Abstract: A method and apparatus for forming an image using an image forming sheet that is normally non-photosensitive but can be rendered photosensitive by preheating and is exposed at the preheated area to a light image to form therein a latent image and then heat-developed to form a visible image. After preheating, the preheated area is cooled by cooling means prior to exposure.

Abstract: In a photothermographic element comprising (A) at least one photosensitive layer comprising a photosensitive component, such as photosensitive silver halide or a diazotype photosensitive material, (B) at least one layer comprising a processing agent for the photosensitive component and (C) a separation polymer between (A) and (B), increased preexposure storage stability is provided by a polysulfonamide as separation polymer (C). After imagewise exposure of the photothermographic element, an image can be developed by merely heating the element to moderately elevated temperatures.

Abstract: An image-forming member for forming a metal grain image of the type containing a reducible metal compound which is able to isolate metal from it when reduced, and a reducing agent being capable of reducing the metal compound so that there may be formed a metal grain image by the metal isolated from the metal compound at the portion of the member subjected to the action of energy for producing a metal grain image-forming ability and thermal energy is characterized by the provision of a capturing means which is capable of capturing by-product produced from the metal compound upon the isolation of the metal from the metal compound.

Abstract: A heat-developable photosensitive material comprising a support having coated thereon at least on sensitive layer comprising (a) a binder and at least one of (b) an organic silver salt, (c) a photocatalyst, and (d) a reducing agent wherein said heat-developable photosensitive material additionally contains (e) a polyisocyanate and a process for preparing same are disclosed.

Abstract: This application discloses an imaging composition employing a tellurium compound sensitive to activating radiation. Such imaging compositions have been disclosed in a number of earlier patents, such as U.S. Pat. Nos. 4,142,896, 4,066,460 and 4,106,939. This application discloses improvements in the foregoing imaging compounds employing glycerol ethers or glycerol thioethers of the formulaR.sup.7 --X--CH.sub.2 CHOH--CH.sub.

Abstract: A heat-developable photosensitive material for producing an electrostatic printing master having improved electrostatic characteristics comprises a support, an organic silver salt, a reducing agent, and a binder.

Abstract: A heat-developable photosensitive member for forming an electric printing master comprises a support, an organic silver salt layer containing an organic silver salt, a halide and a toning agent dispersed in a binder, and a surface protecting layer or a particular surface, and a reducing agent is contained in at least one layer of the organic silver salt layer and a layer adjacent to the organic layer.

Abstract: There is disclosed a cobalt(III) complex-containing photographic composition, element and process which can be made negative-working or positive-working. Featured are an exposure activatible image precursor composition and a photoinhibitor composition capable of inhibiting image formation in the image precursor composition.

Abstract: Acutance agents for use in thermally developable photosensitive compositions are disclosed. These novel compositions absorb scattered light and are rendered colorless at the development temperature of the photothermographic composition.

Abstract: A novel dry image forming material comprising (a) a non-photosensitive organic silver salt oxidizing agent, (b) a reducing agent for silver ions, (c) a photosensitive silver halide or a photosensitive silver halide-forming component capable of forming a photosensitive silver halide by the reaction thereof with said organic silver salt oxidizing agent, and (d) a substituted 3-pyrazolin-5-one. The dry image forming material has improved sensitivity and storage stability of the raw image forming material and can form thereon an excellent black tone image.

Abstract: In a photothermographic silver halide composition capable of being coated on a support comprising a hydrophilic photosensitive silver halide emulsion containing a gelatino peptizer with an organic solvent mixture, a hydrophobic binder and an oxidation-reduction image-forming composition comprising (i) a silver salt of a long-chain fatty acid with (ii) an organic reducing agent, improvements are provided by a solvent mixture comprising a combination of (A) an alcohol photographic speed-increasing solvent which is a compound selected from the group consisting of benzyl alcohol photographic speed-increasing solvents and 2-phenoxyethanol speed-increasing solvents with (B) an aromatic hydrocarbon solvent that is compatible with the alcohol solvent and (C) 0 to 10% by weight of the solvent mixture of such hydrophobic binder.

Abstract: A photographic material for the production of an image in a dry process by forming a vesicle image upon the decomposition of a peroxide compound at image nuclei of silver by providing a layer containing a silver salt which forms upon exposure to light, in imagewise distribution, image nuclei. The silver salt has a grain size of less than 0.3 .mu.m and is present in the layer in an amount of from 1-500 mg/m.sup.2.

