Abstract: The present invention provides a heat-sensitive recording material comprising a substrate having disposed thereon at least a heat-sensitive recording layer comprising: microcapsules; diazonium salt compounds contained within the microcapules and represented by the following general formula (I); and a coupler which undergoes coupling-reaction with the diazonium salt compounds to cause color development, wherein three or more of the diazonium salt compounds represented by the general formula (I) are contained in the same microcapsule: (wherein R1, R2 and R3 each independently represents an alkyl group, a substituted alkyl group, an aryl group or a substituted aryl group; and X− represents a counter anion).

Abstract: A photosensitive thick film composition is provided which has superior storage stabilities and can be reliably processed by developing. The photosensitive thick film composition is composed of a photosensitive organic component containing an organic binder having an acidic functional group, such as a carboxyl group, an inorganic component containing a polyvalent metal oxide, such as borosilicate glass, and an alcohol having a plurality of hydroxyl group, such as glucitol.

Abstract: A diazo heat-sensitive recording material having excellent raw stock storability and image storage characteristics, which comprises a support having thereon a recording layer comprising a diazo compound, a coupling component and an organic base. The diazo compound is a 4-disubstituted amino-2-alkoxybenzenediazonium salt and the coupling component is a compound represented by the following general formula: ##STR1## wherein R.sub.4, R.sub.5, R.sub.6 and R.sub.7 each represents a hydrogen atom, an alkyl group, an aryl group, an aralkyl group, an alkyloxy group, an aryloxy group, an alkylthio group, an arylthio group, an acyl group, an alkoxycarbonyl group, an acyloxy group, a carbamoyl group, a sulfamoyl group, a halogen atom, a cyano group or a nitro group.

Abstract: A chemiluminescent detecting method includes the steps of uniformly irradiating with radiation a stimulable phosphor sheet formed with a stimulable phosphor layer containing a stimulable phosphor which can store an energy of radiation and be stimulated by visible light to emit the energy of radiation in a form of light, thereby storing energy of radiation uniformly therein, selectively labeling a biopolymer with a labeling substance which can produce chemiluminescent light by contact of itself and a chemiluminescent substance, causing the biopolymer labeled with the labeling substance and the chemiluminescent substance to come into contact with each other, and exposing the stimulable phosphor sheet to chemiluminescent light produced by the contact of the biopolymer labeled with the labeling substance and the chemiluminescent substance.

Abstract: An photosensitive polyfunctional aromatic diazo compound having at least two groups of Formula (uD) in the molecule, and a photosensitive composition using the same. The diazo compound can be handled under visible light free from ultraviolet, is highly photosensitive, has good shelf life, and is adequate as a photosensitive agent for lithographic printing plates and screen printing plates: ##STR1## wherein G.sup.1 is a substituent derived from alcoholic hydroxyl group; R.sup.1 and R.sup.2 are hydrogen, or alkyl or alkyloxy of 1 to 8 carbon atoms;R.sup.3 is alkyl or substituted alkyl of 1 to 8 carbon atoms, aralkyl or substituted aralkyl of 7 to 14 carbon atoms, or --CH.sub.2 CHG.sup.2 --CH.sub.2 --;X.sup.- is an anion based on protonic acid from which a proton is removed.

Abstract: An aromatic diazo compound having at least two groups of Formula (I) in the molecule.This aromatic diazo compound can be handled under visible light free from ultraviolet, is high in photosensitivity, and can be produced by a simple synthesis method.The diazo compound has a high solubility in organic solvents, appropriate for use as a photosensitive material for a lithographic printing plate, can be easily developed by an alkaline developing solution mainly based on an alkaline aqueous solution, and has a water solubility appropriate for use in a screen printing plate. ##STR1## wherein Z.sup.1 indicates ##STR2## wherein .phi..sup.1 is arylene or substituted arylene; and -.phi..sup.2 is >C.dbd.O, lower alkyl, lower alkylene, or aryl or substituted aryl.R.sup.1 and R.sup.2 are H, alkyl of C.sub.1 to C.sub.8, or alkyloxy of C.sub.1 to C.sub.8 ; X.sup.- is anion; and R.sup.

Abstract: A positive type radiation-sensitive resin composition comprising an alkali-soluble novolac resin and a 1,2-quinonediazide compound, characterized in that said alkali-soluble novolac resin is a resin produced by condensing a carbonyl compound and a phenol mixture comprising 6 to 94 mole % of m-cresol and 94 to 6 mole % of at least one compound represented by the formula (I) other than m-cresol: ##STR1## wherein X is --CH.sub.3, --C.sub.2 H.sub.5, --C(CH.sub.3).sub.3, --CO.sub.2 CH.sub.3 or --CO.sub.2 C.sub.2 H.sub.5 ; n is an integer satisfying 3.gtoreq.m.gtoreq.1; and m is an integer satisfying 3.gtoreq.m.gtoreq.1, in which resin when the polystyrene-reduced molecular weight is determined by a gel permeation chromatography using a monodisperse polystyrene as the standard, maximum values a, b and c present, respectively, in the molecular weight ranges of 6,300 to 25,000, 2,500 to 6,000 and 150 to 900 in the molecular weight distribution curve obtained satisfy the following relationships: a/b=0-1.5 and c/b=1.

