Sacrificial tape in resin or shellac coating processes. Plain woven cotton tapes are used to wrap armatures, field coils, field coil supports and transformer windings. They are also used to wrap cables, in electrical appliances and as a sacrificial item in resin or shellac coating processes. - Wrap cable in electrical appliances and small hand tools, electric drills, food mixers, electric knives. Despite the introduction of revolutionary manmade fabrics, plain cotton is still used in large quantities for electrical insulation. Carolina woven cotton tapes are sacrificial tape in resin or shellac coating processes.