date of Patent: March 19, 2002Assignee: Fuji Photo Film Co., Ltd.Inventors: Masahiko Taniguchi, Katsuyuki Watanabe, Shigeo Hirano, Minoru Sakai
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Patent number: 6355394Abstract: A high contrast silver halide photographic material is disclosed containing a new type of hydrazide compound represented by following general formula I, the different symbols of which are defined in the description. The photographic material is preferably a graphic arts material for pre-press applications. High gradation and excellent dot quality, exposure latitude and stability on continuous processing are obtained.Type: GrantFiled: September 7, 2000Date of Patent: March 12, 2002Assignee: Agfa GevaertInventors: Johan August Loccufier, Stefaan Lingier, Pascal Frans Meeus
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Publication number: 20020028403Abstract: The invention relates to a process for the production of a photosensitive recording material for the production of offset printing plates which comprises a dimensionally stable, two-dimensional support of a metal or metal alloy and a silver halide-containing, photosensitive layer on the front of the support and a layer which essentially consists of an organic polymeric material and is resistant to processing chemicals on the back of the support. The layer on the back of the support is applied before the photosensitive coating on the front. The invention furthermore relates to a corresponding recording material in which the layer on the back comprises at least one organic polymer having a glass transition temperature Tg of 50° C. or above. Due to the back coating, the formation of local elements between the metallic support and the silver-containing layer is reliably prevented when the recording materials are stacked.Type: ApplicationFiled: April 26, 2001Publication date: March 7, 2002Inventors: Andreas Elsasser, Michael Dorr, Steffen Denzinger, Paul Coppens
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Patent number: 6352819Abstract: High contrast thermographic and photothermographic materials comprise a barrier layer to prevent migration of diffusible by-products resulting from high temperature development. The barrier layer comprises a film-forming polymer(s) that reacts with or acts as a physical barrier to diffusible by-products resulting from development including formic acid, hydrazo compounds, azo compounds, diimide compounds, hydrazine, and water.Type: GrantFiled: December 1, 2000Date of Patent: March 5, 2002Assignee: Eastman Kodak CompanyInventors: Raymond J. Kenney, Paul G. Skoug, Takuzo Ishida, Lawrence B. Wallace
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Publication number: 20020025488Abstract: A heat developable light-sensitive material comprises a support, a light-sensitive layer and a non-light-sensitive layer. The light-sensitive layer contains silver halide and a reducing agent.Type: ApplicationFiled: August 20, 2001Publication date: February 28, 2002Applicant: FUJI PHOTO FILM CO., LTD.Inventors: Masami Sakurada, Masaki Noro, Itsuo Fujiwara, Yoshiharu Yabuki
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Patent number: 6350568Abstract: A photothermographic image recording element has on a support a photosensitive layer containing a non-photosensitive organic silver salt, a photosensitive silver halide, and a binder, wherein the organic silver salt has been formed in the presence of a tertiary alcohol. The photosensitive layer and/or a layer disposed adjacent thereto contains a nucleating agent. Alternatively, the photosensitive layer contains the silver halide which has been formed independent from the organic silver salt and added during preparation of a coating solution, and the main binder is a polymer latex having a Tg of −30° C. to 40° C. The element shows low fog, high contrast, and high sensitivity.Type: GrantFiled: February 9, 1999Date of Patent: February 26, 2002Assignee: Fuji Photo Film Co., Ltd.Inventor: Kazuki Yamazaki
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Patent number: 6342342Abstract: A photothermographic image forming element contains a non-photosensitive silver salt which has been formed by simultaneously adding and mixing previously prepared solutions of silver nitrate and an organic acid alkali metal salt. A photosensitive layer containing a photosensitive silver halide or a layer disposed adjacent thereto or both contain a nucleating agent. The element produces a low fog, high contrast image.Type: GrantFiled: March 23, 1999Date of Patent: January 29, 2002Assignee: Fuji Photo Film Co., Ltd.Inventor: Kazuki Yamazaki
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Publication number: 20020009665Abstract: A method of processing a silver halide photographic material is disclosed, comprising on a support a light sensitive silver halide emulsion layer, wherein the light-sensitive layer contains a spectral-sensitizing dye represented by formula (1-a); a developer solution contains a developing agent represented by formula (A); and the replenishing rate of a processing solution is determined based on the proportion of an exposed area per unit area of the photographic material to perform replenishment.Type: ApplicationFiled: January 29, 2001Publication date: January 24, 2002Inventor: Junichi Fukawa
