Abstract: A method of producing a screen for printing a heating line pattern which comprises the steps of: depositing a first photosensitive emulsion layer on a screen, masking a predetermined portion of the first photosensitive emulsion layer corresponding to a heating line pattern comprising bus bars and heating lines, exposing the first photosensitive emulsion layer except the masked portion to form the first cured emulsion layer, removing the unexposed portion of the first photosensitive emulsion layer to form the permeable portion in the first cured emulsion layer, depositing a second photosensitive emulsion layer at least on the first cured emulsion layer adjacent to the permeable portions corresponding to the bus bars, masking predetermined portions of the second photosensitive emulsion layer on the first cured emulsion layer, exposing the second photosensitive emulsion layer except the masked portions to form a second cured emulsion layer comprised of unmasked exposed portions, and removing the unexposed portio

Abstract: The present invention relates to a process for preparing a multicolored proof, using a radiation-sensitive recording material which comprises a temporary, sheet-shaped layer support, a thermally transferable layer containing a colorant in one primary color and a radiation-sensitive layer. The process comprises the steps of: a) exposing the recording material imagewise b)developing the exposed layer with an aqueous-alkaline solution to uncover the thermally transferable image areas, and c) contacting the coated side of the recording material with an image receptor and transferring the transferable image areas to the image receptor, with the application of heat and pressure, to produce a partial image in the first primary color. The above-described process steps are repeated at least once, using a radiation-sensitive recording material which contains a colorant in another primary color in its thermally transferable layer.

Abstract: Disclosed is a process for preparing a cylindrical rotary screen printing stencil to made it suitable for use in a screen printing machine.In the process the steps of application of a photosensitive coating, drying, pattern-wise exposure, development and hardening are carried out while the end rings are already fitted in the ends of the screen.Described is also a system of devices suitable for carrying out said process.

Abstract: The method for forming an image which comprisesI). providing a mesh fabric substrate, andII). coating said substrate with a light sensitive screen printing composition which comprises in admixtureA). at least one substantially water soluble binder resin component comprising an admixture of polyvinyl alcohol and polyvinyl acetate in an amount of from about 33% to about 90% polyvinyl alcohol and from about 10% to about 67% polyvinyl acetate based on the weight of the resin component, in sufficient amount to bind the composition components in a substantially uniform film when the composition is coated on a substrate and dried; andB). a photosensitive component in sufficient amount to substantially, uniformly photosensitize the composition,C).

Abstract: Disclosed is an electrodeposition coating composition for use in printed circuit board photo resist, comprising (a) an acrylic resin containing (meth)acryloyl group and obtained by use of diacetone (meth)acrylamide as an essential monomer component, said acrylic resin being a water-soluble or water-dispersible photo-curable unsaturated resin having an acid value of 20 to 300, a degree of unsaturation of 0.2 to 4.5 moles/kg, a number average molecular weight of 1,000 to 100,000 and a glass transition temperature of 0.degree. to 100.degree. C., and (b) a water-insoluble photopolymerization initiator.

Abstract: A method for coating a printing screen with a sealer to avoid pinholing and damage to the screen from extended use. The method includes coating the inside of the screen with a photo emulsion, exposing the emulsion to the image to be printed, and etching out the exposed screen. Next, applying to the outside surface of the etched out screen a sheet of easy removable pressure sensitive vinyl, and next treating the etched out screen with a sealing composition, which provides a protective barrier for that part of the screen that prevents ink from printing. The sealing composition is advantageously a two part epoxy resin or an air-moisture curing urethane polymer.

Abstract: This invention relates to a screen printing stencil composition which comprises (a) a stabilized aqueous dispersion of a water insoluble addition copolymer having units of formulas: A and B where A is preferably a polyvinyl acetate group and B is preferably a polyvinyl n-methylol acrylamide group and B comprises about 3% by weight of the copolymer; (b) a water soluble colloid; and (c) a photosensitizer: The composition is useful in the formation of a screen printing stencil, the composition having both a long stable profile and forming a durable stencil; the composition on exposure through a photographic positive can be developed with water and cross-linked with acid.

