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<p>[QUOTE=&quot;Valentinian, post: 3027002, member: 44316&quot;]In <i>Methods of Chemical and Metallurgical Investigation of Anicent Coinage</i> Lawrence Cope writes in the article &quot;Surface-silvered ancient coins&quot; that &quot;... set out to positively whether the coatings were silver or tin.... revealed beyond any measure of doubt that all the coins were coated with silver.&quot;</p><p><br /></p><p>In <i>Metallurgy in Numismatics</i>, volume 3, in the article &quot;Technology of silver-plated coin forgeries,&quot; Susan la Niece notes, after discussing other ways to put silver on the surface, that &quot;tinning is a very simple process... [and] is commonly found on coin forgeries&nbsp; ... from the Roman period onwards.&quot; </p><p><br /></p><p>I have, myself, participated in a high-tech study of surface-silvering on some &quot;XI&quot; and &quot;XXI&quot; coins of Tacitus and the tetrarchy and we found the &quot;surface-silvering&quot; actually was good silver.[/QUOTE]</p><p><br /></p>

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