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<p>[QUOTE="John Bull, post: 7699370, member: 121311"]Fakes / counterfeits fascinate me. Not just coins but all collectables, be it antiques, magic the gathering cards (a black lotus card recently sold for $500k) or anything really.</p><p><br /></p><p>I was just reading an article on an EDM'd coin die. (<a href="https://coinweek.com/counterfeits/counterfeit-coin-detection-spark-erosion-1874-three-cent-nickel-die-trial/" target="_blank" class="externalLink ProxyLink" data-proxy-href="https://coinweek.com/counterfeits/counterfeit-coin-detection-spark-erosion-1874-three-cent-nickel-die-trial/" rel="nofollow">https://coinweek.com/counterfeits/counterfeit-coin-detection-spark-erosion-1874-three-cent-nickel-die-trial/</a>) </p><p>And it makes you wonder just how many super fakes are out there.</p><p><br /></p><p>If the counterfeiter had made a scan of the coin cleaned it up in a 3d modelling software like ZBrush and then CNC'd a replica in ultrafine graphite you may not have been able to tell. </p><p>( <a href="https://basilica.com/blog/graphite-milling-101" target="_blank" class="externalLink ProxyLink" data-proxy-href="https://basilica.com/blog/graphite-milling-101" rel="nofollow">https://basilica.com/blog/graphite-milling-101</a> ) explains in better than I could.</p><p><br /></p><p>Then you get on to ancients, which it's a whole another level of possibilities for perfect fakes. Using modern technologies.</p><p><br /></p><p>People say you can spot fakes in ancients because counterfeiters fail to master the style of the die cutters... I give you... Generative Adversarial Networks. </p><p>(<a href="https://machinelearningmastery.com/impressive-applications-of-generative-adversarial-networks/" target="_blank" class="externalLink ProxyLink" data-proxy-href="https://machinelearningmastery.com/impressive-applications-of-generative-adversarial-networks/" rel="nofollow">https://machinelearningmastery.com/impressive-applications-of-generative-adversarial-networks/</a>) </p><p><br /></p><p>Mr counterfeiter takes as many black and white photos of a certain coin from a certain timeframe at certain mint from auction catalogues to reference books to wherever. He puts them into a GAN until he has multiple photos for which imitates the look and feel of the period.</p><p><br /></p><p>He builds up a copy in a 3d modelling software flips it around to create a model of the die. Then 3d prints the model in lossless resin and casts the die in bronze.</p><p><br /></p><p>The guy in the video below makes jewelry in a similar way. As you can see this is from a hobby 3d printer, spend thousands instead of hundreds like some of the jewelry designers do on resin 3d printers and the detail is incredible.</p><p>[MEDIA=youtube]xNipIFMKta4[/MEDIA]</p><p><br /></p><p>Problem with a super fake is by its very nature it's unlikely to be spotted. </p><p><br /></p><p>Where do you see counterfeit detection going?[/QUOTE]</p><p><br /></p>
[QUOTE="John Bull, post: 7699370, member: 121311"]Fakes / counterfeits fascinate me. Not just coins but all collectables, be it antiques, magic the gathering cards (a black lotus card recently sold for $500k) or anything really. I was just reading an article on an EDM'd coin die. ([URL]https://coinweek.com/counterfeits/counterfeit-coin-detection-spark-erosion-1874-three-cent-nickel-die-trial/[/URL]) And it makes you wonder just how many super fakes are out there. If the counterfeiter had made a scan of the coin cleaned it up in a 3d modelling software like ZBrush and then CNC'd a replica in ultrafine graphite you may not have been able to tell. ( [URL]https://basilica.com/blog/graphite-milling-101[/URL] ) explains in better than I could. Then you get on to ancients, which it's a whole another level of possibilities for perfect fakes. Using modern technologies. People say you can spot fakes in ancients because counterfeiters fail to master the style of the die cutters... I give you... Generative Adversarial Networks. ([URL]https://machinelearningmastery.com/impressive-applications-of-generative-adversarial-networks/[/URL]) Mr counterfeiter takes as many black and white photos of a certain coin from a certain timeframe at certain mint from auction catalogues to reference books to wherever. He puts them into a GAN until he has multiple photos for which imitates the look and feel of the period. He builds up a copy in a 3d modelling software flips it around to create a model of the die. Then 3d prints the model in lossless resin and casts the die in bronze. The guy in the video below makes jewelry in a similar way. As you can see this is from a hobby 3d printer, spend thousands instead of hundreds like some of the jewelry designers do on resin 3d printers and the detail is incredible. [MEDIA=youtube]xNipIFMKta4[/MEDIA] Problem with a super fake is by its very nature it's unlikely to be spotted. Where do you see counterfeit detection going?[/QUOTE]
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