Well, if you are talking about Shining Wave 22K Bi Metal here is
what you g= et-
Composition: 8.3% 22K gold, 91.7% Sterling silver
Weight: 12.5% 22K gold, 87.5% Sterling silver The 22K layer is 1/8th
the volume, 1/12th of the thickness.
If you etch away much of the silver the metal will become very week.
The silver provides a strong backing so the object will hold its
From a design point of view I have always thought that the concept
of carving/engraving through the 22K to reveal the sterling was the
most interesting. The sterling would patina to black. The patina
would age and wear well becuse it would be protected by the
surrounding gold. Black and gold=8A not a bad look. Bill
Reactive Metals Studio, Inc.
PO Box 890 * 600 First North St. * Clarkdale, AZ 86324
Ph-928/634-3434 * Ph-800/876-3434 * Fax-928/634-6734