Abstract: A process for forming a photoresist pattern comprises the steps of forming a photoresist layer on an underlying layer, forming a contrast enhancement layer for enhancing the contrast of light entering the photoresist layer on the photoresist layer, selectively exposing the photoresist layer through the contrast enhancement layer to light, and developing the photoresist layer to form a photoresist pattern. The contrast enhancement layer is formed as a layer containing a photobleachable agent and a material soluble in both of a nonpolar organic solvent and an aqueous alkali solution. The material is selected from the group of abietic acid, a derivative thereof, a rosin containing abietic acid as the main component, and a derivative thereof. The contrast enhancement layer is treated and removed simultaneously with development for the photoresist. The stability of a coating solution for the contrast enhancement layer is remarkably high.

Abstract: The invention relates to a process for producing supports intended for the optical recording and reading of information. A layer containing a diazo compound is deposited onto a metallized substrate. Recording is obtained by exposing the support to light through a mask, the exposed zones of the layer of diazo compound being decomposed. Dry development in ammonia vapors shows up transparent zones and opaque zones corresponding to the information.

Abstract: Photopolymeric printing plates wherein an electrochemically etched, anodized and silicated aluminum plate has a plurality of coatings applied thereon and wherein at least one of the coatings include a solvent soluble diazo therein.

Abstract: Disclosed is a pattern forming method using contrast enhanced material for enhancing the resolution and contrast when forming patterns in fabrication of semiconductors or the like. This pattern forming method comprises a step of applying a contrast enhanced material for pattern forming on a photoresist, a step of exposing and a step of developing.The contrast enhanced material is a water-soluble material using a novel diazo compound so that the coefficient A of the contrast may be 10 or more, and when it is combined with g-line exposure to be used in pattern formation, a pattern of 0.5 .mu.m or less may be formed.

Abstract: An optical recording material comprising (I) a substrate, (II) a recording layer provided on said substrate, the recording layer consisting of light transmissive portions and light screening portions, and (III) a reflective metallic thin film layer provided on the recording layer; as well as a process therefor. The invention also includes an optical card comprising the optical recording material provided on a card substrate. In the cases of the optical recording material and the optical card, it is possible to readily carry out high density recording, the alternation of written information is difficult, and the written information can be read out on a basis of the difference in light reflectivity.

Abstract: In a process for reducing halations during the imagewise irradiation of a reproduction layer exposed through a planar image original, at least one lubricant either is contained in the layer or is interposed between the layer and the image original. Suitable lubricants include organic polysiloxanes, hydrocarbon polymers, polyaryl esters, and alkanoic acids or alkenoic acids having at least 9 carbon atoms. Excluded are lubricants comprising copolymers of dimethyl dichlorosilane, ethylene oxide and propylene oxide, provided they are located in the reproduction layer.

Abstract: An optical recording material comprising (I) a substrate, (II) a recording layer provided on said substrate, the recording layer consisting of light transmissive portions and light screening portions, and (III) a reflective metallic thin film layer provided on the recording layer; as well as a process therefor. The invention also includes an optical card comprising the optical recording material provided on a card substrate. In the cases of the optical recording material and the optical card, it is possible to readily carry out high density recording, the alternation of written information is difficult, and the written information can be read out on a basis of the difference in light reflectivity.

Abstract: A light-sensitive, diazonium group-containing polycondensation product is described which comprises(a) an optionally substituted diphenylamine-dianzonium salt I.(b) a compound corresponding to the formula IIR.sup.4 --O--CH.sub.2 --R.sup.5 (II)whereinR.sup.4 is H, alkyl or acyl, andR.sup.5 is an optionally substituted aromatic radical, and(c) a compound corresponding to the formula IIIR.sup.6 --O--CH.sub.2 --R.sup.8 --CH.sub.2 --O--R.sup.7 (III)whereinR.sup.6 and R.sup.7 are H, alkyl, or acyl andR.sup.8 is the radical of a compound selected from the group consisting of aromatic hydrocarbons, phenols, phenolethers, aromatic thioethers, aromatic heterocyclic compounds, and organic acid amides,with the radicals resulting from compound II being directing linked to the units of the diazonium salt I.In the production of the polycondensation product, I is first condensed with II and then with III.

