Abstract: 1. A thermographic imaging element comprising: (a) a support; and(b) an imaging layer comprising:(i) an oxidizing agent;(ii) a first reducing agent; and(iii) a second reducing agent comprising a boron compound containing at least one boron-hydrogen bond.

Abstract: A method of making a thermally processable imaging element which comprises:i) forming a solution of poly(vinyl alcohol) in water;ii) adding matte particles to the resulting aqueous medium;iii) adding a compound of the formula I or formula II to the aqueous medium in an amount sufficient to inhibit agglomeration of the matte particles: ##STR1## wherein: the substituents are as described in the specification; iv) coating an image recording layer onto one side of a support;v) coating the aqueous medium containing the matte particles as an overcoat layer over the image recording layer or as backing layer on the side of the support opposite the image recording layer.

Abstract: According to the present invention there is provided a photothermographic material comprising on a support a photo-addressable thermally developable element containing a substantially light-insensitive organic heavy-metal salt, photosensitive silver halide in catalytic association with said substantially light-insensitive organic heavy-metal salt, a reductor for said substantially light-insensitive organic heavy-metal salt and a binder, said photothermographic material having on the same side of the support as said photo-addressable thermally developable element an outermost layer having two phases at least one of which being a dispersion phase of thermoplastic particles, characterized in that said two phases exhibit different affinities for at least one printing liquid selected from the group consisting of ink and an abhesive fluid for ink.

Abstract: A thermally processable imaging element which comprises a support bearing an imaging layer containing in reactive association an image-forming combination comprising an organic silver salt oxidizing agent with a reducing agent for the organic silver salt oxidizing agent, wherein the imaging layer comprises a binder and a chlorinated hydrocarbon.

Abstract: An apparatus and a method for bringing a thermographic imaging element (11) to a desired temperature by means of thermal contact with a heating body (10, 30) which is at least filled with an accessory material in a first phase (15) and with said accessory material in a second phase (16) comprise pressure setting means (17, 18) for setting a desired pressure, energy means (19) for exchanging thermal energy with said heating body, detection means for detecting a phase or a phase transition of said accessory material, and relocation means for bringing said imaging element into contact with said heating body.

Abstract: A photothermographic material is disclosed, comprising a support having on at least one surface thereof a light-sensitive silver halide grain, an organic salt, a reducing agent for silver ion and a binder, wherein the heat-developable light-sensitive material contains a methine dye represented by formula (I).

Abstract: In a thermographic material comprising an organic acid silver, the organic acid silver having a half-width of up to 21.0' as measured by X-ray diffractometry is used. Then the thermographic material experiences a minimal change of photographic properties during shelf storage.

Abstract: A thermographic recording element comprising an organic acid silver salt, a reducing agent, a specific hydrazine derivative, and optionally, a photosensitive silver halide is improved in storage stability and forms images having high Dmax.

Abstract: A recording medium comprising a support having thereon a recording layer comprising an organic silver salt, a developing agent for the organic silver salt, a water-soluble binder and an antifoggant in an amount of from 10 mol % to 40 mol % based on the organic silver salt. The recording material has a long shelf life and provides a high-density image.

Abstract: A photothermographic material comprising (a) a reducible silver source, (b) a photocatalyst, (c) a reducing agent, (d) a binder, and (e) a compound represented by the following formula (I): wherein Q represents an atomic group necessary to form a six-membered heterocycle containing two to four nitrogen atoms; Y represents --CO--, --SO--, or --SO.sub.2 --; X.sub.1 and X.sub.2 each represent a halogen atom; and A represents a hydrogen atom or an electron withdrawing group, the photothermographic material exhibiting low fogging without deterioration in image tone and sensitivity decrease.

Abstract: The present invention relates to an infra-red laser sensitive thermographic material and to a process for forming a heat mode image using such a material.

Abstract: A photothermographic recording material comprising a support; 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 spectrally sensitized to the infrared region of the electromagnetic spectrum and a binder; and in a hydrophobic layer an antihalation dye according to the general formula (I): ##STR1## wherein R.sup.1 and R.sup.15 independently represent an alkyl group or an alkyl group substituted with at least one fluorine, chlorine, bromine or an alkoxy-, aryloxy- or ester-group; R.sup.2, R.sup.3, R.sup.16 and R.sup.17 independently represent an alkyl group; R.sup.4, R.sup.5, R.sup.6, R.sup.7, R.sup.18, R.sup.19, R.sup.20 and R.sup.

