Abstract: Disclosed is a developer composition for exposed, light-sensitive, negative-working reproduction layers, which may contain an organic binder, comprising water and a salt of a substituted aromatic carboxylic acid, in particular, from about 5 to 60% by weight of at least one salt of an aromatic carboxylic acid having substituents which are immediately adjacent to the carboxyl group and represent an amino group, a hydroxyl group, and/or chlorine or bromine. Also disclosed is a process for developing the reproduction layers utilizing the disclosed developers, wherein the reproduction layer contains, in particular, a polymeric organic binder with an acetal, anhydride, amide and/or a carboxyl group.

Abstract: A presensitized lithographic plate is disclosed. The plate is comprised of a support base such as an aluminum support base having an anodized surface having a subbing layer positioned thereon which is coated with a light-sensitive layer. The light-sensitive layer is comprised of a diazo compound and a binder or comprised of a photopolymerizable composition. The subbing layer is comprised of a high molecular compound containing a sulfonic acid group-containing monomer units as recurring units. The subbing layer provides a lithographic plate which has greatly improved shelf life. The subbing layer increases the stability of the lithographic plate such that when the plate is stored it continues to be capable of producing copies which do not have stained background areas even when the plate is stored under adverse temperature and humidity conditions.

Abstract: A diazo-type thermosensitive recording material comprising a support material, a thermosensitive coloring layer formed thereon, which thermosensitive coloring layer comprises a diazonium compound layer containing a diazonium compound, and a coupler layer containing a coupler, and of the diazonium compound layer and the coupler layer, at least the lower layer near the support material further containing a thermo-fusible material and a water-insoluble binder agent, and in any portions other than the diazonium compound layer of the thermosensitive recording material, an imidazole derivative of the following formula being contained: ##STR1## wherein R.sup.1 represents a higher alkyl group, preferably with 6 to 24 carbon atoms, an alkoxyl or hydroxyalkyl group derived from the above higher alkyl group; R.sup.2, R.sup.3 and R.sup.4 independently represent hydrogen, a phenyl group, a benzyl group, an alkyl group, an alkoxyl group, an hydroxyalkyl group or a cyanoalkyl group.

Abstract: A method of preparing an anodized aluminum printing plate comprising treating the aluminum support with aqueous solution of a condensed aryl sulfonic acid having a neutral pH, anodizing the support before or after the treating step, and coat, radiation expose through a mask, as well as develop a radiation-sensitive composition to produce the lithographic printing plate.

Abstract: The present application describes a light-sensitive copying material comprising a support and a light-sensitive layer which contains a surface-active polysiloxane comprised of dialkyl siloxane units and oxyalkylene units. By the addition of the polysiloxane a more uniform coating is achieved, even if only a single solvent is used for the coating solution.

Abstract: A process is disclosed for manufacturing sheets, foils, or strips which involves chemically, mechanically, and/or electrochemically roughening and anodically oxidizing aluminum or aluminum alloy surfaces, followed by two post-treatment steps. In the first step, the metal surface is treated with an aqueous alkali metal silicate solution; thereafter, the surface is treated with an aqueous solution comprising alkaline earth metal ions. The materials produced according to this process are particularly used as supports for offset-printing plates.

Abstract: A thermo-developable type diazo copying material including a substrate and a heat sensitive recording layer, superposed on said substrate, which consists essentially of a diazo compound, a coupler and a heat-fusible color assistant, characterized in that said heat sensitive recording layer is of the multilayered type comprising a diazo compound-containing layer and a coupler-containing layer, and said coupler is composed of one or two or more of the compounds having the following general formula: ##STR1## wherein X is hydrogen, halogen, an alkyl group having 1-4 carbon atoms or an alkoxyl group having 1-4 carbon atoms; R.sup.1 is an alkyl group having 10-25 carbon atoms; and R.sup.2 is hydrogen or an alkyl group having 1-30 carbon atoms.