Abstract: This invention relates to a radiation polymerizable composition for use in a photographic element such as a lithographic printing plate comprising in admixture(a) a polymeric binder;(b) a photoinitiator;(c) a diazonium salt; and(d) a photopolymerizable mixture of(i) a polyfunctional acrylic monomer having from 3 to 6 unsaturated groups; and(ii) a monofunctional acrylic monomer having 1 unsaturated group.

Abstract: The present invention relates to a method for forming a pattern in a metal stencil or screen which is covered by a covering layer in the form of a resist material. The pattern is formed by locally removing the lacquer or resist from the screen's perforations with the use of a beam of high energy radiation such as a laser beam. The resist material used is filled to a high concentration with metal powder to increase its thermal conductivity. The present invention also relates to a metal stencil provided with such a metal-filled covering layer which is patternable with the use of a radiation beam.

Abstract: A radiation-sensitive recording material comprising a support and first and second radiation-sensitive layers is disclosed. The first radiation-sensitive layer comprises a 1,2-quinone diazide as the radiation-sensitive compound and the second radiation-sensitive layer comprises (a) a compound which forms a strong acid under the action of actinic radiation, (b) a compound which has at least one acid-cleavable C-O-C bond and (c) a polymeric binder. The recording material has an improved storage stability as compared with materials which comprise only radiation-sensitive layers based on acid-cleavable compounds.

Abstract: This invention relates to a composition for use in a screen printing screen.

Abstract: Screen emulsions in accordance with the present invention include a poly vinyl alcohol and poly vinyl acetate or a poly vinyl acetate copolymer emulsified in water along with appropriate amounts of diacetone acrylamide and an acrylic monomer. The emulsions preferably also include a cyclic amide, phthalate plasticizers, an initiator of monomer polymerization and a thermal stabilizer. The emulsions are intended to be admixed with a photosensitive free radical-generating compound that initiates cross-linking of the polymeric components and then applied to a mesh or screen. The screen is overlaid with an obliterating material, exposed to light and then washed to remove non-exposed emulsion. The resulting screen can be used without further hardening with both water- and solvent-based inks, and the film can be removed with emulsion-removing chemicals to permit reuse of the screen.

Abstract: A photomask useful as stencil or reticle comprises a thin layer, which includes regions of different optical transmissivity for light radiation of a predetermined spectral range. The layer consists of silicon or any other suitable semiconductor material, and the regions of different transmissivity consist essentially of the monocrystalline or amorphous phase of the mask material. The photomask may be manufactured by irradiating a thin layer of monocrystalline silicon with a focussed ion beam to convert the silicon within the irradiated regions into the amorphous phase.

Abstract: Screen printing stencil for making sealing layers of elastomer material on a flat gasket. A screen carrying a photoresist layer exhibits areas of increased height on the side with which it is made to contact the flat gasket, in order to simultaneously produce sealing layer areas of different thicknesses. To make such a screen printing stencil, its screen is first provided with a first photoresist layer in which areas are then delimited by means of adhesive tapes, following which these areas may be coated with a second photoresist layer. The desired screen printing stencil is then obtained by both photoresist layers being jointly exposed and the non-exposed areas of the photoresist material being washed out.

Abstract: A greatly improved printing screen used for screen printing is provided in respect of the durability in printing, resistance against solvents and antistatic performance based on a mesh of polyester or nylon filaments. According to the invention, the base mesh is subjected to exposure to low temperature plasma of an inorganic gas prior to coating with a photosensitive resin composition in the form of an aqueous emulsion. When the plasma-treated mesh is coated, prior to coating with the photosensitive resin emulsion, with a surface active agent or when the photosensitive resin emulsion is admixed with a surface active agent, further improvement can be obtained in the antistatic performance of the screen. When a base screen dyed in yellow is used, the drawbacks caused by halation in the pattern-wise exposure of the screen to light can be greatly reduced.

