Spelter been used since about the 1860s to make statues, tablewares, and lamps that resemble bronze. Spelter is soft and breaks easily. To test for spelter, scratch the base of the piece. Bronze will appear as bright yellow while spelter will show a silvery scratch. The word "pewter" is thought to be derived from the word "spelter". Zinc ingots formed by smelting might also be termed spelter. Spelter Spelter, while sometimes used merely as a synonym for zinc, is often used to identify a zinc alloy. In this sense it might be an alloy of equal parts copper and zinc, i.e.
Electroplating of copper from the anode source to a plate covering the cathode. The plating is most commonly a single metallic element, not an alloy. However, some alloys can be electrodeposited, notably brass and solder. Many plating baths include cyanides of other metals (such as potassium cyanide) in addition to cyanides of the metal to be deposited. These free cyanides facilitate anode corrosion, help to maintain a constant metal ion level and contribute to conductivity. Additionally, non-metal chemicals such as carbonates and phosphates may be added to increase conductivity. When plating is not desired on certain areas of the substrate, stop-offs