Abstract: A photothermographic material having a photosensitive medium comprising: photosensitive silver halide, a reducible silver source, a reducing agent for silver ion, a hydrobromic acid salt of a nitrogen-containing heterocyclic ring or fused ring nucleus associated with a pair of bromine atoms CHARACTERIZED IN THAT the photosensitive medium additionally comprises as an antifoggant, substantially in the absence of an antifoggant effective amount of mercury and other heavy metal salts, a tribromomethyl ketone compound of general formula (I): ##STR1## in which; R represents an alkyl group, an aryl group, a carbocyclic ring or fused ring nucleus or a heterocyclic ring or fused ring nucleus.

Abstract: A thermographic imaging element comprises:(a) a support;(b) an imaging layer comprising:(i) an oxidizing agent;(ii) a first reducing agent which has high activity with an activation energy of less than 10 Joules/sq.cm.;(iii) a second reducing agent which has low activity with an activation energy of greater than or equal to 10 Joules/sq. cm.; and(iv) a third reducing agent comprising a boron compound containing at least one boron-hydrogen bond.

Abstract: A thermographic imaging element comprises:(a) a support;(b) an imaging layer comprising:(i) a silver salt;(ii) a first reducing agent which has high activity with an activation energy of less than 10 Joules/sq.cm.;(iii) a second reducing agent which has low activity with an activation energy of greater than or equal to 10 Joules/sq. cm.; and(iv) a third reducing agent comprising a silicon compound containing at least one silicon-hydrogen bond.

Abstract: A spectrally sensitized photothermographic silver halide element comprising a support layer having on at least one surface thereof a photothermographic composition, said composition comprising a polyvinyl acetal binder, a light insensitive silver source, a reducing agent for silver ion and infrared radiation sensitive silver halide grains, wherein said composition also comprises a polymeric component which is not a polyvinyl acetal, or a metal soap other than a silver soap of an organic acid (especially not the long chain fatty acid normally present in silver halide based photothermographic elements) which is dispersed in said composition in an amount of from 0.3 to 20% by weight of said polyvinyl acetal, which polymeric component has higher strength of adhesion to polyester film than does the polyvinyl acetal, and said polymeric may exist as a separate phase within said polyvinyl acetal.

Abstract: A thermographic imaging element comprising:(a) a support; and(b) an imaging layer comprising:(i) an oxidizing agent;(ii) a first reducing agent; and(iii) a second reducing agent comprising a silicon compound containing at least one silicon-hydrogen bond.

Abstract: The present invention discloses a heat developable silver halide color photographic light-sensitive material comprising a support having thereon photographic constituent layers which comprise at least one photographic light-sensitive layer comprising a light-sensitive silver halide emulsion, a developing agent, a compound capable of forming a dye by a coupling reaction with the oxidation product of the developing agent, and a binder, wherein at least one photographic constituent layer contains at least one of the compounds expressed by the formula (I), (II), (III), or (IV) below, and wherein at least 50% of the total projected area of silver halide grains contained in the light-sensitive silver halide emulsion is taken up by tabular silver halide grains at least 50% of which are composed of silver chloride.

Abstract: A process for producing a suspension of particles containing a substantially light-insensitive organic silver salt of an organic carboxylic acid, comprising simultaneous metered addition of an aqueous solution or suspension of an organic carboxylic acid or its salt; and an aqueous solution of a silver salt to an aqueous liquid, wherein the metered addition of the aqueous solution or suspension of the organic carboxylic acid or its salt; and/or the aqueous solution of the silver salt is regulated by the concentration of silver ions or the concentration of anions of the silver salt in the aqueous liquid; for use in the production of (photo)thermographic materials.

Abstract: Thermally processable imaging elements in which the image is formed by imagewise heating or by imagewise exposure to light followed by uniform heating has a protective overcoat layer containing poly(silicic acid), and a mixture of a water-soluble hydroxyl-containing polymer and a polyvinyl acetal.

Abstract: A recording material for producing high contrast images comprising at least one thermosensitive element, comprising a layer comprising a substantially light-insensitive organic silver salt in at least one binder and in thermal working relationship therewith an organic reducing agent therefor, on a support, characterized in that the recording material is light-insensitive and the layer contains colloidal particles comprising silicon dioxide at a coating weight given by expression (1): ##EQU1## wherein B represents the total weight of all binders in the layer, AGOS represents the total weight of organic silver salt in the layer and S represents the weight of the colloidal particles in the layer; and wherein a protective layer is optionally applied to the thermosensitive element being thereby an outermost layer of the recording material.

