Abstract: A process for producing hollow gold jewelry. A temporary substrate of soft iron is plated with precious metal leaf. A strip cut form a bimetallic plate thus plated is drawn, with incorporation of a temporary soft-iron core, to a precious metal covered wire, which can be fabricated into hollow pieces of jewelry, the soft iron being eliminated by an aqueous solution of H.sub.2 SO.sub.4.

Abstract: Bearing material, such as an aluminum alloy, is applied and bonded to the support surface by heating the surface to 500 to 700 degrees Fahrenheit, applying the bearing material in sheet form to the surface at one edge thereof, and spreading the material across the surface by moving a zone of pressure application to the bearing material from one edge of the surface to an opposed edge so as to reduce the thickness of the bearing material and to provide a flow which continually brings fresh previously unexposed bearing material from the interior of the sheet so as to effect a molecular bond. Typical applications are to sleeve type bearings or bushings, and a preferred use of the invention is the application of bearing material to connecting rods.