FORMATION OF PATINA ON COPPER OR COPPER ALLOY SURFACE BY ELECTROLYSIS

摘要

PURPOSE:To form patina of superior adherence on the surface of copper or its alloy in a short time by electrolyzing the copper or alloy as an anode in an electrolyte contg. one or more kinds of (bi)caronates and one or more out of sulfates, ammonium salts, nitrates and acetates.