The wire itself is most often fully annealed, electrolytically refined copper. The Nkana Copper Refinery produces electrolytically refined copper in the form of cathodes. Electrolytically refined pure silver plating is effective at increasing resistance to tarnishing. The smelter produces high grade anodes, which are electrolytically refined. Lithium metal is isolated electrolytically from a mixture of lithium chloride and potassium chloride. The metal is produced electrolytically from a mixture of fused lithium chloride and potassium chloride. Flat steel is produced as hot or electrolytically galvanised, and plastic coated steel. Selenium can be extracted from the waste from the process of electrolytically refining copper. However, it can also be produced electrolytically.