Abstract: The addition of a boric acid or borate ion to a poly(vinyl acetal) composition has been found to cause hardening of the composition. The hardened composition is particularly useful in photothermographic emulsions having a poly(vinyl acetal) layer.

Abstract: A heat-developable photographic material comprising (a) an organic silver salt, (b) a photocatalyst, (c) a reducing agent, (d) a binder, and (e) at least one compound selected from the compound represented by the general formula (I) described below and the compound represented by the general formula (II) described below. ##STR1## wherein X represents a halogen atom; and R represents a hydrogen atom, an alkyl group, an aryl group, an aralkyl group, an acyl group, a carbamoyl group, an alkylsulfonyl group, an arylsulfonyl group, an aralkylsulfonyl group or a heterocyclic residue, ##STR2## wherein X represents a halogen atom; Z represents a sulfur atom, an oxygen atom or >N--R.sub.1 (wherein R.sub.1 represents an alkyl group, an aryl group or an acyl group; (R')n represents a substituent present on the benzene nucleus; and n represents 0 or an integer from 1 to 4.

Abstract: A composition suitable for application as a layer on a heat-developable image-pattern recording material to enhance the developability and stability thereof, comprising a silver salt of a benzotriazole, a reducing agent, a binder, at least one compound having the following Formula [I]: ##STR1## wherein R.sub.1 represents a hydrogen, an amino radical, or a substituted or unsubstituted alkyl, alkenyl or aryl radical; R.sub.2 represents a hydrogen, an amino alkyl, alkenyl or aryl radical is disclosed. The disclosed composition has improved developability.

Abstract: Photographic silver halide is spectrally sensitized by means of at least one bleachable spectral sensitizing dye comprising a cyanine dye nucleus and a particular N-methylene substituent. The spectrally sensitized photographic silver halide is useful in a photothermographic material. An image in the photothermographic material, after exposure, is developed and the spectral sensitizing dye is bleached, especially at elevated pH, by heating the photothermographic material to processing temperature.

Abstract: A coupler containing in the coupling position a carbamoyloxy group ##STR1## upon oxidative coupling, releases a carbamic acid fragment that, in turn, is capable of thermally releasing ammonia or an amine. Such a carbamoyloxy substituted coupler and carbamic acid fragment are useful in imaging such as in photothermography and thermography. Ammonia or an amine released from the carbamic acid fragment enables imaging in imaging materials that are responsive to ammonia or an amine. The carbamoyloxy substituted coupler also generally is a dye-forming coupler that reacts with the oxidized form of a color developing agent to form a dye. An image is produced in an exposed photothermographic material comprising the carbamoyloxy substituted coupler by thermal development. An image is produced in a thermographic material comprising the carbamoyloxy substituted coupler and a color developing agent by imagewise heating the thermographic material.

Abstract: A narrow range of dinuclear spectral sensitizing dyes can be used in photothermographic silver halide emulsions without adversely affecting fog and speed levels with concentration variations.

Abstract: A heat-developable photographic material is disclosed. The material is comprised of (a) an organic silver salt, (b) a photocatalyst, (c) a reducing agent, (d) a binder, and (e) at least one compound selected from the group consisting of 2-trihalogenomethyl-3,4-oxadiazoles and the derivatives thereof as an antifogging agent. The use of component (e) does not present environmental pollution problems and successfully reduces fog density.

Abstract: A novel dry image forming material comprising in one or more layers on a support (a) a non-photosensitive organic silver salt oxidizing agent, (b) a reducing agent for silver ions, (c) a silver halide component or a silver halide-forming component, (d) a toning agent and (e) a lipophilic binder, characterized by the inclusion of a specific 2-(2'-hydroxyphenyl)benzotriazole compound having bulky tert-butyl or tert-amyl groups at its ortho- and para-positions relative to the hydroxyl group in a layer containing the component (a). The dry image forming material of the present invention has high storage stability prior to use for image formation.

Abstract: A UV sensitive dry silver photothermographic construction for graphic arts use can be freely handled for one to two minutes under cool white fluorescent lighting or incandescent lighting. The construction comprises in sequence:a. a substrate,b. a continuous layer of a dry silver dispersion coating containing an organic silver full soap/half soap blend, a reducing agent, halide ion, and a binder resin, andc. a continuous protective topcoat layer comprising a cellulose acetate resin admixed with an effective amount of a development accelerator,said construction further comprising (1) halide ion in said silver dispersion coating or in said topcoat layer, said halide ion being at least 96 mole percent chloride ion, said halide ion when present in said dispersion coating being admixed in said dispersion subsequent to the admixing of at least a portion of said binder resin with said organic silver soap blend, and (2) an antihalation agent in any of the aforementioned layers or in a separate layer.

Abstract: A heat-developable photosensitive material is disclosed having a high image sharpness. The material is comprised of a heat-developable photosensitive layer which includes an organic silver salt, a photocatalyst, and a reducing agent. An antihalation layer is provided on the opposite face of the material with respect to the side intended for imagewise exposure. The antihalation layer contains a photosensitive halogen-containing compound which reduces the pH of the antihalation layer by photolysis and is colored with a dye which causes a change of color when the pH of the antihalation layer is reduced.