Abstract: The present invention relates to a two-component diazotype material comprising a support and one or several light-sensitive layers, each of which contains at least one light-sensitive diazonium salt, a coupler component and an acid stabilizer, and at least one of the layers contains a compound which absorbs light in the ultraviolet spectral region. The light-absorbing compound is present in the form of a dye salt of at least one benzothiazole which is converted into its leuco base under the action of an alkaline medium. It thus partially or completely loses its absorptivity toward radiation in the long-wave ultraviolet and short-wave visible spectral regions. The light-absorbing compound comprises a benzothiazole, in particular according to the general formula: ##STR1## wherein R.sub.1 denotes hydrogen, alkyl or aralkyl,R.sub.2 denotes hydrogen or an optionally substituted alkyl, aralkyl, aryl, pyridylalkyl, carbalkyl, carboxyalkyl, carboxyaryl, carbamoyl, or sulfamoyl radical, orR.sub.1 and R.sub.

Abstract: A photosensitive composition becoming sticky upon exposure to light which comprises (a) a salt of a diazonium compound represented by the formula ##STR1## wherein R.sub.1 and R.sub.2 are independently --H, --CH.sub.3, --OCH.sub.3 or ##STR2## but R.sub.1 and R.sub.2 cannot be ##STR3## at the same time; and R.sub.3 and R.sub.4 are independently a straight-chain lower alkyl group, and (b) a salt of an aromatic diazonium compound having no --OH group directly bonding to a benzene ring, has an improved sensitivity because it contains the salt of the compound represented by the above formula. By using said photosensitive composition, there is provided a process for forming a pattern of powder coated layer excellent in light sensitivity.

Abstract: Zinc salts of sulfonic acids are described as stabilizers for diazotype materials.

Abstract: The invention provides a photographic element having a substrate and a photosensitive coating on the substrate, said coating containing(A) the polycondensation product of 3-methoxy-4-diazodiphenyl amine sulfate and 4,4'-bis-methoxy methyldiphenyl ether, precipitated as methane sulfonate; and,(B) the polycondensation product of 3-methoxy-4-diazodiphenyl amine sulfate and 4,4'-bis-methoxy methyldiphenyl ether, precipitated as mesitylene sulfonate, and(C) at least one colorant: and(D) at least one water soluble polymeric binding resin which is preferably polyvinyl pyrrolidone. The element is developable using water alone as a solvent.

Abstract: This invention relates to 2-hydroxy-3-naphthoic acid amides of the general formula: ##STR1## wherein R.sub.1 is hydrogen, a substituted or unsubstituted alkyl, cycloalkyl, aralkyl, or aryl group, and R.sub.2 and R.sub.3 are identical or different and are hydrogen, a substituted or unsubstituted alkyl, cycloalkyl, aralkyl, or aryl group, or, together with the nitrogen atom to which they are attached, a substituted or unsubstituted heterocyclic group.

Abstract: A diazotype material useful for making duplicates of continuous tone originals, such as X-ray films, comprising a transparent film support having a coating of a layer thereon consisting essentially of at least two light-sensitive diazo compounds having different photolysis rates, couplers for the diazo compounds, an ultraviolet radiation absorbing material and homogeneously distributed in the layer at least about 7% by weight, based on the weight of lacquer, of an inert particulate material such as silica. The use of this material makes it possible to approximate a logarithmic photolysis, thereby providing sufficient linearity in the corresponding characteristic curve to achieve the desired duplicating results.

Abstract: A method of photographic trichromatic printing comprises the steps ofA. applying to the substrate a photosensitive emulsion comprising(a) a binder;(b) three types of grains of semiconductor oxides dispersed in the binder, each adapted to desorb OH.sup.- ions under the action of a primary color radiation; and either(c) a diazo system comprising a diazonium salt and three couplers each being adsorbed onto, or dispersed in the immediate vicinity of, one of said three types of grain; or(d) a diazo system comprising a coupler and three diazonium salts each being adsorbed onto, or dispersed in the immediate vicinity of, one of said three types of grain;B. exposure,C. development by heating; andD. decomposition of unreacted diazonium salts by exposure to UV light, to fix the image.An emulsion so produced and substrates carrying such an emulsion are also produced.

Abstract: This invention relates to a light-sensitive copying composition comprising a diazonium salt condensation product, a stabilizer, and a polyurethane prepolymer with free terminal isocyanate groups.