Abstract: There is disclosed an oxidation-reduction imaging forming composition comprising an aqueous based dispersion of (i) nanoparticulate silver carboxylate particles having on the surface of the particles a surface modifier which is a phosphoric acid ester and (ii) an organic reducing agent. In particular, the surface modifiers can be mixtures of mono- and di-esters of orthophosphoric acid and hydroxyl-terminated, oxyethylated long-chain alcohols or oxyethylated alkyl phenols or derivatives thereof. Also disclosed are various compositions including the dispersions including oxidation-reduction imaging forming compositions, thermographic elements and photothermographic compositions and elements. The preferred carboxylate is a silver salt of a long chain fatty acid such as silver behenate.

Abstract: An emulsion comprising a substantially light-insensitive organic silver salt, photosensitive silver halide in catalytic association with the substantially light-insensitive organic silver salt and a binder, wherein the emulsion further comprises a polyhalide compound selected from the group consisting of quaternary ammonium polyhalides, quaternary phosphonium polyhalides and ternary sulphonium polyhalides, which satisfies a test specified in the description, or a product of a reaction between the polyhalide compound and a reducing species present in said emulsion; a process for producing a photothermographic recording material, capable of image formation without preliminary heating prior to exposure, comprising a photo-addressable thermally developable element incorporating the emulsion; and a photothermographic recording process utilizing the photothermographic recording material.

Abstract: A production method for a photothermographic recording material comprising the steps of: (i) providing a support; (ii) coating the support with a photo-addressable thermally developable element comprising a substantially light-insensitive organic silver salt, photosensitive silver halide in catalytic association with the substantially light-insensitive organic silver salt, a reducing agent in thermal working relationship with the substantially light-insensitive organic silver salt and a binder, characterized in that the photosensitive silver halide is formed by reacting an aqueous emulsion of particles of the substantially light-insensitive organic silver salt with at least one onium salt with halide or polyhalide anion(s) and that the photo-addressable thermally developable element is coated from an aqueous dispersion medium; and a recording process therefor.

Abstract: A photosensitive material includes silver iodide produced by decomposing a solid electrolyte of the formula MA4g5 having an ionic conductivity of >0.001 ohm−1 cm−1 in an organic solvent, where M is a monovalent cation. The photosensitive material further includes a sensitizing agent selected from the group consisting of residual MAg4I5, MAg4I3, and mixtures of residual MAg4I5, and MAg4I3.

Abstract: A photothermographic element has on a support a photo-sensitive layer, and a first non-photosensitive layer containing (1) a base-bleachable dye or a salt thereof and (2) a binder. The first non-photosensitive layer or a second non-photosensitive layer disposed adjacent thereto contains (3) a base precursor and (4) a melting point depressant. The dye (1) becomes more bleachable and the processed image becomes more water resistant.

Abstract: A photothermographic material is disclosed, comprising a non-photosensitive organic silver salt, a photosensitive silver halide, a reducing agent a binder and a cross-linking agent; the photothermographic material further comprising a compound capable of generating a labile species other than a halogen atom upon exposure to ultraviolet radiation or visible radiation to deactivate the reducing agent.

Abstract: Provided is a photothermographic material containing on one side of a support a photosensitive silver halide, a non-photosensitive organic silver salt, a reducing agent for silver ion and a binder, characterized in that an image obtainable after the light exposure and development satisfies a condition expressed as below: 0≦&Dgr;BG0.5−&Dgr;BG2.5<0.15 (where, &Dgr;BG0.5 represents a value obtained by subtracting 0.5 from an optical density observed through a B filter of an image portion giving an optical density of 0.5 observed through a G filter, and &Dgr;BG2.5 represents a value obtained by subtracting 2.5 from an optical density observed through a B filter of an image portion giving an optical density of 2.5 observed through a G filter.) The photothermographic material is suitable enough for medical diagnosis, and in particular for diagnosis of lung field.

Abstract: 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.

