Abstract: Lithographic printing plates are made by exposing to actinic light a lithographic plate having a water soluble light sensitive layer thereon and a coating of a solvent soluble, UV curable material thereover to form an image in the light sensitive layer and adhere said layer to the overlying UV curable material. The plate is developed with water to remove light sensitive layer and overlying UV curable material in the non-image areas, and the plate is exposed to UV source having an intensity greater than the imaging light to form a press-ready plate having a durable, reinforced cured image thereon.

Abstract: Lithographic printing plates are made by exposing to actinic light a lithographic plate having a water soluble light sensitive layer thereon to form an image in said layer. A solvent soluble, UV curable material is adhered to the image in said layer. The plate is developed before or after applying the UV curable material. The plate is exposed to UV source having an intensity greater than the imaging light to form a press-ready plate having a durable, reinforced cured image thereon.

Abstract: Method for lithographic printing wherein a lithographic printing plate having oleophilic and hydrophilic areas on the printing surface of the plate is contacted with ink and an aqueous fountain solution during printing. An aqueous solution comprising an enzyme is used as the fountain solution.

Abstract: Aluminum substrate suitable for making lithographic plates which has been treated to render the surface hydrophilic and negatively charged and thereafter ionically colored with a cationic dye.

Abstract: Anodized aluminum having a porous, unsealed anodic oxide layer is provided with a polymeric coating over the oxide layer that is substantive to a sublimatable dye. A sublimated dye forms a design or image in the oxide layer and the polymeric coating. Single and multi-color designs and images can be used for nameplates, dials and signs.

Abstract: Planar surfaces are roughened by graining with an aqueous slurry of unfused platy, crystalline alumina. Preferably, an aluminum base with is adapted to receive a light-sensitive coating thereon to make lithographic plate is grained with said aqueous slurry.

Abstract: Continuous tone images are reproduced on a plate having metallic images adherently and preferably conductively bonded to a physically roughened support by contacting with a photographic physical developer an imaging medium comprising a physically developable image of the continuous tone image. The process has the capability of producing an imaged plate containing metal images of varying contrast and varying tonal range and then using the imaged plate as a printing plate. A preferred copy medium comprises a thin silver halide layer coated on a grained and anodized aluminum support.