Since 1967. Women owned. For sterling with silver, silver plate, platinum, copper, gold, diamonds. Wipe, rinse & done. This solution is non-flammable. Fully guaranteed not to harm recommended metals when used as directed. See website for additional information. Money Back Guarantee: Tarn-X is guaranteed to perform to your complete satisfaction or return unused portion to place of purchase with receipt for a full refund of purchase price. www.jelmar.com.