Abstract: The lithographic printing plate of the invention comprises a substrate having a hydrophilic surface, a coating on said surface of a light sensitive material (e.g., a water soluble diazo) and a top coating of discrete, oleophilic resin particles (e.g., an emulsion polymer), the resin particle coating being:(a) transparent to actinic light;(b) sufficiently permeable to allow a developer for the light sensitive material to penetrate through to the underlying light sensitive coating;(c) insoluble in said developer;(d) capable of being coalesced in situ after the plate is imaged and developed.

Abstract: This invention relates to an improved overlay proofing film. More, particularly, the invention relates to an improved overlay proofing film comprising a substantially transparent polyester base film which has deposed thereon a substantially uniform adhesive layer comprising aluminum oxide, which adhesive layer has deposed thereon a substantially uniform optical layer comprising magnesium fluoride, said polyester base film being coated on either side with a light sensitive mixture ofa. a resinous binder;b. a colorant; andc. a light sensitive material.

Abstract: This invention is directed to the reaction product of an O-epoxyalkylated tetrakis (hydroxyphenyl) alkane resin with a phenol, which is used either as an upper layer over a lower layer of a diazo resin in a bi-layer system or as a homogeneous mixture with a diazo resin in a mono-layer system to provide a water-developable, negative-working, lithographic printing plate.

Abstract: A negative-working, water-developable, bilayer lithographic printing plate comprising a substrate having a hydrophilic surface which surface is first coated with a layer of a water-soluble, lithographically suitable, photosensitive, negative-working aromatic diazo composition and top coated with a layer of a water-permeable, water-insoluble, oleophilic, O-epoxyalkylated tetrakis (hydroxyphenyl) ethane resin and ester derivatives thereof. Upon imagewise exposure, the exposed areas become water insoluble, and development is effected by washing away the unexposed areas with water.

Abstract: A radiation sensitive compound contains at least two groups having the structure ##STR1## in which Ar represents a divalent or other polyvalent radical derived from an aromatic or heteroaromatic compound; X and X' which may be the same or different, each represents O, S or an imino group, provided that at least one of X and X' is an imino group; Y represents O or S; R represents a single bond or a divalent or other polyvalent radical and A.sup.- is an anion. Radiation sensitive compositions comprising the compound and optionally a resin may be used to produce radiation sensitive plates for lithographic printing plate production.

Abstract: A method for exposing a layer of photoresist on a sheet includes positioning the sheet in a vacuum printing frame comprising a glass plate carrying an opaque master pattern of metal or metal oxide. With the pattern opposite the coating, the frame is evacuated and the layer is exposed. The pattern has a substantially-uniform thickness in the range of about 0.5.+-.0.2 micrometer. To reduce the times for evacuating and devacuating the frame, the pattern side of the glass plate carries an array of light-transparent islands up to about 3.0-micrometer thick. An overcoating of wax on the islands is a further aid.

Abstract: A photosensitive lithographic plate comprising a hydrophilic substrate, a photosensitive diazo resin layer superposed on the substrate, and a layer of a photosensitive polyvinyl acetal resin containing an aromatic azide group in a side chain thereof and having an acid number of 10 to 100 and superposed on the diazo resin layer, and a method for the manufacture of this photosensitive lithographic plate.

Abstract: The invention relates to new diazotype materials of which the sensitive layer contains, as a base generator, a compound comprising a basic part and an acid part, the acid part being a 2-carboxycarboxamide group and the basic part consisting of an alkali metal cation or alkaline earth metal cation or a tetraalkylammonium cation.These diazotype materials develop rapidly and possess an excellent resistance to ageing.

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 light-sensitive printing plate is disclosed. The printing plate is comprised of a support base having a light-sensitive layer positioned thereon and a matting layer comprised of a micropattern of protuberances. The protuberances are present in a regular or randomly mixed manner on the light-sensitive layer and are comprised of a copolymer. The copolymer includes a monomer (unit a) with a sulfonic acid group, a monomer (unit b) selected from the group consisting of alkyl acrylates having 1 to 10 carbon atoms in the alkyl moiety thereof and alkyl methacrylates having 4 to 10 carbon atoms in the alkyl moiety thereof and a monomer (unit c) copolymerizable with monomer (unit a) and monomer (unit b), monomer (unit c) as a copolymer having a glass transition point of 60.degree. C. or above. The matting layer does not cause staining of a film original when superposed thereon and is resistant to rubbing or pressure and provides a surface which can be vacuum contacted with a film in a short period of time.