Abstract: A photothermographic material is disclosed, comprising on a support an organic silver salt, a light-sensitive silver halide, a reducing agent, and a compound represented by the following formula, 6-aryl-2,4-bis(tribromomethyl)-s-triazine or a 6-heteroaryl-2,4-bis(tribromomethyl)-s-triazine.

Abstract: 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.

Abstract: Thermally processable imaging elements in which the image is formed by imagewise heating or by imagewise exposure to light followed by uniform heating are comprised of a support, a thermographic or photothermographic imaging layer, a protective overcoat layer which is an outermost layer on the same side of the support as the imaging layer, a backing layer which is an outermost layer on the side of the support opposite to the imaging layer, and an electroconductive agent in at least one layer of the element. Each of the protective overcoat layer and the backing layer contains a fluorosurfactant in an amount sufficient to serve as a triboelectric charge control agent and effective in providing essentially the same triboelectric charging characteristics to the backing layer as to the protective overcoat layer.

Abstract: A thermally developable photosensitive material comprising photosensitive silver halide grains, an organic silver salt, a reducing agent and a binder, characterized in that a dispersibility ((standard deviation of circle equivalent diameter of cell)/(average value); cell centering each grain is obtained by processing an electron microscope image employing an extension method) of said photosensitive silver halide grains having grain size of not less than 0.02 &mgr;m, measured from an expopsing side of said thermally developable photosensitive material, is not more than 80%.

Abstract: A black and white monosheet thermographic recording material having a spectrophotometrically determined maximum absorption for visible light between 570 and 650 nm and comprising a support and a thermosensitive element, said thermosensitive element containing a substantially light-insensitive organic silver salt, an organic reducing agent therefor in thermal working relationship therewith and a binder, wherein the substantially light-insensitive black and white monosheet thermographic recording material contains at least two colorants with maximum absorption at a wavelength between 450 nm and 700 nm, none of the at least two colorants is an antihalation dye, and at least one of the at least two colorants is incorporated in the support; and photothermographic and thermographic recording processes therewith.

Abstract: A method for producing grains of aliphatic acid silver salt by mixing a solution containing silver ions and a solution of aliphatic acid alkali metal salt to attain reaction of them, wherein (1) 95-100% of the total molar number to be added of the aliphatic acid alkali metal salt is added under a condition that dilution factor of the solution of aliphatic acid alkali metal salt becomes 10-fold or higher at 1 second after the addition, (2) 95-100% of the total amount to be added of silver in the solution containing silver ions is added under a condition that dilution factor of the solution containing silver ions becomes 20-fold or higher at 1 second after the addition, and (3) 50-100% of the total amount to be added of the solution of aliphatic acid alkali metal salt is added simultaneously with the solution containing silver ions.

Abstract: 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.

Abstract: A photothermographic recording material comprising a support and a photo-addressable thermally developable element comprising photosensitive silver halide in catalytic association with a substantially light-insensitive silver salt of an organic carboxylic acid, an organic reducing agent for the substantially light-insensitive silver salt of an organic carboxylic acid in thermal working relationship therewith and a binder, characterized in that the binder is water soluble or water dispersible and the reducing agent is a non-sulfo-substituted 6-membered aromatic or heteroaromatic ring compound with at least three substituents one of which is a hydroxy group at a first carbon atom and a second of which is a hydroxy or amino-group substituted on a second carbon atom one, three or five ring atoms removed in a system of conjugated double bonds from the first carbon atom in the compound, in which (i) the third substituent may be part of an annelated carbocyclic or heterocyclic ring system; (ii) the third substituent

Abstract: 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.

Abstract: 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.

