- NEW DVD Series – Stone Setting with Bezels
- Tube Set Charm by Kim St. Jean
- Prong Basket Pendant by Kim St. Jean
- NEW DVD Series – Stone Setting with Cold Connections
- New DVD Series – Stone Setting with Wire
- NEW DVD Series: Introduction to Stone Setting by Kim St. Jean
- Featured Tool: Bracelet Bending Plier
- NEW Dvd by Eva Sherman
- Fun, Fast Fold Forming DVD Series
- Double Band Ear Cuff from Alex Simkin
Daily Wire Tip Oct. 3: The Sterling Silver Tarnish Culprit
Daily Wire Jewelry Making Tip for
October 3, 2010
In one recent Tip of the Day, you said “without the presence of an alloy such as copper, fine silver will not tarnish.” So it’s the alloy that causes silver to tarnish?
-Julia in Honesdale, Pennsylvania
Yes, sterling silver is composed of 92.5% silver and the most common alloy added is 7.5% copper. Copper tarnish is composed of CuO, otherwise known as oxidation when moisture is present in the air.
When there are also acids present in the air, along with carbon dioxide (such as pollution) a greenish tarnish/patina occurs, which can be seen on landmarks like the Statue of Liberty.
Answer contributed by Dale “Cougar” Armstrong
Have a question? Submit your question here