Abstract: A composite lead sheet product comprising a layer of lead or lead alloy having first and second surfaces. A first layer of a porous, non-metallic material is mechanically bonded to the first surface of the lead layer, and a second layer of porous, non-metallic material is mechanically bonded to the second surface of the lead layer. The method of making the composite of this invention comprises supporting a first layer of a porous, non-metallic sheet material on a heat sink. Molten lead or lead alloy is dispensed transversely across the first layer. A second layer of a porous, non-metallic sheet material is applied over the dispensed molten lead. The second layer is pressed into the molten lead, and the molten lead is pressed into the first layer with a roller, to mechanically bond the first and second layers to the lead.

Abstract: A method of alloying powdered aluminum into lead to form lead-calcium-aluminum alloys with relatively high recoveries and low standard deviations of recoveries. The method comprises melting lead, heating the lead, injecting simultaneously calcium-containing granules and aluminum powder into the lead under the surface. The alloying material preferably has a total calcuim content of between about 65% and 80% by weight and a total aluminum content of between about 35% and 20%. The material is preferably injected into an injection bell to hold the alloying material under the surface of the lead.