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<p>[QUOTE=&quot;Colonialjohn, post: 2133735, member: 57741&quot;]For people that test coins with SEM/EDS weekly like myself in the lab almost all contain sulfur and chlorine on the coin&#039;s surface. W. Weimer explains sulfur well enough in Coin Chemistry. The chlorine from NaCL (salt) in the moisture in air. How does one attach a photo from your desktop on this forum. Perhaps a SEM/EDS posted example will help.</p><p><br /></p><p>JPL[/QUOTE]</p><p><br /></p>

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