Abstract: This invention provides a thermally processable imaging element comprising a support and a thermographic or photothermographic imaging layer, said imaging layer comprising a sulfenimide compound represented by the formula: ##STR1## wherein M represents the atoms necessary to form, with R.sup.1 and R.sup.2, a five or six-membered ring or a multiple ring system; w is 1 or 0, wherein when w is 0, R.sup.1 and R.sup.2 are independently substituted or unsubstituted aliphatic, aromatic or heterocyclic groups, and when w is 1, R.sup.1 and R.sup.2 are independently carbonyl or sulfonyl groups; R.sup.3 is independently a substituted or unsubstituted aliphatic, aromatic or heterocyclic group and x is 0 or 1.In one embodiment the thermally processable imaging element comprises:(a) photographic silver halide, and(b) an image-forming combination comprising(i) an organic silver salt oxidizing agent, with(ii) a reducing agent for the organic silver salt oxidizing agent.

Abstract: A light-sensitive material comprises a light-sensitive hardening layer provided on a support. The light-sensitive hardening layer contains silver halide, a reducing agent and an ethylenically unsaturated polymerizable compound or an ethylenically unsaturated cross-linkable polymer. The light-sensitive hardening layer further contains a coupling agent in an amount of 0.01 to 15 wt. %.

Abstract: An aqueous-developable chromogenic photographic heat-transferable non-aqueous dye-diffusion-transfer photographic element is disclosed, wherein said element comprises radiation sensitive silver halide, a dye-providing compound that forms or releases a heat-transferable image dye upon reaction of said compound with the oxidation product of a primary amine developing agent, a hydrophilic binder, and a thermal solvent for facilitating non-aqueous diffusion transfer according to formula (I) ##STR1## wherein AH is a hydrogen bond donating group with an aqueous pK.sub.a value for proton loss of greater than 6;L.sup.1 and L.sup.

Abstract: A thermographic element comprises a support having coated on at least one surface thereof a thermographic imaging system that contains a substantially light insensitive metal salt; a gallic acid reducing agent; and an infrared absorbing compound.These elements provide images that have high density in the ultraviolet spectral region when exposed to infrared radiation.

Abstract: A thermally processable imaging element comprises a support bearing an imaging layer comprising a hydrophobic binder and a boron compound of the formula: ##STR1## wherein R.sub.1, R.sub.2 and R.sub.3 are the same or different and are selected from substituted or unsubstituted alkyl groups, and substituted or unsubstituted aryl groups.

Abstract: A heat processable film comprising:a base layer;a dichroic mirror layer; anda heat processable emulsion layer which is exposed by radiation having a predetermined range of wavelengths; wherein the dichroic mirror layer reflects radiation at least having the predetermined range of wavelengths to the emulsion layer and transmits radiation having wavelengths outside the predetermined range of wavelengths.

Abstract: A thermally processable imaging element is comprised of:(1) a support;(2) a thermographic or photothermographic imaging layer on one side of the support;(3) a transparent protective layer comprising:(A) a film forming binder;(B) a dye in said protective layer in an amount sufficient to impart a pre-selected color thereto; and(C) matte particles, the color of which substantially matches the color of the protective layer.

Abstract: A thermosensitive recording material suited for use in direct thermal imaging by means of an information-wise energized heating element, said recording material containing a thermosensitive recording layer of which the optical density is changed by heat, characterized in that said recording layer is coated with a protective transparent resin layer essentially consisting of a polycarbonate or copolycarbonate derived from one or more bisphenols, wherein at least 25 mole % of said bisphenols consists of a bis-(hydroxyphenyl)-cycloalkane corresponding to following general formula (I): ##STR1## wherein: each of R.sup.1, R.sup.2 , R.sup.3, and R.sup.4 (same or different) represents hydrogen, halogen, a C.sub.1 -C.sub.8 alkyl group, a substituted C.sub.1 -C.sub.8 alkyl group, a C.sub.5 -C.sub.6 cycloalkyl group, a substituted C.sub.5 -C.sub.6 cycloalkyl group, a C.sub.6 -C.sub.10 aryl group, a substituted C.sub.6 -C.sub.10 aryl group, a C.sub.7 -C.sub.12 aralkyl group, or a substituted C.sub.7 -C.sub.

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 and a backing layer and include in at least one layer thereof, polymeric matte particles comprising a polymeric core surrounded by a layer of colloidal inorganic particles. The polymeric matte particles provide enhanced image quality and improved processing characteristics with respect to adhesion, dusting and lack of haze.