Abstract: A thermally developable light sensitive material which comprises: (a) an organic silver salt; (b) a photocatalyst and (c) a reducing agent in a support or in one or more layers provided on the support additionally comprises (d) at least one cerium compound selected from trivalent and/or tetravalent cerium compounds in the support and/or in one or more of the above layers. An improvement in various characteristics such as a long green shelf life, a high degree of whiteness, low thermal fog, high sensitivity and so on is obtained.

Abstract: A method of manufacturing embossed articles of a preset configuration utilizing a material sensitive to electromagnetic and corpuscular radiation. The method consists in coating a backing with a layer of metal, applying a barrier layer to the metal layer, coating the barrier layer with a layer of inorganic matter capable of interacting chemically with the metal layer and forming the products of interaction whose physical and chemical properties differ from those of the metal layer and the layer of inorganic matter, in projecting a picture of a preset configuration on the applied layers, exposure, and in the removal of the unnecessary portions of the layers until an embossed article of a preset configuration is produced. The barrier layer is made of a material different from the layer of metal and the layer of inorganic matter and inert with respect to the metal layer and the layer of inorganic matter in absence of electromagnetic and corpuscular radiation.

Abstract: Tellurium images are formed by the decomposition of tellurium (II) coordination complexes in the presence of a catalyst. The complexes are characterized in that at least one of the four coordination positions of the tellurium (II) is occupied by a sulfur containing ligand. Preferred ligands that can be coordinated with tellurium are sulfur containing bidentate anionic ligands. Complexes formed using these preferred ligands are more hydrolytically stable than other tellurium (II) complexes having sulfur containing ligands and yet are still capable of providing catalytic amplification.

Abstract: A heat developable photosensitive composition comprises an organic silver salt, a halide and a sulfur compound.

Abstract: An image forming method comprises adding a development accelerator for accelerating the developing function at the time of the heat-development to a heat-development type photosensitive raw material containing therein at least an organic silver salt, a halide, and a binder, at the time when the image formation is to be carried out by the process steps of exposure and heat-development.

Abstract: An image-forming agent selected from polyacids of molybdenum and tungsten and salts and complexes of these polyacids and disposed as a layer on at least one surface of a support substrate is reduced thereby being caused to undergo coloring in the form of an image and is then irradiated over its entire surface including thus colored parts and yet uncolored parts with long wavelength light rays which are absorbable by only the colored parts thereby to produce a colored image wherein the optical density of only the colored parts is selectively increased to a remarkable degree.

Abstract: A heat-developable light-sensitive material comprising on a support at least one layer containing (a) an organic silver salt; (b) a light-sensitive silver halide; (c) a reducing agent; and (d) a binder; wherein the light-sensitive silver halide component (b) comprises the reaction product obtained by decomposing an N-halo compound in the presence of the organic silver salt (a) for reaction with the organic silver salt (a) before applying the layer on the support and an embodiment includes a heat-developable light-sensitive material in which the N-halo compound is decomposed in the presence of an alcohol to form the light-sensitive silver halide component (b).

Abstract: In a dry physical development photothermographic element for a dry thermal silver-dye bleach process wherein the element comprises a silver halide complexing concentration of a silver halide complexing agent improvements are provided when the complexing agent is an organic ammonium chloride, bromide or iodide. After imagewise exposure of the element, a dye image can be produced by uniformly heating the element. Improvements are also produced by providing a dry activator element for producing a dye image in a separate photographic element by means of a dry physical development thermal dye-bleach process, wherein the activator element comprises a support having thereon a layer comprising a synthetic hydrophobic polymeric binder, a silver halide complexing concentration of a silver halide complexing agent, as described, a bleachable dye and a thermal solvent.

Abstract: A method for producing visible images in certain charge sensitive, dry processable recording elements. Image recording is accomplished by flowing, in a resistive recording element containing a reducible metal compound, an imagewise pattern of electrical current of sufficient magnitude to produce therein a storable latent image. The metal compound in the latent image areas is subsequently reduced by a dry development technique to produce a visible image.

Abstract: A process is disclosed of forming a visible ultrasonographic image in a silver halide photographic element. This is achieved by imagewise exposing the layer to ultrasonic radiation at an intensity and for a duration sufficient to alter the exposure response of the element to electromagnetic radiation, but below that which will produce a latent image in the absence of externally applied electromagnetic radiation. The element is concurrently or subsequently exposed to electromagnetic radiation to produce a latent image therein defined by the imagewise ultrasonic radiation exposure. The element is then photographically processed to produce a visible image corresponding to the latent image.

