Chemical bath turns copper and silver jewelry black

Oxidation is a process in which elements lose electrons. When this happens to metals, their color tarnishes, resulting in a visible change. Common jewelry metals like copper and silver will oxidize, but copper is quicker to. By chemically oxidizing the metal in a liver of sulfur bath, jewelers force this color-changing process to happen on their terms. The process can transform both copper and silver from their original hues to nearly black. By doing this, jewelry is prevented from unevenly blemishing over time, and an even, long-lasting color is achieved. For more, check out: