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: The present invention provides a fixer composition and a method of processing an exposed photographic silver halide element comprising the steps of developing by means of a developer comprising a silver halide developing agent and treating the developed element with a fixer composition, wherein the fixer composition comprises a silver halide solvent, a sulfite ion source, an aluminum salt hardening agent, a buffering agent, a sequestering agent and an .alpha.-ketocarboxylic acid compound in an amount of more than 2 grams per liter corresponding to the formula:R--CO--COOHwherein R represents a hydrogen atom or an organic group.

Abstract: The present invention relates to a method for the preparation of a tabular silver halide grain emulsion, wherein said silver halide emulsion comprises tabular grains having a thickness lower than 0.5 .mu.

Abstract: The present invention relates to a process for improving the ageing properties of a silver halide photographic element, free of photolytically generated latent images, comprising a support bearing at least one light-sensitive silver halide emulsion layer and at least one light-insensitive layer, the silver halide light-sensitive emulsion layer including negative acting surface latent image-type silver halide grain in association with a contrast promoting agent and a hydrazine compound, by adding a total amount of at least 0.40 grams per square meter of dextran to at least said light-sensitive silver halide emulsion layer and/or to at least said light-insensitive layer.

Abstract: The present invention relates to a silver halide photographic material comprising a support and at least one silver halide emulsion layer coated thereon, wherein said silver halide photographic material comprises tabular silver halide grains having an average aspect ratio higher than 3:1 dispersed in highly deionized gelatin, and a pyridinium carbamoyl hardener having the following formula: ##STR1## wherein R.sub.1 and R.sub.2 each independently represents an alkyl group having from 1 to carbon atoms, an aryl group having from 6 to 15 carbon atoms, an aralkyl group having from 7 to 15 carbon atoms, or R.sub.1 and R.sub.2 together form the atoms required to complete a heterocyclic ring, R.sub.3 represents a hydrogen atom, a halogen atom, an alkyl group having from 1 to 10 carbon atoms, an alkoxy group having from 1 to 10 carbon atoms, a carbamoyl group, a ureido group, and R.sub.4 represents an alkylene group having from 1 to 4 carbon atoms or a single chemical bond.

Abstract: A photographic film construction at least one side of which is coated with an antistatic layer comprising a binder of gelatin grafted to a poly(ethylenic) polymer having acid functional groups on the polymer and a dispersion of vanadium oxide particles in the grafted gelatin binder.

Abstract: A compound having a nucleus of the formula: ##STR1## The compounds are suitable for use as image stabilisers and antifoggants in photothermographic materials and exhibit acceptably low sensitization of human skin.

Abstract: The present invention provides adhesive articles that include more than one adhesive, or if one adhesive is used, include more than one adhesive portion, where, in each portion, the extent of cure of the adhesive is varied in a predetermined manner so that each adhesive portion behaves as if it were two or more different adhesives. The adhesive articles of the present invention are typically provided as adhesive tapes, often in the form of a tape having a longitudinal dimension (down-web dimension) that far exceeds its width (cross-web dimension).

Abstract: A medical X-ray film comprising a transparent base coated on at least one side with (a) a laminar grain silver halide emulsion and (b) a separate hydrophillic colloid layer containing a developing agent for silver halide in an amount corresponding to at least 0.5 moles per mole of the silver coated on that side of the base.

Abstract: The present invention relates to a black-and-white aqueous alkaline photographic developer composition, free of dihydroxybenzene developing agent, comprising a reductic acid developing agent and an auxiliary superadditive developing agent, wherein the reductic acid developing agent is represented by the formula (I): ##STR1## wherein, R.sub.1, R.sub.2, R.sub.3 and R.sub.4 each are selected from the group consisting of hydrogen and group CH.sub.2 R.sub.5, wherein R.sub.5 is hydrogen or a monovalent group, e.g. amino, cyano, halogen, hydroxyl, carboxyl, sulfonyl, alkyl, cycloalkyl, aryl.A process for forming a black-and-white photographic silver image comprising developing a silver halide photographic element with said black-and-white aqueous alkaline photographic developer composition is also described.