Abstract: Disclosed is a drafting material comprising a plastic support having on at least one surface thereof an adhesive layer, a layer of pigmented or clear lacquer and a top layer which includes a homo- or copolymer of vinyl acetate and an antistatic agent, wherein the antistatic agent contained in the top layer is a polyamino/polyamide resin modified with an epihalohydrin, preferably epichlorohydrin, the resin being a condensation product of at least one aliphatic dicarboxylic acid or polymeric carboxylic acid and at least one polyamine.

Abstract: This invention relates to a light-sensitive laminate comprising a light-sensitive layer of photoresist, a support therefor, and an intermediate protective layer preferably of a light-transmitting material disposed between said photoresist layer and said support. In use, the photoresist layer of the laminate is adhered to a base material and the support stripped therefrom, thereby leaving a composite comprising the base material, photoresist layer and intermediate protective layer disposed over said photoresist layer. The intermediate layer serves to protect the photoresist layer from damage such as by abrasion or otherwise during processing, thereby permitting storage of the so-formed composite prior to use. Since the intermediate layer may be of a light-transmitting material, photo-imaging may take place through the intermediate layer with the intermediate layer subsequently removed by contact with a solvent that is a non-solvent for those areas of photoresist left after development.

Abstract: Photo-fixing heat-sensitive recording media which comprise diazonium salts, couplers and/or basic materials, all of these components being insoluble or sparingly soluble in water. At least one of these components is present in the media in the form of a fine powder. The coupler may be a coupler which has a basic group therein and serves as both a coupler and a basic material.

Abstract: An image-forming laminate is formed by the combination of a thin, frangible light opaque material on top of a photosensitive layer which changes its surfactant properties when irradiated. The photosensitive layer according to the present invention comprises a film-forming polymeric binder, a photosensitive acid generator, and a surfactant selected from nonionic surfactants, the neutral form of cationic surfactants, amphoteric surfactants, and surfactant acid salts. Preferably the frangible light opaque material is a thin metal layer. There can also be present a support layer on the other surface of the photosensitive layer, as well as there can be an adhesive layer secured to the upper surface of the frangible light opaque material. The strength of adherence of the adhesive layer to the metal should be intermediate the strength of the adherence of the light opaque material prior to and after photoactivation.

Abstract: A photosensitive plate suitable for preparation of a waterless lithographic printing plate, which comprises a support material and a photosensitive layer provided thereon, said photosensitive layer being made of a photosensitive composition comprising an emulsion polymerization product of an acrylic or methacrylic monomer having a perfluoroalkyl group in the side chain and a water-soluble photosensitive substance resin whose water-solubility is variable by irradiation of ultraviolet rays.

Abstract: The lithographic printing plate of the invention comprises a substrate having a hydrophilic surface, a coating on said surface of a light sensitive material (e.g., a water soluble diazo) and a top coating of discrete, oleophilic resin particles (e.g., an emulsion polymer), the resin particle coating being:(a) transparent to actinic light;(b) sufficiently permeable to allow a developer for the light sensitive material to penetrate through to the underlying light sensitive coating;(c) insoluble in said developer;(d) capable of being coalesced in situ after the plate is imaged and developed.

Abstract: A thermal development type diazo copying material comprising a support material and a photosensitive layer formed on the support material, which photosensitive layer comprises a diazo compound, a coupling component and a thermo-fusible auxiliary coloring agent, and which coupling component is capsulated by a hydrophobic polymeric material with a softening point ranging from 50.degree. C. to 150.degree. C. selected from the group consisting of hydrophobic polyester resins, hydrophobic cellulose resins, hydrophobic polyamide resins and hydrophobic polyurethane resins.

Abstract: A diazotype heat development recording medium of the present invention has excellent shelf life and heat sensitivity. The medium comprises a support and a recording layer which is formed on said support and which comprises a diazo compound, a coupler, an acid stabilizer, a thermal developer, and a polymeric binder. The thermal developer is a salt of an organic or inorganic acid having a primary dissociation constant of 2.times.10.sup.-1 to 1.times.10.sup.-4 and an alkyl-substituted guanidine represented by the general formula: ##STR1## (wherein at least one of R1 and R2 is an alkyl group of C.sub.8 to C.sub.24, and the other of R1 and R2 is a hydrogen atom or an alkyl group of C.sub.1 or more).

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: The invention concerns a heat, steam or water developing diazotype material, containing a photosensitive diazonium salt stabilized with a non-diffusing acid and also one or several developing coats--which could contain the coupling agent--located on the front or back side of the used base material, products avoiding the interpenetration of the active agents, preventing the washing of one coat through the another during coating process, slowing down the absorption of ambient humidity at normal temperature, absorbing the volatile alkaline products at normal temperature, separating the essential reagents to avoid their spontaneous reaction, releasing an accelerating plasticizer during the development, reducing the activation temperature, improving the development by formation of an insoluble salt with the stabilizing acid, releasing a non-volatile weak acid in case of an attack by moisture.

