Perfect for everyday use in the retail store or repair shop. this concentrated formula was created for cleaning diamonds, precious metals (gold, silver, platinum), copper and brass. Reduce to a 2-20% concentration. Contains no chelating agents. Moderately alkaline; best suited for cleaning plain or stone-set rings (do not use on delicate stones). Effective usage in an ultrasonic cleaner (up to 160°F), or at room temperature for hand brushing. Can also be used for immersion or soak cleaning.