Abstract: An image formation method comprising imagewise exposing a silver halide light-sensitive material comprising a support having thereon a light-sensitive silver halide, a binder, a slightly water soluble basic metal compound, and a dye composition which is decolorized or discolored on heat development; contacting the surface of the light-sensitive material with a sheet coated with a binder and a compound which forms a complex with a metal ion constituting the basic metal compound and heating them in the presence of a reducing agent and water after or during the imagewise exposing; and peeling off the sheet to obtain an image on at least the light-sensitive material and the sheet, wherein the dye composition comprises an oil-soluble dye formed by a leuco dye and a color developer.

Abstract: An aqueous solid particle dispersion of a thermal solvent, where said thermal solvent is a water-immiscible phenol derivative and has a melting point, T.sub.m, between 30.degree. C. and about 200.degree. C., wherein said dispersion contains a dispersing aid, and wherein the thermal solvent particles in said dispersion are essentially nanocrystalline is disclosed. Also disclosed is a process for forming a coating comprising the steps of:providing an aqueous solid particle dispersion of thermal solvent, where said thermal solvent is a water-immiscible phenol derivative and has a melting point, T.sub.m, between 30.degree. C. and about 200.degree. C., and where said dispersion contains a dispersing aid;combining said aqueous solid particle thermal solvent dispersion with a coating melt composition, where said coating melt composition is maintained at a temperature, T.sub.c, during the preparation and coating of said coating melt composition, and where T.sub.c <T.sub.

Abstract: A method is disclosed for the the formation of a photo mode image based on a the introduction on exposure of a difference of tackiness in a photosensitive layer which contains a reducible silver salt such as silver behenate. After exposure the still tacky parts selectively take up a reactive toner containing a reducing agent. By means of a heat post-treatment density is built up by reduction of the organic silver salt. This density can be increased by the presence in the toner of a pigment, preferable carbon black. In this way high maximal densities can be obtained. In a preferred embodiment the difference in tackiness is introduced by image-wise photopolymerization of a monomer also present in the photosensitive layer.

Abstract: This invention provides a thermally processable imaging element comprising a support and a thermographic or photothermographic imaging layer, said imaging layer comprising an aryliodonium compound represented by the formula: ##STR1## wherein R.sup.1 and R.sup.2 and R.sup.3 are independently H, or aliphatic, aromatic or heterocyclic groups, alkoxy groups, hydroxy groups, halogen atoms, aryloxy groups, alkylthio groups, arylthio groups, acyl groups, sulfonyl groups, acyloxy groups, carboxyl groups, cyano groups, nitro groups, sulfo groups, alkylsulfoxide or trifluoralkyl groups, or any two of R.sup.1, R.sup.2 and R.sup.3 together represent the atoms necessary to form a five or six-membered ring or a multiple ring system;R.sup.4 is a carboxylate salt or 0.sup.- ; w is 0 or 1; and X.sup.- is an anionic counter ion; with the proviso that when R.sup.3 is a carboxyl or sulfo group, w is 0 and R.sup.4 is 0.sup.-.

Abstract: Heat bleachable antihalation compositions are prepared using metallized or unmetallized formazan dyes, hexaarylbiimidzoles having alkoxy substituents and organic carboxylic acids. These compositions are rapidly bleached at relatively low temperatures and can be used in photothermographic elements.

Abstract: 4-Substituted isoxazole compounds are useful as co-developers in combination with hindered phenol developers to produce high contrast black-and-white photothermographic and thermographic elements.The photothermographic and thermographic elements may be used as a photomask in a process where there is a subsequent exposure of an ultraviolet or short wavelength visible radiation-sensitive imageable medium.

Abstract: A method for forming an image, which comprises a step of subjecting a light-sensitive material to exposure to laser light having a multi-longitudinal-mode, wherein the light-sensitive material comprises a support having provided thereon at least one layer containing light-sensitive silver halide grains having an average grain size of no greater than 0.2 .mu.m, and the light-sensitive silver halide grains have a coverage rate of no greater than 1 g/m.sup.2, based on silver.

Abstract: Certain propenenitrile compounds have been found to function as antifoggants and serve to improve the initial minimum density of black and white photo-thermographic and thermographic elements.

Abstract: The addition of 3-substituted-5-mercapto-1H-tetrazoles to silver halide photothermographic emulsions improves the post-processing stability of the emulsion.

Abstract: A silver halide photographic material which is useful for photography and diagnostic imaging and exhibits excellent storability to ordinary aging, excellent image storability, high sensitivity and low D.sub.min is disclosed. The heat-developable silver halide infrared ray-sensitive material comprises a support having on one side of the support an emulsion layer containing a binder, a nonsensitive silver salt, a reducing agent for silver ion and silver halide grains spectrally sensitized at a wavelength within the region of from 750 to 1,400 nm, wherein the nonsensitive silver salt comprises a mixture of silver salts of at least three kinds of acids, one of the acids is behenic acid, and the content of the behenic acid in the acids is from not less than 35 to less than 90 mol %.

