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<p>[QUOTE=&quot;Conder101, post: 2758875, member: 66&quot;]Mercury, being a liquid metal, has a tendency to act as a &quot;solvent&quot; and dissolve other metals forming an amalgam.&nbsp; So when applied to a coin such as a cent it &quot;coats&quot; the surface with a silver colored amalgam of mercury and copper.&nbsp; This used to be used to gold or silver &quot;plate&quot; objects back before electroplating.&nbsp; A mercury/gold or mercury/silver amalgam would be rubbed on a metal object.&nbsp; The mercury would also bond to the object coating it with the amalgam.&nbsp; Then it would be heated to drive off the mercury leaving a thin layer of gold or silver behind.[/QUOTE]</p><p><br /></p>

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