Abstract: A photothermographic emulsion can be provided with enhanced image density by using an indoaniline leuco dye, aromatic carboxylic acid, and p-alkylphenyl sulfonic acid in reactive association with the emulsion.

Abstract: A heat-developable photosensitive material is described comprising a heat-developable photosensitive layer containing at least an organic silver salt, a photocatalyst, and a reducing agent, wherein the improvement is an antihalation layer comprising a light bleachable colored composition composed of at least (1) a photosensitive halogen-containing compound, and (2) a merocyanine dye, provided on the opposite side of said heat-developable photosensitive layer with respect to the side intended for imagewise exposure.

Abstract: Photothermographic emulsions may be stabilized against latent image fade and/or may have their speed increased by the addition of diazepines and fused aromatic diazepines.

Abstract: A heat developable silver image forming material comprising:(a) an organic silver salt oxidizing agent;(b) a compound or a composition capable of forming a photosensitive silver compound by reaction with the organic silver salt oxidizing agent (a);(c) a reducing agent for silver ion; and(d) a compound having a unit of ##STR1##

Abstract: A dye-forming electrically activatable recording element comprises an electrically conductive support having thereon (a) an electrically activatable recording layer comprising in an electrically conductive polymeric binder, an organic silver salt and a reducing agent, (b) a photoconductive layer separated from (a) by an air gap of up to 20 microns, and (c) an electrically conductive layer on (b), wherein the recording layer (a) comprises in reactive association, (A) a dye-forming coupler, and (B) an oxidation-reduction combination comprising (i) an organic silver salt oxidizing agent, with (ii) a reducing agent which in its oxidized form forms a dye with the dye-forming coupler. The recording element can be room light handleable and can provide a dye image and silver image by dry development processing.

Abstract: In an electrically activatable recording element, such as one comprising an electrically conductive support having thereon, in sequence: (a) a polymeric electrically active conductive (EAC) layer, (b) an electrically activatable recording layer comprising (A) a dye-forming coupler, and (B) an oxidation-reduction combination comprising (i) an organic silver salt oxidizing agent, such as a silver salt of a 1,2,4-mercaptotriazole derivative, with (ii) a reducing agent which, in its oxidized form, forms a dye with the dye-forming coupler, (c) a photoconductive layer separated from (b) by an air gap of up to 20 microns, and (d) an electrically conductive layer; improvements are provided by means of a polymeric EAC layer (a) comprising a halogen containing polyester, such as poly(2,2'-oxydiethylene:2,2'-dimethyl 1,3-propylene 50:50-2,5-dibromoterephthalate) and poly(ethylene:2,2-dimethyl-1,3-propylene 50:50-2,5-dibromoterephthalate).

Abstract: A heat developable photosensitive material having two or more layers superimposed on a support and containing at least (a) an organic silver salt, (b) a photocatalyst and (c) a reducing agent in one or more such layers, at least one said layers containing (d) a polymer having a repeating unit of the formula: ##STR1## wherein R is a hydrogen atom or a lower alkyl group; and X is a hydrogen atom, or one to three groups selected from the group consisting of a halogen atom, a nitro group, a cyano group, an alkyl group, an alkoxy group, an alkoxycarbonyl group, an alkylsulfonyl group, an aryloxy group, an acyl group, an acyloxy group and an acylamido group.

Abstract: Imaging means, such as a tetrazolium salt, capable of reduction to form a visible image is present in a radiation-sensitive layer in combination with a photoreductant incorporating one or more labile hydrogen atoms and capable of producing a reducing agent precursor in radiation-struck areas of the layer. An image is produced in the layer by processing the layer after imagewise exposure to actinic radiation.

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: 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: Copy sheet comprising substantially transparent dye layer which can undergo color shift in response to color developer composition. Preferred dye comprises pH sensitive dye and preferred color developer comprises weak acid.

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: A thermally developable light-sensitive element comprising a support having in one or more layers thereon at least (a0) an organic silver salt, (b) light-sensitive silver halide grains and (c) a reducing agent, wherein the average grain size of the light-sensitive silver halide grains is not less than about 0.05 .mu. and the support is gas permeable and, in addition, carries thereon a subbing layer composed of at least one copolymer selected from the group consisting of a vinyl chloride type copolymer in which vinyl chloride is present in the copolymer in an amount of about 50 molar % or higher and a vinylidene chloride type copolymer in which vinylidine chloride is present in the copolymer in an amount of about 50 molar % or higher. The thermally-developable light-sensitive element of the invention is highly sensitive and in addition, has a good storage stability retaining on storage the properties possessed by the "fresh" photosensitive element even under high humidity and/or high temperature conditions.

Abstract: Thermographic and photothermographic materials are provided by using organic or inorganic silver salts complexed with coordinating compounds having a gross stability constant between 4.50 and 10.00. When the complexed silver salt is in catalytic proximity to photosensitive silver halides, photothermographic elements are produced.

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: An improved heat-developable photosensitive material is disclosed which comprises an infrared rays-absorbing layer provided in contact with or adjacent to a layer comprising a reducible organic silver salt.

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: 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.