Abstract: Printing screens for the screen printing of garments (e.g. T-shirts and caps) are accurately registered with respect to a printing platen of a printing machine for four color printing, or the like. The equipment utilized for the accurate registration is exceptionally versatile and easy to use, requiring no skilled labor to properly implement it. A kit includes a registration plate having pins upstanding from it, the pins having a predetermined size and spacing; four clamps for engaging a screen frame and each with an extension having openings of the same size and spacing as the pins of the registration plate; and a collar for removable attachment to the printing machine and including upstanding pins of the same size and spacing as the registration plate pins. The collar can be for attachment to a T-shirt platen, cap platen, or printing machine arm. In use four positives are stacked and punched so that they have openings of the same size and spacing as those on the clamp.

Abstract: An aperture plate for an ink jet printer of the continuous stream type is made corrosion resistant to the ink for long printer operating times. The aperture plate is made corrosion resistant by ion implantation, preferably of chromium ions by an ion beam implanting device. The walls of the aperture plate nozzles are substantially uniformly implanted by rotating and concurrently angling the aperture plate relative to the ion beam direction. The ion beam density and ion potential are regulated to predetermined ranges to assure effective corrosion protection while preventing overheating which will warp or embrittle the aperture plate.

Abstract: Particularly in the case of moulding tools for plastic products, it is desirable for these to be provided with a surface pattern which is transferred to the product. The pattern is produced by means of etching. The pattern is transferred phototechnically and the invention constitutes an improved method of performing this transfer. With the aid of an exposed screen fabric the pattern is transferred to a foil which, after coating, is provided with an adhesive layer. The coating is applied on the surface to be etched, after which the foil is removed and etching can be initiated.

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: Passivation, alpha protection and other relatively thick, patterned layers are applied to semiconductor wafers by a screen printing method. Patterned emulsions carried on fine mesh stainless steel screens are tempered at elevated temperatures to harden the emulsion. The screens so prepared withstand many cycles of printing and cleaning with harsh solvents present in screenable polymers such as polyimide and rigid silicone.

Abstract: A process is described for improving the quality of images which have been formed by screen printing a liquid photo curable photopolymer. Images formed by screen printing, especially heavy coatings such as solder masks on printed wiring boards, inherently have indistinct boundaries, and may have feathered edges and photopolymer smears. These indistinct boundaries are removed and the resolution improved by a process which utilizes the oxygen inhibition effect characteristic of selected photopolymers. Thus, a screen printed image can be 0.001 inches thick at the center of a line, tapering off to 0.0001 inch thick smears, and these smears may be eliminated by irradiating the entire image with a moderate amount light energy, which cures the thick image portion and leaves a liquid boundary layer on the order of 0.0001 inch thick due to the oxygen effect. When washed with a mild solvent the liquid layer is removed, including the smears, leaving the thick image portion undisturbed.

Abstract: A photosensitive polymer composition comprising (A) a poly(amic acid), (B) a compound or a mixture of compounds which can form a compound having two or more amino groups in the molecule, and (C) at least one compound having a boiling point of 150.degree. C. or higher at atmospheric pressure and selected from the group consisting of ##STR1## wherein R.sup.a, R.sup.b, R.sup.c, m and n are as defined in the specification, has good properties and does not produce cracks on a pattern at the time of development obtained from said composition.

Abstract: The invention provides photosensitive compositions useful in the production of screen printing stencils which comprise, in addition to the usual ingredients, also an indicator to show when a layer formed from the said composition has been isolubilized by exposure to actinic light.

Abstract: One aspect of the present invention relates to a method for making a raised line facsimile of a graphic prototype suitable for use by visually handicapped individuals in lieu of said prototype. Another aspect of this invention relates to a raised line facsimile suitable for use by visually handicapped individuals prepared in accordance with the above method. A third aspect of this invention relates to an instruction supplement assembly for teaching visually handicapped students comprising a raised line facsimile as described in the preceding paragraph and an audiotape recording containing at least one of (a) instructions for use of said facsimile and (b) descriptive information pertaining thereto.

Abstract: A light-sensitive mixture is described, which is specially intended for the production of planographic printing plates and which contains, as the light-sensitive compound, a naphthoquinonediazide sulfonic acid ester of the general formula I ##STR1## in which D is the 1,2-naphthoquinone-2-diazide-5-sulfonyl radical or the 1,2-naphthoquinone-2-diazide-4-sulfonyl radical, preferably the 1,2-naphthoquinone-2-diazide-5-sulfonyl radical, R and R' are hydrogen atoms, alkyl groups having 1 to 4 carbon atoms or radicals of the formula DO, and n denotes an integer from 6 to 18, preferably from 8 to 14. The new compounds are distinguished by good solubility and produce layers which have a high resistance to alkaline developer solutions and to damping solution containing alcohol.