Abstract: A photosensitive recording material containing in admixture in a binder medium:(1) as imaging substance an organo-tellurium compound containing directly linked to a tellurium atom halogen and at least one organic substituent comprising at least one carbonyl group,(2) a photoreductant which upon exposure to activating radiation in the presence of a hydrogen-donating compound reduces said organo-tellurium compound to liberate metallic tellurium and halogen acid,(3) a hydrogen-donating compound from which hydrogen can be abstracted by the photo-exposed photoreductant, and(4) an organic reducing agent precursor, from which by the action of an acid a compound capable of reducing said organo-tellurium compound can be set free.

Abstract: A heat developable photographic material comprising in reactive association (a) photosensitive silver halide, (b) an image-forming combination comprising (i) a complex of silver with a nitrogen acid selected from the group consisting of imidazole, pyrazole, urazole, 1,2,4-triazole and 1H-tetrazole nitrogen acids or combinations thereof, with (ii) an organic reducing agent, and (c) a polymeric binder, provide developed images without the need for processing solutions or baths. An image can be developed in this heat developable material by merely heating the material to moderately elevated temperatures. Other addenda employed in heat developable materials can be employed with the heat developable photographic materials described.

Abstract: There is provided an image-forming material of a laminar structure comprising:a substrate;an image-forming layer provided on at least one surface of the substrate and containing an image-forming agent selected from the group consisting of polyacids of molybdenum and tungsten and salts and complexes of these polyacids; anda transparent polymer film provided on the image-forming layer,at least one of the image-forming layer and the transparent polymer film containing a reducing agent.The image-forming material may be used in a one-stage image-forming process comprising irradiation thereof with image-wise light-rays including ultraviolet and visible and/or infrared rays or a two-stage image-forming process comprising irradiation thereof with image-wise ultra-violet rays and then with visible and/or infrared rays.

Abstract: In a process for producing thermally developable light-sensitive composition which comprises heating a composition containing (a) an organic silver salt and (b) a light-sensitive silver halide, the improvement wherein the heating is conducted in the presence of (c) a sulfur-containing compound.

Abstract: A heat developable photosensitive material comprising:(a) an organic silver salt oxidizing agent;(b) a halogen molecule or an organic haloamide compound;(c) a reducing agent for silver ion; and(d) a nitrogen-containing organic base whose pKa of the conjugate acid ranges from 0.5 to 10.0 and the nitrogen-containing organic base having, in its molecule, no acidic proton or a nitrogen-containing organic base whose pKa of its conjugate acid ranges from 0.5 to 10.0 and the nitrogen-containing organic base having, in its molecule, an acidic proton whose pKa is more than 12.

Abstract: In a method of producing a composition for use in thermally developable light-sensitive photographic elements comprising mixing: a composition comprising (a) an organic silver salt and (b) a light-sensitive silver halide, and (c) a reducing agent; the improvement wherein (b) is prepared by allowing a light-sensitive silver halide-yielding component to react with (a) in the presence of (d) an imino compound.The elements so produced are also described.

Abstract: Half soaps of organic acids and silver salts of the organic acids are formed by converting alkali metal or ammonia salts of the organic acid to the silver salt of the acid at a pH of less than 9.0 to improve the conversion percentage and improve the general quality of the half soap.

Abstract: A process for forming an image is disclosed wherein a photo-sensitive image-forming material composed of a support and a layer of a thermoplastic photo-sensitive composition which is not adhesive at ordinary temperatures, is exposed and developed by heating in intimate contact with a peeling development carrier sheet at least one surface of which is composed of a thermoplastic material not adhesive at ordinary temperatures, and, subsequently, peeling the development carrier sheet from the photo-sensitive image-forming material.

Abstract: A Te(II) complex represented by the formula: RTeM(R').sub.3 wherein M is lead, tin, germanium or silicon; R and R' are alkyl or aryl is useful in an imaging material to provide a non-silver image. The imaging material can be a photographic material, especially a heat-developable photographic material containing, for example, a photosensitive metal salt other than the Te(II) material or other sources of developable nuclei.

Abstract: An activator-stabilizer precursor which comprises a certain acylhydrazine which releases a base moiety upon being heated to a temperature above about 130.degree. C. provides improved heat developable and heat stabilizable photographic materials comprising, in binder, and in reactive association, (a) a photosensitive silver salt, (b) a photosensitive silver salt developing agent, and (c) a stabilizing concentration of the described activator-stabilizer precursor having an acid portion and a base portion. The heat developable and heat stabilizable photographic element provides essential freedom from visual crystal formation in the processed photographic element. After imagewise exposure, a developed and stabilized image can be produced in the photographic element by heating the element to processing temperature.