Abstract: A photosensitive element comprising a silver halide emulsion having silver halide grains containing an organic hole-trapping dopant. In a preferred embodiment said dopant is represented by formula (I): R—COOM  (I) wherein R is hydrogen, a substituted or unsubstituted alkyl group, a substituted or unsubstituted aryl group, a substituted or unsubstituted aralkyl group or hetero-aryl group, and M is hydrogen or any metal or organic group which can form a salt or by formula (II): wherein: X and Y are independently selected from O, S, Se, m is 1 and n is 1 or 2, R1 and R2 are hydrogen, a substituted or unsubstituted alkyl group, a substituted or unsubstituted aryl or aralkyl group or a substituted or unsubstituted heteroaryl group, wherein R1 and R2 may be the same or different and may form a ring, E represents a group linked to the carbon atom by a heteroatom, having at least one free electron pair, M+ is a proton or an organic or inorganic (metal) counterion.

Abstract: 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.

Abstract: A photothermographic recording element having improved image tone and improved tone stability during storage is provided wherein at least one of constituent layers comprises (a) polymeric microparticulates containing a dyestuff, (b) microcapsules containing a dyestuff, and/or (c) an organic or inorganic pigment.

Abstract: A production process for a photothermographic recording material thermally developable under substantially water-free conditions comprising the steps of: (i) providing a support; (ii) producing one or more aqueous dispersions or solutions containing together a substantially light-insensitive organic silver salt, photosensitive ex-situ silver halide in catalytic association with the substantially light-insensitive organic silver salt, a reducing agent in thermal working relationship with the substantially light-insensitive organic silver salt and a binder; (iii) coating the one or more aqueous dispersions or solutions onto the support to form layers which upon drying become a photo-addressable thermally developable element; and (iv) drying the layers, wherein the photo-addressable thermally developable element contains between 0.2 and 2.

Abstract: A photothermographic element comprising on a support (a) a photosensitive silver halide, (b) a reducible silver salt, (c) a reducing agent, (d) an ultrahigh contrast-providing agent, (e) a binder, (f) a specific salicylic acid type antifoggant, and optionally (g) phosphoric acid or a salt thereof has a low fog, high sensitivity, high contrast, and storage stability.

Abstract: A thermographic recording material, thermally developable under substantially water-free conditions, comprising a support and a thermosensitive element, the thermosensitive element being provided with a protective layer and the thermosensitive element containing a substantially light-insensitive silver salt of an organic carboxylic acid, a reducing agent therefor in thermal working relationship therewith and a binder, wherein the protective layer contains at least one proteinaceous binder and non-opacifying inorganic particles with a weight averaged diameter of less than 1&mgr;m in a concentration of between 5 and 70% by weight with respect to the weight of the protective layer.

Abstract: Disclosed is a thermally developable photosensitive material having a photosensitive layer comprising a photosensitive silver halide, an organic silver salt, a reducing agent, and a binder, a thermally developable photosensitive material the organic silver salt comprises tabular organic silver salt grains having an aspect ratio of at least 3, and average of needle ratio of the tabular organic silver salt grains measured from principal plane direction is not less than 1.1 and less than 10. The thermally developable photosensitive material exhibits high sensitivity as well as low fog and an image forming method employing the same.

Abstract: A thermally developable photosensitive material of enhanced sensitivity, reduced variation in sensitivity following pre-exposure storage and improved silver image tone is disclosed, comprising a support having thereon an organic silver salt, a binder, a photosensitive silver halide, an infrared-sensitizing dye and a heteroatom containing macrocyclic compound.

Abstract: 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.

Abstract: A thermally developable material comprising a support, an image forming layer containing an organic silver salt, and a component layer provided on the same side as said image forming layer provided, wherein the stiffness (ST) of said thermally developable material under conditions of 23° C. and 50% RH is 30 g≦ST≦80 g.

Abstract: An image forming method for a thermally processable photosensitive material is disclosed, comprising exposing a thermally processable photosensitive material to light using a laser light source, and subjecting the exposed photosensitive material to thermal processing, wherein the thermally processable photosensitive material comprises a support having thereon an organic silver salt, a binder, a photosensitive silver halide, and a compound containing nitrogen covalently bonded to halogen represented by the following formula or a nitrogen-containing acyclic compound associated with a pair of halogen atoms represented by the following formula

Abstract: 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.

