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<p>[QUOTE=&quot;Suarez, post: 4838629, member: 99239&quot;]I agree with this. There is no current tech that can replicate the level of detail from a coin simply by copying the contours of another. A high end CNC has a precision of about 0.3mm (I could be wrong here but probably not by THAT much). There is another process that I think is even more accurate, <a href="https://en.wikipedia.org/wiki/Electrical_discharge_machining" target="_blank" class="externalLink ProxyLink" data-proxy-href="https://en.wikipedia.org/wiki/Electrical_discharge_machining" rel="nofollow">EDM</a>, which I believe has a maximum accuracy of 0.1mm. Maybe we could talk about electroplating which yields a foil negative that is fairly accurate but I think it&#039;s in the order of 0.1mm too. None of the electroplated samples I remember seeing stood out as especially convincing - and never mind that this process has a very limited &quot;palette&quot; of materials.</p><p><br /></p><p>In any case, on a coin a 0.1mm margin of error stands out like a sore thumb. The unaided eye can make out details just 0.04mm apart. A coin sculpted at 0.1mm would look like a cartoon of the original. The &quot;troughs and peaks&quot; of flow metal are probably on the order of 10μm - much smaller than the diameter of a hair but still easily distinguishable when you rotate a coin in light. There is no metallurgical process that can tackle this. None, at least, that are used commercially.</p><p><br /></p><p>Maybe if they adapted the stylus of a tunneling electron microscope the data could be encoded to make a near-perfect reproduction of a coin&#039;s surface but that&#039;s still only one half the puzzle. How do you reproduce that level of detail? Maybe vapor deposition? Molten metal inkjet printers??</p><p><br /></p><p>Please someone fact-check me. It&#039;s late and I&#039;m probably missing something important :-D</p><p><br /></p><p>Rasiel[/QUOTE]</p><p><br /></p>

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