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<p>[QUOTE=&quot;Conder101, post: 404263, member: 66&quot;]Since the strip was plated before blanking we can treat the zinc as two layers of metal 2 ten thousandths of an inch thick and 19mm in diameter&nbsp; if you work the math you get .000446 cubic centimeters of zinc.&nbsp; Zinc weighs about 7.5 grams per cc (working from memory on the density of the zinc.)&nbsp; so the weight of the zinc on the coin would be .0033 grams&nbsp; (This seems reasonable since previous calculations I have made on the weight of the copper plating of current cents has been in the .005 gram range.)&nbsp; So that would give a percentage of the zinc at .1%&nbsp; 99.9 % steel.</p><p><br /></p><p><br /></p><p>It isn&#039;t on the edges&nbsp;&nbsp; Look at the edges of an AU or Unc steel cent and you can clearly see the different metal layers.[/QUOTE]</p><p><br /></p>

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