Message:

<p>[QUOTE=&quot;Pandacollector, post: 986123, member: 26583&quot;]I hesitate to wander in here with my long-ago college chem background, but all the discussion is about gold while the original paper attributes red spots to a reaction of silver and sulfur. &quot;Accelerated tarnish test of gold in an atmosphere containing sulfur&nbsp; compound proves that the similar phenomenon appears when a small amount&nbsp; of silver is present on the surface of gold. It can be concluded that&nbsp; the occurrence of tarnish stains is caused by the presence of Ag and S.&quot;</p><p><br /></p><p>It seems crucial that collectors recognize that exposure to sulfur contaminants in the atmosphere (or most paper and cardboard) can alter a gold coin&#039;s appearance. I&#039;ve used Air-Tite containers for a few years with satisfactory results. I wonder, what strategies others are using to keep air away from their coins?</p><p><br /></p><p>Best wishes,</p><p>Peter Anthony</p><p><a href="http://wwww.pandacollector.com" target="_blank" class="externalLink ProxyLink" data-proxy-href="http://wwww.pandacollector.com" rel="nofollow">wwww.pandacollector.com</a>[/QUOTE]</p><p><br /></p>

Your name or email address:

Do you already have an account?

• No, create an account now.
• Yes, my password is:
• Forgot your password?

Stay logged in