On glazed surfaces, we apply metallic materials. Lusters are pure metals suspended in an oil base that may be applied with a brush after dissolving them with hydrochloric acid. Although precious metals are frequently employed, lusters are typically only used as highlights, such as pinstripes or minor applications, regardless of the metal. The firing takes place at a very low temperature (around 1200 F). The oil resin is burnt away, leaving a thin layer of metal on the glaze surface that may be easily wiped off with continued usage of the item.