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: The plate-, foil- or strip-shape support materials for offset printing plates are based on chemically, mechanically and/or electromechanically roughened aluminum, or on one of its alloys. Optionally, the aluminum may also have an aluminum oxide layer produced by anodic oxidation. One of the two surfaces the support material has a hydrophilic coating of at least one salt-type hydrophilic organic polymer which is a complex-type product obtained by reacting (a) a water-soluble organic polymer having acid functional groups containing phosphorus or sulfur (for example, polyvinylphosphonic or polyvinylsulfonic acid) with (b) a salt of an at least divalent metal cation.In a process for manufacturing this support material, the complex-type reaction product, dissolved in an aqueous acid, is applied to at least one surface of the support material and the support material thus modified is dried.

Abstract: A one-component or binary type diazo copying element comprises a substrate, a pre-coat layer overlying the substrate, said pre-coat layer being consisted essentially of fine particle silica and a specific copolymer having a glass transition temperature in the range of -20.degree. C. to 50.degree. C., and a diazo photosensitive layer overlying the pre-coat layer.

Abstract: Light sensitive compounds are deposited onto a hydrophilized metal substrate, which is preferably aluminum, by means of a direct current electromotive force. The light sensitive component is dissolved in a current carrying solvent. Cathodic, hydrophilized, aluminum is passed through the solution and the EMF applied. The result is a light sensitive coating on the hydrophilized substrate surface.

Abstract: A thermo-developable type diazo copying material is disclosed comprising a substrate and a photosensitive layer, formed thereon, consisting essentially of a diazo compound, a coupler and a color assistant, wherein said color assistant is at least a member selected from the group consisting of fatty acid amides having the general formula I:R.sup.1 CONH.sub.2(wherein, R.sup.1 is a saturated or unsaturated aliphatic hydrocarbon group having 5 to 24 carbon atoms), N-substituted fatty acid amides having the general formula II:R.sup.1 CONHR.sup.2(wherein, R.sup.1 is the same as defined above and R.sup.2 is an alkyl group having 1 to 5 carbon atoms, substituted or non-substituted phenyl group or substituted or non-substituted cyclohexyl group) and N-substituted fatty acid amides having the general formula III:R.sup.1 NHCOR.sup.2(wherein, R.sup.1 and R.sup.

Abstract: A process for forming an image is disclosed wherein a photosensitive image-forming material comprising a diazonium compound or an azide compound is exposed and developed by a peeling development method wherein a development carrier sheet having thereon a layer of an adhesive composition is adhered to the image-forming material, before or after exposure, and, after exposure, peeled from the image-forming material whereby the exposed areas of the photosensitive layer are adhered to the carrier sheet thereby forming a relief image, and the unexposed areas remaining adhered to the support also forming a relief image.

Abstract: An aluminum substrate is electrochemically or thermally deposited with a ceramic surface coating comprising an organic acid, such as polyvinyl phosphonic acid, and an alkaline earth silicate or borate.

Abstract: A presensitized dry planographic printing plate comprising a base layer, a photo-sensitive layer and a silicone rubber layer, characterized in that the photo-sensitive layer contains an effective amount of an organic acid.

Abstract: A long running printing press can be obtained by use of a photopolymerizable composition comprised of an ethylenically unsaturated oligomer, a solvent soluble diazonium resin, an organic film forming binder, and a photoinitiator system in described ratios.

Abstract: A photo-sensitive and heat-sensitive composition consisting essentially of a leuco-pigment; a hydrogen donator; a photo-reductant which, when exposed to a visible light, produces a reducing agent by the action of said hydrogen donator coexisting therewith; a photooxidant which, when exposed to an ultraviolet ray, causes said leuco-pigment coexisting therewith to generate color and simultaneously, when reacted with said reducing agent, is deprived of its own oxidizing ability; and a cobalt complex which reacts with the reducing agent in amplifying manner to thereby suppress the reaction of a color-forming system, and a recording element using the same.

