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<p>[QUOTE=&quot;BadThad, post: 1637002, member: 17261&quot;]If that level of service is chosen by the owner (secure plus), there is a chance their insturment would detect the polymer layer if it&#039;s LOD is sufficient and VC is in their library. PCGS uses an FTIR ATR. ATR greatly reduces the signal strenth - meaning their lower limit of detection is reduced compared to more traditional IR techniques. I use a diamond ATR equipped IR at work daily and it&#039;s great for a quick scan but when I want the highest quality scan I&#039;ll make a KBr pellet, use salt plates or a liquid flowcell.....I digress..... IMO, if the polymer layer was rinsed off the coin with water, it would be undetectable on their insturment. Of course I cannot guarantee that but it&#039;s my opinion as an analytical chemist.[/QUOTE]</p><p><br /></p>

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