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Patent number: 6338941Abstract: A silver halide light sensitive photographic material is disclosed, comprising a support and at least one hydrophilic colloid layer including a silver halide emulsion layer, wherein the hydrophilic colloid layer comprises a compound represented by the following formula. An image forming method by use thereof is also disclosed.Type: GrantFiled: July 6, 2000Date of Patent: January 15, 2002Assignee: Konica CorporationInventors: Toshiyuki Takabayashi, Takeo Arai
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Patent number: 6331386Abstract: A photothermographic element has a non-photosensitive organic silver salt, a photosensitive silver halide, and a binder on a support. A polymer latex constitutes at least 50% by weight of the binder in an image forming layer containing the photosensitive silver halide. The image forming layer has been formed by applying a coating solution in which at least 60% by weight of a solvent is water. The image forming layer contains a specific compound as a nucleating agent and has been formed by applying a coating solution having added thereto a water dispersion of the compound. The element exhibits a high contrast, long-term storage stability, and no increase of Dmin upon printing to PS plates.Type: GrantFiled: April 28, 1999Date of Patent: December 18, 2001Assignee: Fuji Photo Film Co., Ltd.Inventors: Toshihide Ezoe, Kohzaburoh Yamada
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Publication number: 20010044069Abstract: A photothermographic material having an image-forming layer that contains at least a non-photosensitive silver salt of an organic acid, a photosensitive silver halide, a nucleating agent and a binder on a support, and a protective layer at a position remoter from ,the support compared with the image-forming layer, which shows a saturation swelling time of 60 seconds or longer in distilled water at 21° C. According to the present invention, there is provided a photothermographic material for photographic art, in particular, for scanners, image setters and so forth, which shows low humidity dependency during development for developed character line width and can secure high image density (Dmax) even in a low humidity environment.Type: ApplicationFiled: March 6, 2001Publication date: November 22, 2001Inventor: Tadashi Ito
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Publication number: 20010038977Abstract: A heat-developable image-recording material comprising, on a support, a silver-supplying layer containing an organic silver salt, a reducing agent and an organic binder, and a separate photosensitive layer containing a photosensitive silver halide, the heat-developable image-recording material further containing an electron-transfer agent; and a method for forming an image by heat development comprising; imagewise exposing the heat-developable image-recording material and then heat-developing, whereby development of the photosensitive layer forms a silver image in the silver-supplying layer.Type: ApplicationFiled: January 24, 2001Publication date: November 8, 2001Inventor: Kazunobu Katoh
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Publication number: 20010038966Abstract: High contrast color images can be obtained from aerial color photography by rapidly processing certain color photographic silver halide films with a color developing composition under certain conditions. The color developing composition can have a pH of from about 10.2 to about 10.6 and a color developing agent at a concentration of least 0.015 mol/l. Color development is carried out for less than 180 seconds at from about 40 to about 42° C. The resulting color images have a contrast greater than 0.83, low Dmin, low granularity and high sharpness and resolution.Type: ApplicationFiled: December 14, 2000Publication date: November 8, 2001Inventors: Thomas P. Larkin, Steven A. Mango, Charles F. Leith, Daniel T. Kennelly
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Patent number: 6309814Abstract: A heat developable photosensitive material having on a support a non-photosensitive sliver salt, a photosensitive sliver halide, and a binder, which has an image forming layer containing the photosensitive sliver halide and comprises cyclic ketone or cyclic imine compound having a specific structure in combination with a nucleation agent on the side that the image forming layer is formed. This heat developable photosensitive material is an excellent high contrast sensitive material having a good stability.Type: GrantFiled: February 1, 2000Date of Patent: October 30, 2001Assignee: Fuji Photo Film Co., Ltd.Inventor: Tadashi Ito
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Patent number: 6306574Abstract: In a photothermographic material comprising an organic silver salt, a silver halide, and a reducing agent, a specific hydrazine derivative is contained as a nucleating agent. The material has high sensitivity, high Dmax and good image quality.Type: GrantFiled: May 16, 1997Date of Patent: October 23, 2001Assignee: Fuji Photo Film Co., Ltd.Inventors: Kohzaburoh Yamada, Toshiaki Kubo, Shigeo Hirano