Abstract: A peel-apart-developable light-sensitive material comprising a light-sensitive element (a) comprising (i) a first support having coated thereon (ii) a thin layer and (iii) a light-sensitive composition layer in this order, in combination with an adhesive element (b) comprising (i) a second support having coated thereon (ii) an adhesive composition layer, wherein the thin layer (ii) has a different composition from the composition of the light-sensitive layer (iii) and having the capability that, where the light-sensitive composition layer (iii) is imagewise exposed to actinic radiation and then one of the first support (i) or the second support (i) is peeled from the combination of the light-sensitive element (a) and the adhesive element (b) laminated together in which the light-sensitive composition layer (iii) is adjacent the adhesive composition layer (ii), all of or a portion of the thin layer (ii) is peeled off with the second support (i), the adhesive composition layer (ii) and the light-sensitive compo

Abstract: Diazonium compounds particularly useful for the preparation of lithographic printing plates, a process for the preparation of this compound and printing plate, and for the use of the plate; and a lithographic plate presensitized with this compound, are described.

Abstract: A base plate adapted to be coated with a light-sensitive diazo resin, and a lithographic plate which may be prepared therefrom. The base plate includes a substrate comprising a metal support and having a water-wettable, hydrophilic surface. Over the substrate and in direct contact with the surface is a layer comprising an oleophilic ink-receptive organic resin adapted to receive a light-sensitive coating comprising a diazo resin sensitizer. The oleophilic resin layer is permeable to the sensitizer so that it may penetrate substantially through the resin layer to establish sufficient contiguity between the diazo resin and the substrate so that both the light-sensitive coating and the organic resin layer become anchored to the substrate in the areas of exposure when the light-sensitive coating is exposed to light. Methods of preparing the base plate and lithographic plate are also disclosed.

Abstract: A base plate adapted to be coated with a light-sensitive diazo resin, and a lithographic plate which may be prepared therefrom. The base plate includes a substrate comprising a metal support and having a water-wettable, hydrophilic surface. Over the substrate and in direct contact with the surface is a layer comprising an oleophilic ink-receptive organic resin adapted to receive a light-sensitive coating comprising a diazo resin sensitizer. The oleophilic resin layer is permeable to the sensitizer so that it may penetrate substantially through the resin layer to establish sufficient contiguity between the diazo resin and the substrate so that both the light-sensitive coating and the organic resin layer become anchored to the substrate in the areas of exposure when the light-sensitive coating is exposed to light. Methods of preparing the base plate and lithographic plate are also disclosed.

Abstract: A photosensitive image forming material which comprises a transparent support having thereon, in order, a poly(vinyl alcohol) layer, an alcohol soluble polyamide layer and a photosensitive resin composition layer with at least one of the poly(vinyl alcohol) layer and the photosensitive resin composition layer containing a colorant therein; and an image forming method using the image-forming material. Such a layer structure ensures sufficiently layer good adhesion as well as strippability of the developed image on demand.

Abstract: A table has a mechanically driven draw bar squeegee mounted thereon to spread ink and other substances in a uniform manner. There is an interchangeable plurality of such squeegees which may be sequentially placed in said table to enable successive layers of different types of materials to be spread, in sequence, over the surface of a paper. This succession of materials includes an isolation layer between successive colors of ink, whereby a mistake on work in progress does not necessarily lead to a final destruction of all previously done work. A feature of the invention is that the pigmented surface of dried ink is not seen through the tint of other material, such as photoresist, for example. Also, a releasable layer may be provided among the successive layers so that a hand proof copy may be transferred, as a decalcomania.

Abstract: Thermal diazotype sheets having substituted imidazoline acid-neutralizers are shown to have shelf stability and short development times.

Abstract: A stabilizer, applied either as a coating over the sub-base layer of a presensitized planographic plate or blended into the sensitizer layer thereof, prevents degradation of the sensitizer enabling such plates to be stored over prolonged periods of time without loss of image quality or printing performance. The stabilizer is an aryl sulfonic acid or derivative thereof and, preferably, a haloaryl sulfonic acid or alkali metal salt thereof. In a particularly preferred presensitized plate, a p-chlorobenzene sulfonic acid coating is directly applied to a silicated anodized aluminum plate base and forms a separate layer interposed between the silicate sub-base and a water soluble diazo resin sensitizer layer.

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.