Abstract: Quinone diazide derivatives of adamantane, and especially quinone diazide derivatives of 1,3-dialkyl-5,7-bis(hydroyphenol) adamantanes, have been found to provide unique properties when coated on metal substrate in the preparation of both positive and negative working lithographic plates. The improved lithographic plates are characterized by enhanced speed, coating oleophilicity, alkali resistance, developer latitude and development speed.

Abstract: A recording medium utilizing metal azides as an energy amplifying substance is disclosed. A photosensitive material comprises an energy absorptive dye and a metal azide dispersed in an inert binder. Low to moderate pulses of laser light cause the azide particles to react exothermally creating a void in the photosensitive material which can be read by an optical readout device.

Abstract: A record memory medium comprises a recording layer comprising a monomolecular film or monomolecular layer built-up film of a photosensitive organic compound having a hydrophilic moiety and a hydrophobic moiety. The medium can be used for recording/reading-out of information and light recording.

Abstract: A lithographic resin for use with deep ultraviolet radiation comprises a weakly acidic resin and an alpha phosphoryl substituted diazo carbonyl compound as a sensitizer.

Abstract: A water developable printing plate is provided with a photopolymerizable system as a latex comprising a water soluble diazopolymer reaction product of a diazoaryl amine and an aldehyde and an aqueous cationic or nonionic dispersion of a water insoluble polymer. The inclusion of a water miscible organic solvent improves the shelf-life of the photopolymerizable system and the printing plate especially under high humidity conditions.

Abstract: This invention relates to a light-sensitive copying material comprising a layer support and a positive-working light-sensitive layer thereon having a rough surface and a content of finely divided particles, wherein the smallest dimension of the particles corresponds at least to the thickness of the layer.

Abstract: A color image forming method wherein a colored, water soluble polymer and a photo-sensitive polymerization initiator are layered upon a transparent base material, exposed to light through a negative original, washed with water to remove unpolymerized material, proofed, and then dyed to an optical density of at least 2.5.

Abstract: A negative-working image forming process which comprises uniformly exposing a photosensitive material comprising a support having thereon a sensitive layer comprising (i) an o-quinonediazide compound and (ii) a second compound, to actinic radiation which is able to convert the o-quinonediazide compound to the corresponding indenecarboxylic acid compound, and subsequent to said uniformly exposing imagewise exposing said exposed photosensitive material to a laser beam to thereby render the indenecarboxylic acid compound of the imagewise exposed areas convert to the corresponding indene compound and developing with an alkaline developing solution to dissolve out the unexposed area to the laser beam, wherein said second compound reduces the rate of dissolution of the laser exposed areas in the developing solution by converting the indenecarboxylic acid to the corresponding indene compound, whereby said image results.

Abstract: A process for the rapid curing of polyurethanes comprising the steps of (a) mixing together a diisocyanate compound, a diol, a polyol, and a diazonium salt and thereafter (b) exposing the resulting mixture to ultraviolet light in the wavelength range of about 2000 to about 4000 Angstroms for a period of about 0.1 second to about 20 minutes at a temperature in the range of about 0.degree. F. to about 180.degree. F.

Abstract: An improved diazotype photoprinting material of high printing speed and its method of preparation are disclosed. The improvement is achieved by distributing through the film coating a substantially uniform distribution of sites having a refractive index substantially different from that of the remainder of the coating. The sites consist of either voids or finely divided solids. Voids are created by contacting the film coating with an aqueous fluid at elevated temperature or an organic solvent for a sufficient period of time to cause a measurable haze to appear on the film. The sites operate to reflect or refract incident light rays during imagewise exposure, and thus increase the optical path length through a given thickness of film.

