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<p>[QUOTE=&quot;Blaubart, post: 1465012, member: 37498&quot;]I don&#039;t know what happened to this dime, but you can control the acid with tape.&nbsp; I&#039;ve done it before when frosting glass.&nbsp; One big difference though is smooth surface vs textured surface.&nbsp; I&#039;m not sure one would be able to get a good clean line along the uneven surface of the dime.</p><p><br /></p><p>What if it was suspended in a more fluid acid?</p><p><br /></p><p>I think you&#039;d be able to tell if you examined the coin closely.&nbsp; If it was taped, there would probably be some undercutting along the line where the acid ate up under the area that was protected by the tape.&nbsp; If it was suspended, it would probably taper the other way around due to evaporation of the acid over the time it took to eat away the cladding.</p><p><br /></p><p>Either way, interesting coin and it&#039;s fun to try and figure out what happened.[/QUOTE]</p><p><br /></p>

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