Abstract: There are described heat-developable photosensitive image-recording elements which have an alkali-generating system incorporated therein. In the alkali-generating system, a slightly water-soluble metal compound is reacted with a salt of 2-hydroxy-pyridine-N-oxide, or its derivatives, in the presence of a fluid such as water, to form an insoluble precipitate and the alkali required for silver image development during processing. The image-recording materials are useful as image-forming materials in thermographic and photothermographic processes.

Abstract: A thermographic element comprising in a non-aqueous binder medium a silver salt oxidizing agent in reactive association with a compound comprising a plurality of redox color releasing moieties such that oxidation of each redox color releasing moiety causes release from said compound of a thermally diffusible dye.The compounds many of which are new incorporate two or more developer moieties into a single molecule to minimize the diffusibility of the compound. Following oxidation, either directly by the silver salt or by means of a cross-oxidizing agent, each oxidized developer moiety releases a thermally diffusible dye. The compounds are of sufficient size and molecular weight to slow or prevent diffusion in imaging systems and yet possess several active developer moieties per molecule which is advantageous over known ballasted dye releasers which comprise bulky molecules with only a single developer moiety.

Abstract: The present invention provides a heat-developable photographic light-sensitive material which can give a high contrast image. A novel heat-developable photographic light-sensitive material is provided, comprising at least one compound represented by formula (I): ##STR1## wherein Z represents a non-metallic atom group necessary for the formation of a nitrogen-containing heterocyclic group.

Abstract: 2-Substituted malondialdehyde compounds are useful as co-developers in combination with hindered phenol developers to produce high contrast black-and-white photothermographic and thermographic elements.The photothermographic and thermographic elements may be used as a photomask in a process where there is a subsequent exposure of an ultraviolet or short wavelength visible radiation-sensitive imageable medium.

Abstract: Heat bleachable elements have antihalation layers composed of metallized or unmetallized formazan dyes, hexaarylbiimidzoles having alkoxy substituents and film forming binders that soften upon heating. These layers are rapidly bleached at relatively low temperatures. Polymeric acidic layers adjacent the antihalation layers provide an acidic component that increases bleaching rates when the acidic layer is also softened during processing.

Abstract: Hydrogen atom donor compounds are useful as contrast enhancers when used in combination with (i) hindered phenol developers, and (ii) trityl hydrazide and/or formyl-phenyl hydrazine co-developers, to produce ultra-high contrast black-and-white photothermographic and thermographic elements.The photothermographic and thermographic elements may be used as a photomask in a process where there is a subsequent exposure of an ultraviolet or short wavelength visible radiation-sensitive imageable medium.

Abstract: Nitrogen containing 3-heteroaromatic substituted acrylonitrile compounds are useful as co-developers in combination with hindered phenol developers to produce high contrast black-and-white photothermographic and thermographic elements.The photothermographic and thermographic elements may be used as a photomask in a process where there is a subsequent exposure of an ultraviolet or short wavelength visible radiation-sensitive imageable medium.

Abstract: A heat-developable photographic material having a light-sensitive silver halide, a reducing agent, a binder and a dye-donating compound on a support, in which at least one light-sensitive silver halide emulsion on the support contains from 1.times.10.sup.-7 to 1.times.10.sup.-3 mol, per mol of silver halide, of iron ions in the silver halide grains. The material shows little sensitivity fluctuation to variations of the temperature of exposure and shows little decrease in sensitivity on exposure with high intensity light for a short period of time, such as laser rays.

Abstract: The present invention provides a method for reproducing continuous tone images by means of a thermal head. The method involves the image-wise heat transfer of a reducing agent from a donor element to a receiving layer of a receiving element. The receiving element contains a thermoreducible silver source such as e.g. silver behenate. The process of the present invention provides high density images with multiple intermediate density levels.

Abstract: The present invention concerns a thermal imaging process using (i) a donor element comprising on a support a donor layer comprising a binder and a thermally transferable reducing agent capable of reducing a silver source to metallic silver upon heating and an oxidised form of the reducing agent being colored or being capable of forming a color and (ii) a receiving element comprising on a support a receiving layer comprising a silver source capable of being reduced by means of heat in the presence of a reducing agent and comprising the steps of:bringing said donor layer of the donor element in face-to-face relationship with the receiving layer of the receiving element,image-wise heating a thus obtained assemblage to cause image-wise transfer of the thermally transferable reducing agent from the donor layer to the receiving layer in accordance with the amount of heat applied andseparating the donor element from the receiving element.