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: A fixable thermosensitive recording sheet with excellent shelf life and high developed color density is obtained by using a hydrophobic guanidine derivative as heat-fusible developer in a thermosensitive recording sheet consisting of a substrate, a photo- and thermo-sensitive layer made from a diazonium salt and formed on said substrate, and a developer layer overlying said photo- and thermo-sensitive layer and made from a heat-fusible developer, with a coupler compound contained in at least one of said two layers.

Abstract: A tamperproof identification card such as a passport or credit card is provided. A diazo photosensitive composition is intimately mixed with a thermo-adhesive resin and is carefully deposited as a uniformly thin layer in one or more zones on a plastic support material. The zones of the photosensitive compositions are developed to reproduce identifying information such as a photograph, identification number, etc. A plastic protective film is then laminated to the support to protect the identifying information. Since the adhesive resin material is intimately mixed throughout the photosensitive composition, the protective plastic film cannot be removed without destroying the information.

Abstract: This invention relates to novel photosensitized sheet constructions which, upon exposure to an energy source through a screened image, can accurately and simultaneously reproduce said image in both its negative and positive forms.

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: One component diazotype material is imagewise exposed and developed odorless and curlfree with 0.6-4.5 g/m.sup.2 per square meter of a substantially water free liquid developer in a pressure development or transfer roller apparatus.

Abstract: Presensitized lithographic plates having a diazo layer are prepared such that they exhibit a photospeed rendering them suitable for ultra high speed operations including use within laser platemaking systems. These ultra high speed plates have a diazo layer that is exceedingly thin while still being generally uniformly distributed throughout the plate area. The process includes extracting a significant quantity of diazonium compound or diazonium resin from a diazo layer on a presensitized plate substrate. Plates thus formed are useful in laser exposures for facsimile transmissions, as projection plates, as camera back plates, for step and repeat plate work, and where low intensity light sources are used in conjunction with very large plates.

Abstract: A process for forming an image is disclosed wherein a photo-sensitive material composed of a support and a layer of a photo-sensitive composition containing a diazonium compound, an o-quinonediazide compound or an aromatic azide is exposed and developed by heating in intimate contact with a peeling development carrier sheet, and subsequently, peeling the carrier sheet from the photo-sensitive material.

Abstract: This invention relates to a recording material containing diazo compounds, in particular a microfilm, comprising a film base which is at least partially pervious to visible radiation, a light-sensitive layer and, on the reverse side of the film base, a filter layer which absorbs light in the long-wave ultraviolet spectral range and in the short-wave visible spectral range, wherein the filter layer is composed of a polymer which is insoluble or has been rendered insoluble by cross-linking, and of at least one yellow to orange-colored dye which is compatible with the constituents of the polymer and absorbs light in the range between about 360 nm and about 500 nm. The invention also relates to a process for the manufacture of a recording material.

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 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 method of increasing the strength, abrasion resistance, solvent resistance, and press life of a lithographic image comprising a layer of light-reacted light sensitive material and an outer layer comprising an epoxy resin overlying the light-reacted layer. In the method, the surface of the outer layer is contacted and wetted with an aqueous solution comprising a least about 7% by weight of a boron trifluoride-amine complex. Solvent is evaporated from the solution on the surface to deposit dry boron trifluoride-amine complex on the outer layer and the outer layer is heated in the presence of the complex to cross-link the epoxy resin and form a hard, tough, abrasion-resistant, solvent-resistant and wear-resistant epoxy resin layer at the outside of the image. Further included in the invention are a curing composition adapted for topical application to a lithographic image in carrying out the method of the invention and a planographic printing plate produced thereby.

Abstract: A metal image-forming material comprising a base, a photosensitive resin layer formed thereon, and a layer of an aluminum/iron alloy formed between the base and the resin layer. The aluminum/iron alloy layer has superior etchability, and the image-forming material affords images having high contrast and resolving power. The image-forming material is especially suitable for linework and dot etching.

Abstract: There is provided a process for preparing a photosensitive plate for printing which comprises providing a heat-depositable fine powder having a constant directional size of 0.5-40.mu. onto the surface of a photosensitive plate for printing at a ratio of 0.005-0.5 g. of the said powder per m.sup.2 of the said plate to uniformly disperse and adhere the said powder onto the said surface, while preheating the right side (side on which powder adheres) and/or the reverse side of the said plate upon providing said powder or before or after providing, and subsequently contacting the right side of the said plate with a heating roll having a high releasing surface, whereby the said fine powder is fused and fixed on onto the surface of the said plate.