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Patent number: 6297000Abstract: A thermographic recording element having at least one image forming layer contains an organic silver salt, a reducing agent, and an adsorption promoting group-bearing alkene compound. The element has high Dmax, high sensitivity, satisfactory contrast and shelf stability.Type: GrantFiled: April 28, 2000Date of Patent: October 2, 2001Assignee: Fuji Photo Film Co., Ltd.Inventors: Hiroyuki Suzuki, Toshihide Ezoe, Kohzaburoh Yamada
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Publication number: 20010021480Abstract: A photothermographic image recording element has on a support a photosensitive layer containing a non-photosensitive organic silver salt, a photosensitive silver halide, and a binder, wherein the organic silver salt has been formed in the presence of a tertiary alcohol. The photosensitive layer and/or a layer disposed adjacent thereto contains a nucleating agent. Alternatively, the photosensitive layer contains the silver halide which has been formed independent from the organic silver salt and added during preparation of a coating solution, and the main binder is a polymer latex having a Tg of −30° C. to 40° C. The element shows low fog, high contrast, and high sensitivity.Type: ApplicationFiled: February 9, 1999Publication date: September 13, 2001Applicant: Kazuki YamazakiInventor: KAZUKI YAMAZAKI
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Publication number: 20010018169Abstract: A processing method which thermally develops a thermally developable photosensitive material which is exposed imagewise, comprising the step of thermally developing said thermally developable photosensitive material using heating element which intermittently heats and has duration time of surface temperature of not less than 250° C. to be not more than 1 second, wherein said thermally developable photosensitive material comprising a support having thereon one layer or plural layers; containing organic silver salt, photosensitive silver halide grains and a reducing agent.Type: ApplicationFiled: January 26, 1999Publication date: August 30, 2001Inventor: TAKESHI SAMPEI
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Color-developing agent, silver halide photographic light-sensitive material and image-forming method
Patent number: 6277994Abstract: There is disclosed a novel color-developing agent of a 1,2,4-thiadiazol-5-yl hydrazine type. There is also disclosed a silver halide photographic light-sensitive material which gives sufficient color formation by development and forms an image excellent in image quality and image storability, by using the color-developing agent. Further, there is disclosed an image-forming method using the light-sensitive material.Type: GrantFiled: March 31, 2000Date of Patent: August 21, 2001Assignee: Fuji Photo Film Co., Ltd.Inventors: Osamu Uchida, Yasuhiro Ishiwata, Kiyoshi Takeuchi, Taiji Katsumata, Takashi Nakamura -
Patent number: 6277553Abstract: A thermographic recording element having at least one image forming layer contains an organic silver salt, a reducing agent, and a nucleating agent. The element has high Dmax, high sensitivity, satisfactory contrast and minimized black pepper.Type: GrantFiled: October 16, 1998Date of Patent: August 21, 2001Assignee: Fuji Photo Film Co., Ltd.Inventors: Masahiko Taniguchi, Kohzaburoh Yamada, Toshihide Ezoe
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Patent number: 6277554Abstract: In a thermographic recording element comprising an organic silver salt, a photosensitive silver halide, and a reducing agent, there are further included a specific compound and a hydrazine derivative. The element exhibits a high contrast and the minimized dependency of photographic properties on developing temperature.Type: GrantFiled: May 11, 1999Date of Patent: August 21, 2001Assignee: Fuji Photo Film, Co., Ltd.Inventors: Kohzaburoh Yamada, Hiroyuki Suzuki, Toshihide Ezoe
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Publication number: 20010014435Abstract: A photothermographic image forming element contains a non-photosensitive silver salt which has been formed by simultaneously adding and mixing previously prepared solutions of silver nitrate and an organic acid alkali metal salt. A photosensitive layer containing a photosensitive silver halide or a layer disposed adjacent thereto or both contain a nucleating agent. The element produces a low fog, high contrast image.Type: ApplicationFiled: March 23, 1999Publication date: August 16, 2001Applicant: Kazuki YamazakiInventor: KAZUKI YAMAZAKI
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Patent number: 6261754Abstract: A heat developable image recording material is disclosed in which having at least one image forming layer formed on a support, and a multilayered protection layer consisting of a lower protection layer formed adjacent to and on the image forming layer and at least one upper protection layer formed on the lower protection layer, wherein the lower protection layer comprises a polymer as a binder, in which I/O value of the polymer that is obtained by dividing inorganic value by organic value based on an organic conception diagram is equal to or less than 0.60, and wherein a ratio of the I/O value of the polymer contained as the binder of the lower protection layer to the I/O value of a polymer contained as a binder of the upper protection layer is less than 1.0.Type: GrantFiled: January 13, 2000Date of Patent: July 17, 2001Assignee: Fuji Photo Film Co., Ltd.Inventors: Kunio Ishigaki, Takahiro Ishizuka
