Abstract: An improved peel apart photosensitive element for producing duplicate solvent-developed images comprising a strippable cover sheet, a photoadherent layer, a solvent-soluble, nontonable, polymeric nonphotosensitive contiguous layer and a support for photomechanical applications.

Abstract: An improved photosensitive element comprises a cover sheet, a photoadherent layer, and a tonable contiguous layer receptive to colorant or particulate material for applications such as color proofing. Such elements are capable of producing duplicate images.

Abstract: Preparation of an electrically conductive pattern by adhering a prolonged tack toner which is activated by heating to the toner-receptive image areas of an inert substrate, the temperature is reduced and to the activated toner is applied a prolonged tack toner having conductive metal particles and glass frit as components; optionally the steps of heating, temperature reduction and toner application are repeated at least one time, and then the toned image is burned and fired. An electrically conductive pattern is obtained which is useful, for example, as an electric circuit. The process is also useful in the application of resistor and dielectric materials.

Abstract: A dry-developing dry film resist is provided comprising a photopolymerizable layer preferably sandwiched between a support sheet and a cover sheet, the layer comprising polymerizable monomer in excess of the absorptive capacity of the layer, photopolymerization initiator, and binder component of a plurality of polymers, at least one of these polymers being incompatible so as to be present as a dispersion in the layer to reduce the cohesive strength of the layer. The layer is developed by peeling away the support sheet, the unexposed area of the layer adhering to the support sheet and the exposed area adhering to the substrate to which it was laminated to form a resist image against such treatments as etching, plating and soldering, especially to make a printed circuit.

Abstract: Process for preparation of multicolor surprint proofs from a composite photoimaged element, e.g., photopolymer element, having, in order, a sheet support, at least two colored photoimaged elements, and a layer of colloidal silica applied thereon, said colloidal silica being coated from a substantially aqueous dispersion wherein the colloidal silica has an average particle diameter of less than 500 nm and wherein at least 75% of the solids of said dispersion are silica, the silica layer being at least 20 mg/dm.sup.2 when dried. The multicolor proofs obtained contain a sharp image free from any three-dimensional effects and have a delustered, matte appearance which simulates printed press sheets.

Abstract: An improved peel apart photosensitive element comprises a strippable cover sheet, a photoadherent layer, and a tacky, nonphotosensitive contiguous layer receptive to colorant or particulate material, and a support. The element is useful in applications such as color proofing. Such elements are capable of producing reverse toned or colored images as well as duplicate colored images with greatly improved tonal range and image fidelity.

Abstract: An improved peel apart photosensitive element comprises a strippable cover sheet, a photoadherent layer, and a tacky, nonphotosensitive contiguous layer receptive to colorant or particulate material, and a support. The element is useful in applications such as color proofing. Such elements are capable of producing reverse toned or colored images as well as duplicate colored images with greatly improved tonal range and image fidelity.

Abstract: Photopolymerizable elements are described comprising a sheet support, a photopolymerizable layer having a thickness of, at most, 0.0006 inch (0.015 mm.) and an optical density of at least 3.0 in the actinic region. Resist images made from these elements may be etched by a process of chemically undercutting the image areas and then spraying or rubbing them. The elements are useful as contact speed lithographic films and for other graphic arts applications.

Abstract: High contrast, dot-etchable solvent-processable lithographic film elements are described comprising a sheet support, a photopolymerizable layer having a thickness of, at most, 0.0004 inch (0.010 mm) and an optical density of at least 3.0 in the actinic region. Images made from these elements may be reduced in area by a process of chemically undercutting the image areas and then spraying or rubbing them. The elements are useful as contact speed lithographic films and for other graphic arts applications.

Abstract: A process for forming a photoresist which comprises:(1) applying to a surface the surface of a solid unexposed photosensitive layer of thermoplastic photosoluble or photodesensitizable material, the other surface being adhered to a film support, then in either order(2) exposing the layer, and(3) stripping the support, and then(4) washing away the exposed areas of the layer.The surface bearing the resist can be etched, plated, or treated in other ways.

Abstract: An image reproduction process which comprises (1) exposing imagewise to actinic radiation a photosensitive element comprising a cover sheet, a photoadherent layer, and a solvent-soluble, contiguous layer, (2) stripping the cover sheet from the element with either the exposed or unexposed areas of the photoadherent layer adhered to the cover sheet while the other areas of the photoadherent layer remain on the contiguous layer, and (3) washing out the bared areas of the contiguous layer.

Abstract: An image reproduction process which comprises exposing a multilayer element comprising (1) cover sheet, (2) photoadherent layer, and (3) tonable contiguous layer; stripping the cover sheet with either the exposed or unexposed areas of the photoadherent layer adhered thereto while the other areas of the photoadherent layer remain on the contiguous layer; and toning the areas of the contiguous layer from which the photoadherent layer were removed. Reverse and duplicate images can be produced.

Abstract: Photopolymerizable elements are described comprising a sheet support, a photopolymerizable layer having a thickness of, at most, 0.0006 inch (0.015 mm.) and an optical density of at least 3.0 in the actinic region. Resist images made from these elements may be etched by a process of chemically undercutting the image areas and then spraying or rubbing them. The elements are useful as contact speed lithographic films and for other graphic arts applications.

Abstract: An apparatus for the application of a controlled quantity of finely divided particulate material on a tacky surface, without imparting any shearing force, having a porous, rotating, laterally movable, cylindrical cartridge for storing and dispensing said particulate material which performs a sieving operation to break up particle aggregates prior to dispensing said particulate material, a roller for transferring said particulate material from the dispensing cartridge to the tacky surface as the roller moves over said surface and, a housing for said elements.