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: Light-sensitive compositions and materials incorporating such compositions, such as coated films for the production of polymeric resists, comprise a diazo-resin as a sensitizer for the composition and a water-soluble or water-dispersible colloid. In order to stabilize the diazo-resin sensitizer and increase the time between manufacture and use of such light-sensitive compositions and material, a poly-(vinylpyridine) is incorporated in the composition, preferably in the form of a water-soluble salt such as the hydrochloride or sulphate.

Abstract: Presensitized lithographic printing plates, having extended press run life, are provided by electrolytically passing a current through the light-sensitive material in the prefabricated plate. Press runs of up to sixty percent longer than expected are possible with plates which are so treated.

Abstract: A process for producing relief copies wherein the light-hardenable layer of a light-hardenable copying material, which contains a photopolymerizable mixture, a photodimerizable polymeric compound or a diazonium salt polycondensation product, is exposed to a light image, the exposed layer is subjected to a brief ultrasonic treatment, and the unexposed areas of the layer are thereafter washed away by means of a developer. As a result of the ultrasonic treatment, shorter exposure times may be used and better in-depth hardening of the layer may be achieved.

Abstract: This invention relates to novel condensation products, novel light-sensitive condensation products of aromatic diazonium salts, processes for preparation thereof, and to light-sensitive reproduction materials, which latter comprise a support having a reproduction layer containing at least one of the novel light-sensitive products. The light-sensitive condensation products are prepared by first homo-condensing non-diazo containing monomers of the structure R--M--R to form an oligomer. The oligomer is next condensed with an aromatic diazonium salt form the desired novel light-sensitive condensation product. R is a reactive substituent capable of undergoing condensation reactions in acid medium. M is selected from the group consisting of aromatic hydrocarbons, diaryl ethers, diaryl sulfides, diaryl amines, diaryl sulfones, diaryl ketones and diaryl diketones. The resulting novel light-sensitive condensation products have approximately four times the speed of prior art compounds.

Abstract: A diazo type thermosensitive recording material comprising a support material and a thermosensitive recording layer formed thereon, wherein the thermosensitive recording layer comprises a diazo compound, a coupler, a thermo-fusible or thermo-softening binder agent and a thermo-fusible material. The weight ratio of the diazo compound and the thermo-fusible material is in the range of 1:2 to 1:30, and both the diazo compound and the coupler exist as separate particles in the thermosensitive recording layer.

Abstract: Photographic production of characters (11) and the like for the title set on photo material (10) which is insensitive in respect of daylight and sufficiently sensitive in respect of short-wave light. Developer liquid wettens the photo material (10) and is protected by a millimeter grid cover film (12). A recording carrier film (15) with transparent letters (16) and the like, on a colored ground which is opaque in respect of short-wave light, is laid on the photo material or cover film and moved into a condition of alignment (millimeter grid). Short-wave light of the correct amount is produced by a special flash device (20).

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 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: The sensitivity of a positive working electron beam resist is increased by using as the resist material a resin which is a condensation product of formaldehyde with a phenol or a cresol having a chloro substituent ortho to the hydroxyl group on its aromatic ring.

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 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: A light-sensitive silver halide photographic material comprising a combination of a salt of tetrazolium containing only a non-metallic anion and a salt of tetrazolium containing a metallic anion.

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: 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: An electrophotographic element that comprises an electrically conductive support and a photoconductive layer containing a photosensitive azo-compound dispersed in a film-forming polymeric binder is prepared by synthesizing the photosensitive azo-compound in situ, by reaction between a diazonium compound and an azo-coupling component, in the film-forming polymeric layer on the support. The azo-compounds thus synthetized are distributed in the binder layer in an almost perfectly homogeneous form. Under an electron microscope screen scan they are not distinguishable as separate particles, even at a ten thousand fold magnification. By forming a very thin photoconductive layer in this way and coating it with a charge transporting top layer, especially useful electrophotographic elements are obtained. The invention relates also to electrophotographic elements prepared according to the process.