Abstract: There is provided a process for the production of a photosensitive plate for printing which comprises providing a given amount of a fine powder having a constant directional size of 0.5-40 .mu. from a dust supplier directly or via a distributor to a cyclone, feeding the said powder together with a small volume of air from the bottom of said cyclone, uniformly dispersing and adhering the so flowed fine powder onto the surface of a continuously running photosensitive plate for printing.

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: In a photothermographic element comprising (A) at least one photosensitive layer comprising a photosensitive component, such as photosensitive silver halide or a diazotype photosensitive material, (B) at least one layer comprising a processing agent for the photosensitive component and (C) a separation polymer between (A) and (B), increased preexposure storage stability is provided by a polysulfonamide as separation polymer (C). After imagewise exposure of the photothermographic element, an image can be developed by merely heating the element to moderately elevated temperatures.

Abstract: A process of preparing magnetic recording elements containing substantially transparent magnetic recording layer which exhibit excellent magnetic and reproducing characteristics is as follows:(a.) forming a substantially homogeneous dispersion of acicular magnetizable particles in a medium comprising a solution of substantially transparent binder in solvent using particles having an average width of less than about 0.06 micron and an average length up to about 1 micron; the concentration of the binder being at least about 10 parts per 100 parts, by weight, of the particles; up to about 30 parts, by weight, for particles having an average length of at least about 0.06 micron and up to about 40 parts, by weight, for particles having an average length of less than about 0.06 micron,(b.) coating a support with the dispersion in an amount sufficient to provide a final dry layer thickness up to about 5 microns,(c.) removing substantially all solvent from the layer and(d.

Abstract: A light-sensitive printing plate having a matt layer, which is removable at development, on the surface thereof.

Abstract: Presensitized lithographic plates having a diazo layer are prepared such that they exhibit a photospeed rendering them suitable for ultra high speed operations including use within laser platemaking systems. These ultra high speed plates have a diazo layer that is exceedingly thin while still being generally uniformly distributed throughout the plate area. The process includes extracting a significant quantity of diazonuim compound or diazonium resin from a diazo layer on a presensitized plate substrate. Plates thus formed are useful in laser exposures for facsimile transmissions, as projection plates, as camera back plates, for step and repeat plate work, and where low intensity light sources are used in conjuction with very large plates.

Abstract: Pre-press or photomechanical color proofs of half-tone printed products do not faithfully match the color tone values of the final half-tone printed product. This problem occurs from the fact that the printing press, in its mechanical operation, produces half-tone dots on the substrate which are larger than the dots on the printing plate or separation negative itself. It has been found that the proper tonal values for gauging the final results from the press can be obtained in the pre-press color proof by the insertion of a spacer layer between the opaque base and the applied pigment or dye containing layers.

Abstract: An image recording material formed with a support, a photosensitive composition layer formed on the support, and a mono-particle layer of solid particles of different optical transmittances formed on the photosensitive composition layer. When the recording material is exposed to light, the firmness with which the photosensitive composition holds the solid particles varies locally from point to point in accordance with the exposure energies of light passed through the solid particles. Thus by causing the dissolving force of the solvent or other physical forces to act on the photosensitive composition, the particles held weakly are selectively removed from the recording material, whereby an image is formed by the particles left on the recording material. The recording material on which the image has been formed can be used as a printing form as it is or by being subjected to simple after-treatment.

Abstract: A photosensitive printing plate forming material having on its surface a matting layer composed of a resin and a fine particulate material dispersed therein, said resin being at least one member selected from rosin and rosin esters.

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

Abstract: A photoreactive coating composition, particularly suited for use in a lithographic plate, is characterized by both reduced exposure time requirements and an intense visual image which is immediately produced upon exposure of the composition to light permitting visual inspection during imaging. The photoreactive composition has a diazo resin layer and an overlayer which includes a photochromic compound (e.g. an indolinobenzospiropyran compound) and a light sensitive polymer selected from the group cinnamoylated and acrylated photopolymer resins.

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.

Abstract: Light-sensitive vesicular imaging materials, suitable for the production of colored labels, etc., comprise a light-sensitive vesicular imaging layer applied to one surface of a transparent self-supporting plastics sheet or film such as a linear polyester, e.g. polyethylene terephthalate film, said light-sensitive vesicular imaging layer comprising a polymeric vehicle having uniformly dispersed therein a sensitizing agent which releases a vesicle-forming gas, preferably nitrogen, upon exposure to light and optionally including a pigment or dye, said polymeric vehicle comprising a thermoplastic polymer having a nitrogen permeability constant in the range 1.times.10.sup.-15 to 1.times.10.sup.