JSP® Blak-Ox , produces the darkest smooth deep black patina on silver and gold.
Contains a mixture of 3oz of hydrochloric acid. Dilute with water for shades of gray. Works on silver, gold, copper, brass and bronze. Do not use on Aluminum. If not sealed properly JSP Blak-Ox will oxidize the closest metals. We recommend that you double bag the bottle and store away from all metal materials. Handle with Care