Abstract: A monosheet black and white substantially light-insensitive thermographic recording material comprising a thermosensitive element and a support, the thermosensitive element containing one or more substantially light-insensitive organic silver salts, one or more reducing agents consisting of one or more 1,2-dihydroxybenzene-compounds in thermal working relationship therewith and a binder, wherein the molar ratio of molar hydroxy-equivalents of the 1,2-dihydroxybenzene compounds to molar silver-equivalents of the substantially light-insensitive organic silver salts is between 1.2 and 6.0; the 1,2-dihydroxybenzene-compounds have a —(CH═CH)nR group in the 4 position wherein n is zero or an integer and R is a substituent with a Hammett &sgr;p constant >0.35 and <0.

Abstract: A monosheet black and white substantially light-insensitive thermographic recording material comprising a thermosensitive element and a support, the thermosensitive element containing one or more substantially light-insensitive organic silver salts, one or more reducing agents consisting of one or more 1,2-dihydroxybenzene-compounds in thermal working relationship therewith and a binder, wherein the molar ratio of molar hydroxy-equivalents of the 1,2-dihydroxybenzene compounds to molar silver-equivalents of the substantially light-insensitive organic silver salts is between 1.2 and 6.0; the 1,2-dihydroxybenzene-compounds have a —(CH═CH)nR group in the 4 position wherein n is zero or an integer and R is a substituent with a Hammett &sgr;p constant >0.35 and <0.

Abstract: A substantially light-insensitive black and white thermographic recording material comprising a thermosensitive element and a support, the thermosensitive element containing at least one substantially light-insensitive organic silver salt, at least one organic reducing agent therefor in thermal working relationship therewith, a binder, at least one stabilizer and optionally an &agr;,(&ohgr;-alkyldicarboxylic acid with a straight chain alkyl group having at least 4 carbon atoms which may be substituted, however neither including 3,5-dihydroxybenzoic acid as acidic reagent nor di-tert-butyl-p-cresol as a sole organic reducing agent, wherein the at least one stabilizer is represented by formula (I): R1—(O═C)—R2—(C═O)—R3  (I) wherein R2 is a divalent straight chain saturated hydrocarbon group with 2 or 3 carbon atoms which may be substituted with one or more of ═O, ═S, ═CR4R5, an alkyl group, a cycloalkyl group, a hydroxy group, a thiol group, a —

Abstract: A method of manufacturing a luminescent article comprising a self-supporting or supported phosphor containing layer having thereon a protective coating, said method comprising the step of applying on top of said phosphor containing layer a radiation-curable liquid coating composition having at the coating temperature a viscosity of at least 450 mPa.s, the viscosity at that temperature being measured with a Hoeppler viscometer.

Abstract: In accordance with the present invention a luminescent article is provided which luminescent article comprises a self-supporting or supported layer of phosphor particles dispersed in a binding medium and a protective coating thereover characterised in that the binding medium comprises one or more rubbery and/or elastomeric polymers, in that the ratio by volume of pigment to binding medium is at least 70:30 and at most 92:8 and the packing ratio is less than 67%. By said rubbery and/or elastomeric polymers the phosphor layer has improved elasticity of the screen, high protection against mechanical damage and thus high ease of manipulation and high pigment to binder ratio. Moreover no compression manipulation is necessary to get a thinner coated phosphor layer with reduced voids, and nevertheless a better image quality, i.a. sharpness, is obtained. One or more antioxidants may be present.

Abstract: A screen, comprising a self-supporting or supported phosphor layer with phosphor particles (PP) dispersed in a polymeric binder (B), said phosphor particles (PP) being present in said binder (B) in a volume ratio PP/B of at least 80/20 is provided wherein the polymeric binder comprises at least one polymer (P) having a T.sub.g .ltoreq.0.degree. C., an average molecular weight (MG.sub.avg) between 5000 and 10.sup.7, being soluble in ethylacetate for at least 5% by weight (% wt/wt) and a self-supporting layer of said polymer P comprising 82% by volume of phosphor particles and having a tickhess so has to comprise 100 mg of phosphor particles per cm.sup.2, has an elongation at break of at least 1%.The screen or panel shows low screen structure mottle and a very good compromise between speed and resolution.

Abstract: A luminescent article comprising a self-supporting or supported layer of phosphor particles dispersed in a binding medium and a protective coating thereover wherein the binding medium consists essentially of one or more hydrogenated styrene-diene block copolymers, having a saturated rubber di-block or tri-block having a styrene endblock on respectively one or both sides of the di-block or tri-block, as rubbery and/or elastomeric polymers. The ratio by volume of phosphor to binding medium is more than 70/30 and preferably more than 85/15. By using the hydrogenated diene copolymers which are rubbery and/or elastomeric polymers, the phosphor layer has improved elasticity, high protection against mechanical damage and thus high ease of manipulation and high pigment to binder ratio without deterioration after frequent reuse.

Abstract: A combination is provided comprising a supported or self supporting photostimulable phosphor panel, comprising a photostimulable phosphor layer, the phosphor being capable of storing energy upon irradiation with X-rays and of releasing the stored energy as stimulated emission light upon irradiation with stimulating light and collecting means for stimulated emission light, and showing a restricted angular aperture. The combination comprises a volume reflection hologram H1, situated between the phosphor panel and the light collecting means. The volume reflection hologram H1 reflects stimulated emission light entering the volume reflection hologram under any angle outside a restricted angle, determined by the angular aperture of the collecting means and transmits stimulated emission light entering the volume reflection hologram under the predetermined restricted angle.

Abstract: A coating composition suitable for forming an adhesive primer layer on a hydrophobic polyester resin support, wherein said coating composition essentially consists of (an) addition polymerizable monomer or mixture of such monomers having dissolved therein at least one of the polymers (i) and/or (ii), wherein:(i) is a linear copolyester of isophthalic acid and at least one other dibasic carboxylic acid with an aliphatic diol, said copolyester being soluble in methyl methacrylate for at least 10 g per 100 ml at 20.degree. C., and/or(ii) is a linear polyester of terephthalic acid and/or isophthalic acid with an oxyalkylated bisphenol, said polyester being soluble in methyl methacrylate for at least 10 g per 100 ml at 20.degree. C., and wherein said composition comprises said monomer(s) acting as solvent(s) for polymers (i) and/or (ii) in a 20 to 70% by weight ratio with respect to the totality of said polymer(s) and monomer(s).

Abstract: An X-ray recording system is provided characterised in that(i) a double sided X-ray film is arranged between an X-ray intensifying screen and a reflecting sheet material(ii) said reflecting sheet material has at least one reflecting side(iii) the total white light reflection of said reflecting side is at least 30%(iv) said reflecting side of said reflecting sheet material is kept in close contact with one of the emulsion layers of said double sided X-ray film. Preferably said reflecting side shows a total white light reflection at least 50%.

Abstract: X-ray intensifying screens of different speed classes are disclosed, showing a synergistic effect between screen speed or sensitivity and image quality, especially sharpness, if for each speed class the right combination is applied for the amount of dye in the screens and the weight amount and weight coverage of selected mixtures of yttrium tantalate or niobate phosphor and rare earth activated alkaline earth metal fluorohalide phosphors coated onto selected supports showing well-determined reflectance characteristics.

Abstract: A radiographic screen comprising (1) a metal or hydrophobic resin support, (2) a layer comprising a fluorescent phosphor dispersed in an organic polymeric binder and (3) an optionally present outermost organic polymer coating protecting said phosphor layer against abrasion, characterised in that the edges (side surfaces) of said screen are covered with a polymer material being formed essentially from a moisture-hardened polymer composition.