Abstract: A thermographic element containing: (a) a substrate; (b) an image-forming layer coated onto the substrate; and (c) overlaying the image-forming layer, a topcoat layer composed of the reaction product of (1) a polymer composed of interpolymerized units derived from: (i) about 45-65 wt % of vinyl-substituted aromatic monomer; (ii) about 15-30 wt % vinyl monomer containing a pendant nitrile group; (iii) about 5-30 wt % hydroxyl-containing; ethylenically-unsaturated monomer; and (2) a suitable crosslinking agent. A slip agent is optionally used. The topcoat layer provides a thermographic element with high gloss in the imaged areas; has excellent runnability with no chatter in the feed direction of the element; and exhibits no removal of topcoat which prevents formation of printhead-created voids in the imaged areas.

Abstract: A photosensitive polymer-containing system containing: (a) an energy sensitive polymer having a linear hydrocarbyl backbone and pendant peptide groups with free-radically polymerizable functionality attached thereto; (b) a vinyl-halomethyl-s-triazine capable of free-radical generation upon excitation with electromagnetic radiation having a wavelength of from about 330 to 500 nm; (c) an organic acid having a pKa of from about 1.8 to 5.5; (d) a leuco dye; and (e) a binder. A colorant may optionally be added. The photosensitive systems exhibit an increased shelf-life and excellent photosensitivity.

Abstract: A core-shell silver bromoiodide emulsion having an inner core portion consisting essentially of silver bromoiodide and an outer shell portion consisting essentially of silver bromoiodide, wherein said inner core portion has a silver iodide content ranging from 30 to 50 mol %, said outer shell portion has a silver iodide content ranging from 1 to 10 mol %, and the average total silver iodide content ranges from 5 to 12 mol %, and wherein the ratio between the area of the X-ray diffraction peak corresponding to said outer shell portion and the area of the X-ray diffraction peak corresponding to said inner core portion is higher than 9:1.

Abstract: The present invention relates to a silver halide photographic material comprising a support, at least one silver halide emulsion layer coated thereon, and a hydrophilic colloid layer coated on said at least one silver halide emulsion layer, wherein said hydrophilic colloid layer comprises a combination of (a) at least one surfactant selected from the group consisting of non-ionic polyoxyethylene surfactants and anionic polyoxyethylene surfactants and (b) at least one surfactant selected from the group consisting of non-ionic perfluoroalkylpolyoxyethylene surfactants and polyoxyethylene-modified polysiloxane surfactants.

Abstract: Brochures, pamphlets, books, and the like containing a plurality of laser-perforated paper which has been folded and bound (in either order) on the lines of perforation have, among other things, substantially improved compressed, lay-flat properties (i.e., significantly reduced bowing) as compared to conventional perforated paper containing books, pamphlets, and the like. Additionally, the inventive articles have surprisingly high strength on the lines of perforation and low paper slippage as well. The inventive processes provide for an easy and efficient way to produce brochures, pamphlets, signatures, and other paper-based products which are easy to handle, store, and transport.

Abstract: Various catalyst precursors are used for the thermal decomposition of azide-containing polymers and oligomers. The catalyst precursors are organometallic complexes which upon thermolysis are capable of liberating at least one coordination site, thereby generating a catalyst for the thermal decomposition of the azide-containing polymer or oligomer.

Abstract: Acrylonitrile compounds are useful as co-developers when used in combination with hindered phenol developers to produce high contrast black-and-white photothermographic and thermographic elements.Acrylonitrile compounds are also useful as co-developers when used in combination with (i) hindered phenol developers, and (ii) trityl hydrazide and/or formyl-phenyl hydrazinc 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: Hydroxamic acid 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: Trityl hydrazides and formyl-phenyl hydrazines are useful as co-developers with hindered phenols in phothothermographic and thermographic elements. These co-developers have the formula:R.sup.1 --(C.dbd.O).sub.n --NHNH--R.sup.2R.sup.1 represents hydrogen and R.sup.2 represents an aryl or substituted aryl group; or,R.sup.1 represents hydrogen, alkyl and alkenyl groups of up to 20 carbon atoms; alkoxy, thioalkoxy, or amido groups of up to 20 carbon atoms; aryl, alkaryl, or aralkyl groups of up to 20 carbon atoms; aryloxy, thioaryloxy, or anilino groups of up to 20 carbon atoms; aliphatic or aromatic heterocyclic ring groups containing up to 6 ring atoms; carbocyclic ring groups comprising up to 6 ring carbon atoms; or fused ring or bridging groups comprising up to 14 ring atoms; and R.sup.2 represents a trityl group.