Abstract: 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.

Abstract: A thermally developable photosensitive material is disclosed, comprising a support having thereon an image forming layer containing an organic silver salt and optionally provided on the side of the image forming layer, a component layer, at least one of the image forming layer and the component containing photosensitive silver halide grains and the photosensitive material exhibiting a silver potential of not more than 200 mV.

Abstract: A thermographic recording element having an image forming layer contains an organic silver salt, a reducing agent, an optional photosensitive silver halide, and a specific nucleating agent. The element has high Dmax, high sensitivity, satisfactory contrast, low fog, and minimal dependency of photographic properties on developing temperature.

Abstract: A photothermographic material has on one surface of a support at least one photosensitive layer containing a photosensitive silver halide, an organic silver salt, and a reducing agent. A non-photosensitive layer or back layer is formed on the back surface of the support by applying a coating solution of a binder containing at least 50% by weight of a polymer latex dispersed in a solvent containing at least 30% by weight of water and drying the coating. The polymer latex is of a polymer having an equilibrium moisture content of less than 2% by weight at 25° C. and RH 60%. The back layer can be coated at a low cost without a need for a harmful organic solvent. Upon storage in a humid atmosphere, sheets of the material are minimized in fog and free of sticking.

Abstract: This invention comprises thermally processable imaging element comprising: (a) a support, (b) a thermally processable imaging layer on one side of the support; and (c) a protective layer comprising a binder and matte particles comprising a crosslinked polymer, wherein the protective layer has been applied as a solution of binder and matte particles in a coating solvent in which the binder is soluble and the matte particles are swellable to the extent of about 160 to about 390%.

Abstract: 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.

Abstract: A thermally developable material is disclosed. The material comprises a support both surfaces which are covered with a resin thermal shrinkage ratio of not more than 0.02% at 150° C. for 30 minutes, and an image forming layer comprising an organic silver. The thermally developable material is advantageous in transparent without staining and size repetition accuracy.

Abstract: 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.

Abstract: A thermally developable material comprising a support, an image forming layer containing organic silver salts, and a component layer provided on the image forming layer side, wherein a smooster value on the surface of said image forming layer side of said thermally developable material is not more than 40 mm Hg, and said image forming layer or said component layer contains a fluorine containing surfactant.

Abstract: An emulsion comprising a substantially light-insensitive organic silver salt, photosensitive silver halide in catalytic association with the substantially light-insensitive organic silver salt and a binder, wherein the emulsion further comprises a polyhalide compound selected from the group consisting of quaternary ammonium polyhalides, quaternary phosphonium polyhalides and ternary sulphonium polyhalides, which satisfies a test specified in the description, or a product of a reaction between the polyhalide compound and a reducing species present in said emulsion; a process for producing a photothermographic recording material, capable of image formation without preliminary heating prior to exposure, comprising a photo-addressable thermally developable element incorporating the emulsion; and a photothermographic recording process utilizing the photothermographic recording material.

Abstract: A photothermographic recording material comprising a support and a photo-addressable thermally developable element comprising photosensitive silver halide in catalytic association with a substantially light-insensitive organic silver salt, an organic reducing agent for the substantially light-insensitive organic silver salt in thermal working relationship therewith and a water-soluble or water-dispersible binder, characterized in that the substantially light-insensitive organic silver salt is a silver salt of an organic carboxylic acid, the photo-addressable thermally developable element further comprises a non-ionic or anionic surfactant and the photo-addressable thermally developable element is coatable from an aqueous medium and is capable of producing stable images without a wet-processing step; a process for producing the photothermographic recording material and a photothermographic recording process therefor.

Abstract: A method for preparing an organic silver salt dispersion is disclosed, comprising allowing silver nitrate is added to an aqueous solution or suspension of an alkali salt of an organic acid to react to form an organic silver salt dispersion, wherein the aqueous solution or suspension of an alkali salt of an organic acid is cooled at a mean cooling rate of not less than 0.5° C./min. to a temperature of 0° C. to 55° C., and then silver nitrate is added thereto.

