Abstract: Disclosed are-(2?-Hydroxy-4?-aminophenyl)benzotriazole derivatives of formula wherein R1 and R4 independently of each other are hydrogen; C1-C28alkyl; C1-C28alkoxy; C2-C28alkenyl; C2-C28alkinyl; C3-C12cycloalkyl; C3-C12cycloalkenyl; C7-C28aralkyl; C1-C20heteroalkyl; C3-C12cycloheteroalkyl; or C5-C16 heteroaralkyl; and wherein C1-C28alkyl, C1-C28alkoxy, C2-C28alkenyl and C2-C28alkinyl are unsubstituted or may be substituted by at least one C1-C5alkyl, C1-C5alkoxy or hydroxy; R2 and R3 independently of each other are hydrogen; C1-C28alkyl; C2-C28 alkenyl; C2-C22alkinyl; C3-C12cycloalkyl; C3-C12cycloalkenyl; C7-C28 aralkyl; C1-C20 heteroalkyl; C3-C12cycloheteroalkyl; C5-C16heteroaralkyl; and wherein C1-C28alkyl, C1-C28alkoxy, C2-C28alkenyl and C2-C28alkinyl are unsubstituted or may be substituted by at least one C1-C5alkyl, C1-C5alkoxy or hydroxy; or CO—R5; or R2 and R3 together with the linking nitrogen form a 5- to 7-membered, monocyclic, carbocyclic or heterocyclic ring; R5 is C1-C28alkyl; C2-C28alkenyl;

Abstract: A method of producing a three-dimensional object having selected elements which are colored differently than other elements of the object comprising the steps of:(a) providing a film of a photohardenable composition containing a photoresponsive agent,(b) radiating the film in a cross-sectional pattern of the object to be formed,(c) selectively irradiating one or more portions of the cross-sectional pattern corresponding to the selected elements which are desired to be colored differently with radiation which activates the photoresponsive agent, the photoresponsive agent thereby producing color in or removing color from the selected irradiated portions of the cross-sectional pattern,(d) repeating steps a, b, and c to form successive adjacent cross-sectional pattern of the object, and(e) integrating the cross-sectional patterns together to provide the three-dimensional object, wherein the curing and coloring steps are conducted using actinic radiation.

Abstract: A blueprint developing solution and process for developing blueprints, wherein the ammonia odor in the blueprints is reduced without eliminating the odor of the developing solution, comprising the incorporation of an effective amount of sodium chlorite in the developing solution or the addition of the vapor products of an aqueous sodium chlorite solution to the developing chamber of a blueprint developing machine.

Abstract: A light sensitive reprographic paper which is protected against deterioration caused by rough handling. The paper comprises a paper base having first and second surfaces, and a coating on the first surface comprising a light sensitive diazo-containing composition which develops by reaction with ammonia gas. The paper is adapted for development by exposure of one of the first and second surfaces to ammonia gas. A substantially transparent, flexible, polymeric sheet is permanently laminated to the paper surface which is not to be exposed to the gas.

Abstract: A method for automatically determining the quantity of a soluble component in a powdery product is disclosed comprising providing a sample receiving container, weighing the sample receiving container, computing the weight of a predetermined quantity of solvent for the soluble component and introducing that predetermined quantity of solvent to the sample receiving container, introducing a predetermined quantity of the powdery product into the sample receiving container including the computed weight of solvent, weighing the solvent containing container with the predetermined quantity of powdery product and solvent therein, computing the weight of the predetermined quantity of powdery product, computing the weight ratio of the predetermined quantity of powdery product to the predetermined quantity of solvent, agitating the predetermined quantity of powdery product and solvent within the sample receiving container so as to create a solution thereof, determining an electrical characteristic of the solution, and co

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 water-soluble, positive-working photoresist composition is disclosed which comprises water-soluble aromatic diazonium salt, water-soluble phenolic compound, and water-soluble polymeric compound. When the film of this composition is irradiated with a pattern of actinic ray and then brought into contact with an alkaline gas or solution, the coating of unexposed areas hardens to become water-insoluble. Preferably, when the film is brought into contact with a suspension of powder or dry powder after being hardened, a positive pattern of powder is obtained by the development with water.

Abstract: An aqueous diazo coating composition is disclosed to be used in accordance with an alkaline vapor development system, containing a hydrolyzed resin together with a diazo light-sensitive compound, coupling agent and stabilizing materials. The aqueous diazo coating composition of the present invention provides a method of fabricating a light-sensitive diazo member for use in combination with a development system utilizing alkaline vapors which excludes the use of organic solvents.