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 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: There is disclosed a cobalt(III) complex-containing photographic composition, element and process which can be made negative-working or positive-working. Featured are an exposure activatible image precursor composition and a photoinhibitor composition capable of inhibiting image formation in the image precursor composition.

Abstract: A photochemical color-printing process for textile articles wherein a photosensitive triazene and azo dye coupling agent are applied to surface of textile article, the coated textile is exposed to light with a negative image, unreacted chemical products are removed by washing and rinsing the coated textile article after imaging, and then the coated textile article is dried.

Abstract: A development method which comprises imagewise exposing a positive acting light-sensitive planographic printing plate comprising an aluminum support and a light-sensitive layer of an o-quinonediazide compound formed thereon, and then developing the exposed plate with a developer, comprising an aqueous solution of an alkali metal silicate, adding a supplementary solution comprising an aqueous solution of an alkali metal silicate to the developer to compensate for the degradation of the developer brought about by development and/or by carbon dioxide in the air; wherein the developer comprises an aqueous solution of an alkali metal salt having an [SiO.sub.2 ]/[M] ratio of from 0.5 to 0.75 and an SiO.sub.2 concentration of from 1 to 4% by weight based on the total weight of the developer, where [SiO.sub.2 ] represents the concentration of SiO.sub.

Abstract: This invention relates to an improvement in a material adapted for imagewise exposure to actinic light comprising a transparent or translucent support having a positive-acting quinone diazide light-sensitive coating composition in direct contact with one surface thereof, the improvement comprising that the surface of said coating in direct contact with said support is substantially photodecomposed, and that a gradient exists in said coating wherein the percentage of undecomposed light-sensitive quinone diazide increases with increasing distance from said support. The invention also relates to a method for preparing the novel material.

Abstract: This invention relates to an improvement in a photochemical process for the preparation of printing plates wherein a printing plate comprising a photosensitive composition coated on a support is exposed to a pattern of laser light, the intensity of which light is modulated in accordance with an input source of information, and said printing plate is subsequently developed by removal from said support of that portion of the photosensitive coating composition which is not exposed to said pattern of laser light, the improvement comprising utilizing a pattern of laser light generated by a laser, and utilizing as a photosensitive composition a mixture consisting essentially of: (1) a negative-working condensate of a para-amino benzene diazonium compound present in an effective amount sufficient to sensitize said photosensitive composition to laser light, and (2) a colorant capable of absorbing light in the spectral range between about 450 -550 nm, said colorant selectively sensitizing the condensate to said laser

Abstract: A light-sensitive image recording material comprising, as a self-supporting film or in one or more layers on a support, at least(a) a heat sensitive coloring element comprising at least one polyvinyl pyridine and at least one polyvinylidene halide, and(b) a light sensitizing element comprising at least one of(1) a compound which, on exposure to actinic radiation, is capable of complexing the polyvinyl pyridine of element (a) or is capable of forming a quaternary salt with the polyvinyl pyridine of element (a), or(2) a compound which, on exposure to actinic radiation, is capable of releasing a precursor which is capable of complexing the polyvinyl pyridine of element (a) or is capable of forming a quaternary salt with the polyvinyl pyridine of element (a) under heating,and a dry process for recording a light image comprising(1) imagewise exposing to actinic radiation the light-sensitive image recording material described above, and(2) uniformly heating the imagewise exposed light-sensitive image recording mate

Abstract: A method for developing a light-sensitive lithographic printing plate having an image-forming layer containing a substantially water-insoluble diazo resin thereon using a developer composition which comprises (a) benzyl alcohol, .alpha.-methylbenzyl alcohol, ethylene glycol monophenyl ether and/or ethylene glycol monobenzyl ether, (b) an anionic surface active agent and (c) a water-soluble sulfite.