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Patent number: 6245499Abstract: In a photothermographic material comprising an organic silver salt, a silver halide, and a reducing agent, a hydrazine compound of a special structure and a sensitizing dye of a special structure are contained. The photothermographic material shows high Dmax and ultrahigh contrast.Type: GrantFiled: August 21, 1998Date of Patent: June 12, 2001Assignee: Fuji Photo Film Co., Ltd.Inventors: Keiichi Suzuki, Toshiaki Kubo, Yoshio Inagaki, Tsutomu Arai
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Patent number: 6245480Abstract: The invention relates to an ultrahigh contrast photographic material comprising a support bearing a silver halide emulsion layer, containing a hydrazide nucleating agent in the emulsion layer or a hydrophilic colloid layer, characterised in that the nucleating agent of formula (I) comprises (a) two nicotinamide moieties, which may be the same or different, which are linked by a linking group, and (b) a hydrazide moiety linked to only one of the nicotinamide moieties. The nucleator of formula (I) may be in combination with a nucleator of formula (II) which comprises a dimeric molecule comprising two monomers linked by a linking group, each monomer of which (a) may be the same or different and (b) comprises a hydrazide moiety and a nicotinamide moiety. The photographic material provides unexpectedly good nucleation in the absence of, or with reduced amounts of, booster and in a developer whose pH is variable, and further with lower chemical spread and pepper fog.Type: GrantFiled: June 12, 2000Date of Patent: June 12, 2001Assignee: Eastman Kodak CompanyInventors: Judith A. Bogie, Philip J. Coldrick, John D. Goddard, Llewellyn J. Leyshon
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Patent number: 6218070Abstract: A process to make ultrahigh contrast photographic negative images is disclosed. In known processes, particularly those using hydrazine compounds, developer solutions to increase contrast contain high concentrations of amino compounds that are volatile, have an annoying, unwholesome odor, and corrode the development machines. If development is conducted in the presence of onium compounds having both quaternary nitrogen and tertiary amine functions in the molecule, the process can operate with odor-free developers that do not release corrosive vapors. The invention can be used in reprography for steps preliminary to printing.Type: GrantFiled: March 10, 1994Date of Patent: April 17, 2001Assignee: Agfa-Gevaert, N.V.Inventor: Reinhold Rüger
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Patent number: 6210869Abstract: An image forming method using heat-developable photosensitive material includes, for forming images, the steps of exposing images imagewisely in overlapping light beam to a heat-developable photosensitive material including on a support a non-photosensitive silver salt, a photosensitive silver halide, and a binder and of developing the images with heats, wherein an overlap coefficient which is ratio of a full width at half maximum (FWHM) of a beam intensity in a beam spot used for imagewise exposure to a subscanning pitch width is 0.2 or higher and 0.5 or lower, wherein an exposing time is of a high illumination rapid exposure less than 10−7 second, and wherein the &ggr; of the heat-developable photosensitive material after the step of developing the images with heat (wherein the &ggr; is the gradient of a straight line connecting the density points of 0.2 and 2.5 where the logarithm of the exposing amount is abscissa) is set as 5≦&ggr;≦15.Type: GrantFiled: September 30, 1999Date of Patent: April 3, 2001Assignee: Fuji Photo Film Co., Ltd.Inventor: Tadashi Ito
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Patent number: 6203972Abstract: A photothermographic material has a support bearing a photosensitive layer containing an organic silver salt, a photosensitive silver halide, a reducing agent, and a ultrahigh contrast promoting agent. The support is a plastic film having a Tg of at least 90° C. Better results are obtained when the support experiences a dimensional change of up to 0.04% when heated at 115° C. for 30 seconds. Preferably, a conductive polymer layer is provided typically as an outermost layer, and an outermost layer has a Bekk smoothness of up to 4,000 seconds, typically a back layer has a Bekk smoothness of up to 4,000 seconds. The photothermographic material has improved dimensional stability and produces ultrahigh contrast images with high Dmax.Type: GrantFiled: April 24, 1997Date of Patent: March 20, 2001Assignee: Fuji Photo Film Co., Ltd.Inventors: Kazunobu Katoh, Minoru Sakai, Tsutomu Arai, Kiyokazu Hashimoto
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Patent number: 6171752Abstract: A photographic material comprises a support bearing at least one silver halide emulsion layer. The material contains in the emulsion layer or an adjacent hydrophilic colloid layer, a nucleating agent. One or more of the layers further comprises a polymeric material capable of partitioning the nucleating agent in order to control nucleation and thereby allow the level of pepper fog and raw stock keeping to be controlled.Type: GrantFiled: December 9, 1998Date of Patent: January 9, 2001Assignee: Eastman Kodak CompanyInventors: Julie Baker, John M. Higgins
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Patent number: 6171753Abstract: There is disclosed a silver halide photographic light-sensitive material, which comprises a support having thereon at least one spectrally sensitized light-sensitive silver halide emulsion layer, wherein the silver halide emulsion layer contains at least two kinds of silver halide emulsions, which are different in the concentration of at least one nitrogen-containing heterocyclic compound capable of forming a complex with silver, and wherein the emulsion layer or another hydrophilic colloid layer contains at least one hydrazine derivative, as a nucleating agent, and at least one of amine derivatives, onium salts, disulfide derivatives, or hydroxymethyl derivatives, as a nucleating accelerator. The light-sensitive material is high in sensitivity, extremely high in contrast, and high in blackening density; it makes both saving of a sensitizing dye and low dye stain possible; and the change in sensitivity is small in the production thereof.Type: GrantFiled: March 29, 1999Date of Patent: January 9, 2001Assignee: Fuji Photo Film Co., Ltd.Inventor: Tokuju Oikawa
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Patent number: 6150083Abstract: It was found that good sensitizing activity in the red spectral region and without residual stain can be obtained with dyes of the general formula (I) ##STR1## wherein R.sub.1 is an alkyl group having 1 to 6 carbon atoms or a heterocyclic ring, R.sub.2 and R.sub.3 are hydrogen, methyl, or methoxy, but at least one of the groups R.sub.2 and R.sub.3 is not hydrogen, R.sub.4 and R.sub.5 are alkyl groups having 1 to 6 carbon atoms that can be substituted with hydroxyl groups, and X.sup.- is an anion.The invention can be used for preparing silver images, for example, for reproduction in preprint operations for black and white or multicolor printing.Type: GrantFiled: November 5, 1997Date of Patent: November 21, 2000Assignee: Agfa-Gevaert, N.V.Inventors: Francois Varescon, Reinhold Ruger
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Patent number: 6150084Abstract: In a photothermographic element comprising a non-photosensitive silver salt, a photosensitive silver halide, and a binder on a support, a latex of a polymer having a Tg of -30.degree. C. to 40.degree. C. constitutes at least 50% by weight of the binder in an image forming layer containing the silver halide, and the image forming layer or a layer disposed adjacent thereto or both contain a nucleating agent and a diphosphorus pentoxide-derived compound. The element produces a low fog, high contrast image.Type: GrantFiled: March 17, 1999Date of Patent: November 21, 2000Assignee: Fuji Photo Film Co., Ltd.Inventors: Tadashi Ito, Makoto Ishihara
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Patent number: 6143462Abstract: The invention relates to an ultrahigh contrast photographic material comprising a support bearing a silver halide emulsion layer, containing a hydrazide nucleating agent in the emulsion layer or a hydrophilic colloid layer, characterised in that the nucleating agent is a dimeric molecule comprising two monomers linked by a linking group, each monomer of which (a) may be the same or different and (b) comprises an acylhydrazide moiety and a nicotinamide moiety in combination, the material providing unexpectedly good nucleation in the absence of, or with reduced amounts of, booster and in a developer whose pH is variable, and further with lower chemical spread and pepper fog.Type: GrantFiled: November 22, 1999Date of Patent: November 7, 2000Assignee: Eastman Kodak CompanyInventors: John D. Goddard, Philip J. Coldrick, Rebecca Glen, Dawn J. Jenkins
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Patent number: 6120983Abstract: A photothermographic material contains an organic silver salt, a photosensitive silver halide, a reducing agent, a binder, and a compound of the formula: X--L.sub.1 --D wherein D is an electron donative group of atoms, X is an adsorption promoting group to silver halide, and L.sub.1 is a valence bond or a linking group. It has high sensitivity in the red to infrared region and experiences a minimal change of photographic properties under different developing conditions.Type: GrantFiled: October 22, 1997Date of Patent: September 19, 2000Assignee: Fuji Photo Film Co., LtdInventors: Hisashi Okada, Ryo Suzuki, Naoki Asanuma, Tadashi Ikeda, Shigeo Hirano
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Patent number: 6117611Abstract: An image forming method of a silver halide photographic light-sensitive material is disclosed. The silver halide photographic light-sensitive material is exposed to a laser beam light, while said silver halide photographic light-sensitive material is conveyed with rollers at 15 to 100 mm/sec., and processed with a developer composition containing a developing agent represented by formula (A). The silver halide photographic light-sensitive material contains at least an organic contrast enhancing agent, the impedance of at least one side of said silver halide photographic light-sensitive material is from 4.times.10.sup.5 to 10.sup.20 .OMEGA.Type: GrantFiled: December 13, 1999Date of Patent: September 12, 2000Assignee: Konica CorporationInventor: Hirohide Ito