Abstract: This invention relates to a derivative of 2-hydroxy-naphthalene of the general formula ##STR1## wherein A is ##STR2## and X is --OH or ##STR3## and R.sub.1, R.sub.2, R.sub.3, and R.sub.4 are identical or different and are hydrogen, cycloalkyl having up to eight carbon atoms, which is optionally substituted by lower alkyl groups, aralkyl having up to 10 carbon atoms or aryl which is substituted by lower alkyl, lower alkoxy, halogenalkyl or alkyl-substituted amino groups or by halogen, or R.sub.1 and R.sub.2 or R.sub.3 and R.sub.4 in each case are, conjointly with the nitrogen atom to which they are attached, identical or different heterocyclic groups which are optionally substituted by lower alkyl.

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

Abstract: Diazotype material having enhanced water-wet properties and especially suitable when imaged for being drawn or written upon, and for use as an intermediate original, is made of a support such as a transparent polymeric film carrying on one of its sides a light sensitive diazo layer formed of a dispersion of a light sensitive diazonium compound and a large amount of amorphous hydrated silica particles having a bound water content of at least 50% by weight in a polymeric binder consisting essentially of a 20 to 45% hydrolyzed polyvinyl acetate which preferably is a product of partial hydrolysis of a PVAC having in ethyl acetate at 20.degree. C. a Heoppler viscosity of 100 to 800 mPa.s. The weight ratio of the hydrated silica to the partially hydrated PVAC in the layer typically is in the range of 2:3 to 3:2. The support advantageously carries on its other side a light-pervious drafting layer formed of a dispersion of a silica filler in a partially hydrolyzed PVAC the same as that required for the diazo layer.

Abstract: A method is disclosed for preparing an oleophilic drafting film and related light-sensitive reprographic member. An aqueous drafting composition is disclosed which is both compatible with hydrophobic material and diazo light-sensitive compositions which provides for an expedient method of fabricating drafting film. The drafting composition comprises an acrylic resin emulsion containing an aziridine hardening agent.

Abstract: Phenylurethane compounds formed by the reaction between a phenolic coupler compound and an organic isocyanate compound are utilized to form phenolic coupler compounds in situ in order to react with chromogenic compounds present in the sensitive layer of recording or reproducing materials.The phenolic coupler compounds can also be stabilized by blocking the phenolic hydroxyl with carbonate, an alkyl ether, organosilylated ether or organophosphoric acid ester, some of which are novel compounds. These stabilized derivatives of the stabilized phenolic coupler compound will decompose by application to sufficient thermal energy or suitable liquid or gaseous fluid to form the phenolic coupler compound in situ. The phenolic coupler compound is formed in situ by applying thermal energy to the sensitive layer or by applying to the sensitive layer a liquid or gaseous fluid which is able to decompose the stabilized phenolic coupler compound and release the phenolic coupler compound.

Abstract: Disclosure is made of a light-sensitive diazo coating composition and a light-sensitive diazotype reproduction material comprising a base with at least one coating layer comprising a light sensitive diazo compound, coupling component, a stabilizing acid and salt, and a development accelerating and stabilizing composition of 1,3-dimethylurea with urea or with thiourea, which also improves sensitizing solution compatibility and increases printing speed.

Abstract: It is the purpose and object of the present invention to make better use of the emission range of light sources and to create the diazonium salts necessary for such purpose. The diazonium salts of the present invention of the general formula ##STR1## wherein Y is ##STR2## R.sub.1, R.sub.2 are equal or different and are, alkyl having 1 to 10 carbon atoms, aryl having 6 to 10 carbon atoms in a mono or polycylic ring;R.sub.3 is hydrogen, halogen, alkyl, alkoxy, cyano;R.sub.4 is hydrogen, halogen, alkyl, alkoxy; andX.sup.e is an anion,can be employed with all known couplers and additives in diazotype materials. They have an absorption range of 480 to 550 nm.

Abstract: A self-contained disposable package including a container of diazo copy developer liquid and an ammonia vapor absorber canister is disclosed for use with diazo type copy machines. The container of developer liquid and an absorber canister are adapted to be readily hooked into the supply and exhaust lines of the copy machine developer chamber and to the exhaust line of a machine degassing chamber. The absorber canister includes a quantity of ammonia vapor absorber material such as a mixture of excelsior and activated carbon, both treated with phosphoric acid, into which is extended a flow tube adapted to be connected to the degassing exhaust chamber with the exhaust flow directed to emanate from the lower region of the canister and flow upwardly through the absorber material and thence out through openings in a top cap. The quantity of developer and absorber is correlated such that the entire package may be replaced as soon as the developer liquid becomes exhausted.

