Curing is a term in polymer chemistry and process engineering that refers to the toughening or hardening of a polymer material by cross-linking of polymer chains, brought about by electron beams, heat or chemical additives.esin curing [edit]. Despite the wide variety of thermoset resin formulations (epoxy, vinylester, polyester, etc.), their cure behavior is qualitatively identical.
The brake drum mounts on the axle or wheel hub, and some drums incorporate the hub. Most brake drums are made of solid cast iron, but there are also steel and aluminum drums with cast iron liners. The machined friction surface on all drums is cast iron.
The Black Panther drum series are the top of the line shells and snares made by Mapex and consist of the Retrosonic, Velvetone and Blaster kits. 1  Retrosonic: The Retrosonic is made from walnut and equipped with custom full-length tube lugs and Sonic Saver hoops.