Abstract: A process for preparing a composition for use in a thermally developable light-sensitive material which comprises reacting (a) an organic silver salt with (b) a halogen atom-releasing compound to form a mixture of the organic silver salt and a silver halide wherein the reaction of components (a) and (b) is carried out while controlling the oxidation-reduction potential of the reaction solution. Silver halide grains of a uniform grain size and a narrow grain size distribution can be obtained, and, after (c) a reducing agent is added to the composition, the resulting composition can be used to produce a thermally developable light-sensitive material having superior sensitivity and contrast.

Abstract: Tellurium images are formed by the decomposition of tellurium (II) coordination complexes in the presence of a catalyst. The complexes are characterized in that at least one of the four coordination positions of the tellurium (II) is occupied by a sulfur containing ligand. Preferred ligands that can be coordinated with tellurium are sulfur containing bidentate anionic ligands. Complexes formed using these preferred ligands are more hydrolytically stable than other tellurium (II) complexes having sulfur containing ligands and yet are still capable of providing catalytic amplification.

Abstract: A dry image forming material comprising:(a) a non-photosensitive organic silver salt oxidizing agent;(b) a reducing agent for silver ion; and(c) a compound of the formula, ##STR1## wherein R.sup.1 and R.sup.2 independently represent an aryl group or a substituted aryl group; and X represents a chlorine atom, a bromine atom or an iodine atom.

Abstract: An imaging system and process wherein an element comprising a cobalt complex-developer redox system is catalyzed by cobalt sulfide. The cobalt sulfide can be imagewise produced by exposing a photoreducible cobalt complex in the presence of a thioamide, or it can be uniformly distributed and either masked in an imagewise fashion, or reacted with imagewise distributed color developing agent.

Abstract: An electric current conductive composition comprising benzotriazole or a derivative thereof and a substantially electrically insulating binder, which is an essential component of an image recording element. The image recording element comprises a support having thereon a layer of the electric current conductive composition further containing a reducible metal compound, preferably an organic silver salt, a reducing agent, and having on different sides thereof an electrically conductive layer, with at least one of the electrically conductive layers being capable of transmitting actinic radiation. Image recording is accomplished by passing in the image recording element an image-wise pattern of an electric current sufficient to produce therein a storable latent image, followed by heating at least the electric current conductive composition layer to produce a visible image at the areas where the electric current passed through the electric current conductive composition.

Abstract: In a heat developable photographic material and process for providing a dye enhanced silver image, an element comprising a support having thereon in reactive association: (A) at least one heat developable photographic layer comprising (i) photosensitive silver halide, (ii) at least one active silver halide developing agent, (iii) an activating concentration of a development activator precursor, and (iv) a polymeric binder and (B) at least one layer comprising an azoaniline dye that is bleached in the non-image areas of the described element upon development of a latent image in the layer (A) by uniformly heating, can provide an improved image. After imagewise exposure of the described heat developable material, a dye enhanced silver image can be provided by heating the element containing the described combination of layers and materials.

Abstract: A covering power, heat developable photographic material comprising, in binder, and in reactive association (a) negative-working photosensitive silver halide, (b) an image-forming combination comprising (i) an organic silver salt oxidizing agent containing a heterocyclic thione ligand or 1,2,4-mercaptotriazole ligand with (ii) an organic reducing agent and (c) a nucleating concentration of a hydrazino thiourea nucleating agent, enables a positive image to be developed and, in most cases, stabilized even though the photothermographic material contains no separate post-processing image stabilizer. The heat developable silver halide photographic material also enables development efficiency that is better than in those photothermographic silver halide materials not based on covering power imaging. A positive image can be developed in the heat developable photographic material after imagewise exposure by merely heating the material to moderately elevated temperatures.

Abstract: A thermally developable light-sensitive material wherein heat fog is prevented comprising a support having therein or in one or more layers thereon (a) an organic silver salt, (b) a photo catalyst and (c) a reducing agent and containing (d) a phthalimide having at least one electron-attracting substituent, such as a halogen atom or an acyl group.

Abstract: Certain azo compounds are useful as spectral sensitizing dyes in photographic silver halide materials, and particularly in photothermographic materials. These azo compounds comprise moieties capable of forming substantially insoluble silver salts thereby substantially improving sensitization of silver halides.