Abstract: A process for making relatively thick foraminous members the foramina of which form a preselected pattern. The backing film such as a thermoplastic film is placed in contact with a rotating drum. A foraminous woven element about which the foraminous member will be constructed is placed in contact with the thermoplastic backing film. Liquid photosensitive resin is supplied to a controlled thickness. A mask comprising the preselected pattern is placed adjacent the photosensitive resin and the resin is exposed through the mask to the light of an activating wavelength. Uncured resin is washed from the composite leaving behind the completed foraminous member.

Abstract: A process is described for preparing relief images, in which a light-sensitive material composed of a support and a light-sensitive layer which contains as essential constituents(a) a compound which has at least one C-O-C bond which is cleavable by acid,(b) a compound which forms a strong acid on irradiation and(c) a binder which is insoluble in water and soluble in aqueous-alkaline solutions is imagewise irradiated, warmed to an elevated temperature, cooled down and then irradiated over its entire area, whereafter those parts of the layer which have not been imagewise irradiated are then washed out by developing. The process makes it possible to prepare positive or negative copies by means of the same light-sensitive material in a simple way.

Abstract: Aqueous compositions useful in making stencils for screen printing comprise a solution of an unsaturated prepolymer dispersed in an aqueous solution of a colloid, and a photo-initiator. Such compositions may be coated on suitable support sheets to produce photosensitive sheets useful for making stencils for screen printing by the direct, indirect, or direct/indirect methods.

Abstract: Aqueous compositions useful in making stencils for screen printing by the direct, indirect or direct/indirect method comprise a photopolymerizable monomer, a water-insoluble photoinitiator, a tertiary amine accelerator, a water-soluble colloid, water, and a water-miscible organic solvent.

Abstract: Method and apparatus are described for producing a unique machine-readable marking, such as a bar-code marking, on each of a succession of workpieces, such as glass envelope parts of cathode-ray tubes. The method comprises producing and applying a different unique stencil for each workpiece and then applying a suitable paint through the stencil.

Abstract: Stencils of a desired design are made by selective hardening of first and second individually soluble substances being hardenable in admixture in a foraminous stencil blank, which is initially impregnated with the first substance. The second substance is stored separately from such impregnated stencil blank, such as in a pen. This separately stored second substance is thereafter selectively applied in the form of the desired design to the impregnated stencil blank for admixture with the first substance only immediately prior to a desired selective hardening of the admixed first and second substances, to render part of the stencil imperforate. A stencil is also exposed to dissolution of any applied first and second substances outside of the latter part, for rendering the stencil perforate outside of that part.

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: A radiation-polymerizable mixture is described comprising (a) a compound which has at least two terminal ethylenically unsaturated groups and which can form a crosslinked polymer by means of free radical initiated chain addition polymerization, (b) a polymeric binder, (c) a radiation-activatable polymerization initiator which can be activated by radiation, and (d) a compound which is thermally crosslinkable with the polymeric binder (b), with the polymerization product of compound (a) and/or with itself and which, if its crosslinking groups are epoxy groups, has at least three epoxy groups. A photopolymerizable copying material is also disclosed having a flexible transparent temporary support and a transferable thermoplastic photopolymerizable layer comprising the foregoing radiation-polymerizable mixture. The photopolymerizable layer, after photocrosslinking, can be additionally cured by thermal crosslinking and is therefore suitable for the manufacture of solder resists and high performance printing plates.

Abstract: Aqueous compositions useful in making stencils for screen printing comprise one or more unsaturated monomers, a tertiary amino compound, a colloid, and a water-soluble, carboxy- or sulpho-alkyleneoxy-thioxanthone photoinitiator. When coated on to a suitable support sheet and dried, photosensitive sheets are obtained useful for making stencils for screen printing by the direct, indirect, or direct/indirect methods.