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: Disclosed is a process for developing a two-component diazocopying material, comprising the steps of providing a film of an ammonia-steam mixture or of an aqueous ammonia solution, respectively, flowing uniformly into the interior of an evaporation zone and being uniformly heated at the same time to release a developing gas in the evaporation zone; providing a liquid developing solution in a sump zone; evaporating a portion of the developing solution to produce a developing gas in the evaporation zone located above the sump zone, passing the diazocopying material through a developing zone; introducing the developing gas from the evaporation zone into the developing zone and contacting the diazocopying material with the developing gas in the developing zone; maintaining the temperature in the developing zone at a level higher than the temperature at which the developing gas enters from the evaporation zone; and maintaining the temperature in the sump zone at a level higher than the temperature in the evaporati

Abstract: A diazo microfilm which is resistant to fading upon exposure to strong light for extended periods of time is provided. The fade-resistant diazo microfilm is produced by saponifying a cellulose alkanoate film to an extent defined by certain infrared absorption parameters.

Abstract: A photosensitive material and a process for developing the same are disclosed.The photosensitive material is obtained by forming on a base material a layer of photosensitive composition comprising (A), 100 weight parts of a water soluble resin binder containing at least 60 weight % of acrylamide-diacetoneacrylamide copolymer, the copolymerization ratio of acrylamide and diacetoneacrylamide being 8:2-5:5 and average polymerization degree being 300-1500, and (B), 5-20 weight parts of a water soluble diazonium salt.The photosensitive material is developed by using an aqueous alkali solution.

Abstract: The invention relates to an improvement in diazocopy development machines. A development chamber is used in which ammonia vapors are generated. A converging system made up of converging walls which accelerate the hot ammonia vapors, without additional means, channels the vapors toward the copy support. Thus, a striking is made of the support with the vapors and the development speed can be significantly increased.

Abstract: Negative-working diazography material is comprised of (i) at least one diazonium compound, (ii) at least one acid labile enolic, preferably phenolic blocked-coupler adapted to be converted in the presence of acid to an active azo-coupling component, (iii) at least one light-sensitive acid progenitor, and (iv) at least one carboxylic acid anhydride. The diazonium compound can itself concurrently function as the acid progenitor, e.g., when complexed with a Lewis acid. Upon imagewise exposure to light, acid catalyst is photochemically liberated, thus unblocking coupler molecules such that dye image forms under alkaline developing conditions only where the material has been irradiated. Under alkaline developing conditions, the anhydride reacts to render the unused diazo component remaining in the unexposed areas inactive.

Abstract: Diazotype developing apparatus and method in which a gaseous developing medium, such as a mixture of ammonia and air of predetermined concentration, is contained within a containing system, which includes the developing chamber of the apparatus, and the volume of the containing system is variable with only negligible changes in the pressure within the containing system so as to allow the volume of gaseous developing medium to be maintained within the containing system at essentially the same pressure as the pressure of the surrounding ambient atmosphere during variations in the volume of gaseous developing medium within the containing system resulting from operation of the apparatus.

Abstract: A method and apparatus for producing a highly readable diazo copy from a blue line original. An illumination source provides actinic energy which is substantially absorbed by the blue image of a diazo blue line print and in which no substantial exposure of the diazo paper can occur from energy which is non-responsive to the blue image. The light source produces major energy in the range of about 4600 to 5900 Angstroms. A filter or other means is provided to remove any spurious wavelengths which are non-responsive to the blue image and which can expose the diazo paper.

Abstract: This invention relates to an improvement in a two-component diazotype material, composed of a support and of a light-sensitive layer applied to the support, the layer containing at least one benzene diazonium salt as the light-sensitive component and at least one coupler, the improvement comprising the combination of at least one 2,5-dialkoxy-4-mercaptobenzene diazonium salt and at least one compound of the general formula ##STR1## in which R.sub.1 and R.sub.2 are identical or different and denote hydrogen or alkyl, alkenyl, aralkyl, aryl or cycloalkyl groups, which can be further substituted.

Abstract: A processor for developing diazo film has flat platens disposed within a housing and spaced apart a distance to accommodate the thickness of the film. The housing includes an inlet and an outlet aligned with the space between the platens and means for advancing a film from the inlet and through the space between the platens in a preheat chamber and in a developing chamber and for discharging the developed film. The platen facing the emulsion side of the film is heated in the preheat chamber so that the film is heated to a desired temperature prior to developing. A metered amount of aqueous ammonia is supplied through a lower chamber at the inlet end of the developing chamber wherein the ammonia is separated from the water by reason of the differential temperature and ammonia vapor rises to contact the emulsion side of the film for rapidly developing thereof and the water is drained from the lower chamber.