Abstract: A thermographic recording element having an image forming layer contains an organic silver salt, a reducing agent, an optional photosensitive silver halide, and a specific nucleating agent. The element has high Dmax, high sensitivity, satisfactory contrast, and minimal dependency of photographic properties on developing conditions.

Abstract: A photothermographic element comprises: (a) a support bearing on one surface thereof (b) a photosensitive emulsion layer (i) a binder; (ii) a light-insensitive organic silver salt, (iii) a reducing agent, and (iv) a photosensitive silver halide emulsion; (c) an antihalation dye incorporated in the emulsion layer, in a polymer layer under the photosensitive layer, in the support, or in a backside polymer layer; and (d) one or more tinting dyes such that the final color space of the film lies within the range defined by 220°<hab<260°, where hab is the psychometric hue angle, hab=arctan(b*/a*), as defined in the CIELAB color system.

Abstract: A heat-developable image-recording material comprising an organic silver salt, a reducing agent, and an organic binder, wherein the material further comprises a compound represented by the following formula (I) or (II): wherein R1 is a group selected from the group consisting of hydrogen atom, an alkyl group, an aryl group, hydroxyl group, amino group, thiol group, an alkoxyl group, and thioether group; and R2 and R3 may be the same or different and represent hydrogen atom or 1 to 4 functional groups.

Abstract: 1-Sulfonyl-1H-benzotriazole compounds have been found to be useful as antifoggants and print stabilizers in photothermographic elements. The photothermographic elements may be used in medical imaging films or as a photomask in a process where there is a subsequent exposure of an ultraviolet or short wavelength visible radiation-sensitive imageable medium.

Abstract: This invention comprises a photothermographic element comprising a support bearing an imaging layer comprising:a silver salt;a reducing agent;a binder; anda photosensitive material comprising silver iodide produced by dispersing a solid ionic conductor of the formula MAg.sub.4 I.sub.5 in an organic solvent, whereby the solid ionic conductor decomposes to produce silver iodide, and wherein M is a monovalent cation and said solid ionic conductor has an ionic conductivity of >0.001 ohm.sup.-1 cm.sup.-1 at 25.degree. C.

Abstract: A photothermographic element has on a support a photosensitive layer and a non-photosensitive layer containing (1) a base precursor, (2) a base-bleachable dye or a salt thereof, and (3) a binder. A constituent layer on the same side of the support as the non-photosensitive layer contains (4) a water-soluble polymer other than gelatin. The element is improved in coating surface quality and minimized in residual color.

Abstract: An image-forming material comprising a support and a constituent layer(s) comprising at least (a) a thermographic image-forming layer containing a reducible silver salt, a reducing agent of the reducible silver salt and a binder or (b) a photothermographic image-forming layer containing a light-sensitive silver halide as a photocatalyst, reducible silver salt, a reducing agent of the reducible silver salt and a binder, wherein the image-forming material comprises a compound represented by formula (I-1) or (II-1) in at least one constituent layer: ##STR1## wherein R represents a secondary alkyl group or a cycloalkyl group; and M.sup.1 and M.sup.2 each represents a hydrogen atom, a metal ion or an ammonium ion; ##STR2## wherein R.sup.1 represents a secondary alkyl group, a cycloalkyl group, an aryl group, or a primary alkyl group substituted with a substituent bonded via a hetero atom; and M.sup.1 and M.sup.2 each represents a hydrogen atom, a metal ion or an ammonium ion.

Abstract: A polyester support having an adjacent subbing layer which comprises a polymer or copolymer of glycidyl acrylate and/or glycidyl methacrylate improves the adhesion of a photothermographic imaging layer containing a poly(vinyl butyral) binder coated from an organic solvent. The subbing layer can be applied in the form of an aqueous dispersion in the prescence of a coalescing agent. Such a subbing layer does not adversely affect sensitometry in a photothermographic or thermographic element.