Abstract: This invention is directed to processes for using a light sensitive photoresist material in the manufacture of an article having a surface permanently modified in an image pattern. The process comprises applying the photoresist to a substrate through a screen, preferably as a continuous, incompletely imaged layer and thereafter, imaging and developing to provide a relief image in the photoresist layer and treating the substrate to provide a permanent image in the finished article. The process is particularly useful in the manufacture of printed circuits. The process is believed to be a departure from conventional processes in the step of screening a light sensitive photoresist material over a substrate.

Abstract: A positive, continuous tone, dye image is produced by means of a dye imbibition imaging element comprising (a) a support having thereon, (b) a cationic mordant layer for an anionic dye, and (c) a sensitized photohardenable photopolymer layer consisting essentially of a photosensitive polyesterionomer. A process for forming a positive, continuous tone dye image in a dye imbibition imaging element, as described, comprises the steps of: (1) imagewise exposing the photopolymer layer of the element to activating radiation to imagewise harden the photopolymer layer; then (2) developing the photopolymer layer by means of water rinsing; and, then (3) imbibing an anionic dye into the mordant layer through the unexposed areas of the photopolymer layer. Alternatively, the process comprises immersing the imagewise-exposed element from step (1) into a bath comprising the anionic dye without the need for a water rinsing step.

Abstract: A print screen stencil for printing with corrosive printing compositions is disclosed. The stencil comprises a screen fabric having open mesh areas in a predetermined pattern adapted to allow the passage of a printing composition to a substrate positioned beneath the fabric and filled or closed mesh areas adapted to prevent the passage of a printing composition, the filled mesh areas comprising a resist coating encasing the mesh in the filled areas, the resist coating comprising cross-linked acrylic polymer intimately dispersed in fused vinyl resin.

Abstract: Method of forming a color image of a graphic object pattern directly on a support medium. A water-soluble photosensitive stencil material is coated on the support and exposed imagewise to actinic radiation. The exposed photosensitive stencil material is developed to remove the water-soluble, unexposed stencil material. A layer of water-permeable, water-insoluble color medium is applied. The color medium is treated with water or an aqueous solution to permeate the color medium and soften the stencil material which is removed by mechanical action. Alternatively, a water-insoluble photosensitive stencil material, which becomes water-soluble on exposure to actinic radiation, may be coated on the support.

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 radiation curable printing medium suitable for screen printing on glass, metal and ceramics which is to be cured and subsequently fired, comprising(a) 4 to 25% by weight of a polymerizable, liquid prepolymer containing at least about two ethylenically unsaturated end groups;(b) 4 to 15% by weight of at least one ethylenically unsaturated polymerizable monomer containing a polar functional group;(c) 60 to 90% by weight of a ceramic frit; and(d) 0.02 to 2% by weight of a polymerization inhibitor.

Abstract: An improved process for producing a photo-curable composite material using a liquid photo-curable resin, which comprises holding a liquid photo-curable resin with a screen material between two films, at least one of the films having photo-transmitting properties, and passing the films holding the liquid photo-curable resin and the screen material through a gap (e.g. between two rollers). The process of the present invention can produce photo-curable composite materials useful for preparing various stencils for screen printing, textile printing, or the like at a low cost and with less production of defects.

Abstract: This invention relates to an improvement in a light-sensitive recording material comprising a support and a light-sensitive layer including a diazonium salt polycondensation product composed of recurrent units of the general types(A--N.sub.2 X) and (B)which are connected with each other by bivalent intermediate members derived from a condensable carbonyl compound and wherein A is the radical of a diazonium salt which comprises at least two isocyclic or heterocyclic aromatic rings and which in at least one position of its molecule is capable of condensation with formaldehyde in an acid medium, B is the radical of a compound free of diazonium groups which in at least one position of its molecule is capable of condensation with formaldehyde in an acid medium, and X is the anion of the diazonium salt, the improvement that the light-sensitive layer additionally contains about 6 to 20 parts by weight of amine resin per part by weight of the polycondensation product.

Abstract: A high resolution image is accurately but readily reproduced by placement of a film master, such as a positive photographic film, in direct contact with a wet, high solids content, radiation curable material distributed on a screen. The radiation curable material is responsive to a limited wavelength band in the ultraviolet region. It includes a sensitizer, may include a reactive diluent, is preferably free of acrylates and of low toxicity, has a viscosity sufficient to maintain a fixed spatial relationship between the master and substrate, and further advantageously incorporates a minor amount of radiation attenuating dimensional stabilizer in the form of a distributed particulate. The photopolymer material is first spread across one side of the screen against the film master to form an underlayer which is then irradiated through the film master with a suitable light source.

Abstract: A photo-curable composite material used for preparing various stencils for screen printing, textile printing or the like, which comprises a flat, flexible and photo-transmitting thin film (A); a flat and flexible film (B); a liquid photo-curable resin and a flat screen material, said films (A) and (B) being air-tightly bonded to each other at the peripheral portion thereof to form a flat inner space therein, said liquid resin being filled in said inner space to form a layer and said screen material also being placed in the inner space substantially in parallel with the inner walls of the films (A) and (B).

Abstract: A print screen stencil for printing with corrosive printing compositions is disclosed. The stencil comprises a screen fabric having open mesh areas in a predetermined pattern adapted to allow the passage of a printing composition to a substrate positioned beneath the fabric and filled or closed mesh areas adapted to prevent the passage of a printing composition, the filled mesh areas comprising a resist coating encasing the mesh in the filled areas, the resist coating comprising cross-linked acrylic polymer intimately dispersed in fused vinyl resin.

Abstract: Screen printing stencils are prepared by afixing to a printing screen substrate an indicia-defining, ultraviolet-sensitive film and cross-linking the film by exposure to ultraviolet radiation. The coating compositions used to form the film comprise copolyacrylate/polyurethane block copolymers, in which the copolyacrylate blocks are copolymers of at least one hydroxy-containing acrylate and at least one acrylate or methacrylate which may be partially substituted with bromine, ultraviolet initiators and cross-linking monomers. Screen printing stencils are provided which are compatible with both water-based and oil-based inks. The disclosed screen printing stencils are used in improved screen-printing methods.

Abstract: A stencil sheet is prepared with an ink-impervious coating of a film forming, solventless olefinic material. The coating includes a photopolymerization initiator, and may be applied to a tissue base in liquid form and thereafter cured by exposure to ultraviolet radiation. The present invention reduces the cost and pollution generation that conventionally attends the preparation of stencil sheets.

Abstract: The invention provides on improved process for preparing a screen stencil, and a screen stencil prepared by the process. The process includes the steps of placing a porous support for a screen stencil over a mounting plate, saturating the porous support with a substantially carrier-free radiation curable composition. A backing plate is placed over the saturated porous support and rolling pressure is applied to the backing plate while allowing any excess composition to flow out from between the mounting plate and backing plate. The composition is then exposed to radiation through a positive disposed opposite the backing plate, and thereafter, uncured composition is removed from the porous support.

Abstract: Screen printing stencils are prepared by affixing to a printing screen substrate an indicia-defining, ultraviolet-sensitive film and cross-linking the film by exposure to ultraviolet radiation. The coating compositions used to form the film comprise copolyacrylate/polyurethane block copolymers, in which the copolyacrylate blocks are copolymers of at least one hydroxy-containing acrylate and at least one acrylate or methacrylate which may be partially substituted with bromine, ultraviolet initiators and cross-linking monomers. Screen printing stencils are provided which are compatible with both water-based and oil-based inks. The disclosed screen printing stencils are used in improved screen-printing methods.

Abstract: Linear means, particularly for producing a mirror having a discrete transparent portion of a desired shape, configuration or ornamentation and having a backing which may have a discrete image of corresponding shape, configuration or ornamentation affixed in juxtaposition thereto, is set forth. The means of production of said mirror include providing, upon a glass surface, a layer of reflective substance, applying over said reflective substance, a layer of protective resist material which delineates, outlines and profiles said desired shape, configuration or ornamentation, then treating said coated glass surface to set said resist and washing the same to remove unprotected reflective portions delineated by said protective layer and exposed to said wash.