Need Some Info On Paper Notes - Coin Community Forum

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Author	Replies: 5 / Views: 1,665
john100 Pillar of the Community Canada 5324 Posts	Posted 09/30/2021 12:27 pm Is there anything like an XRF for coins, anything or process to find the composition of a paper bank note that is nondestructive Report this Post to the Staff

DBM Pillar of the Community Canada 9862 Posts	Posted 09/30/2021 4:59 pm Interesting! Why? "Dipping" is not considered cleaning... -from PCGS website Report this Post to the Staff
Coinfrog Bedrock of the Community United States 94367 Posts	Posted 09/30/2021 5:47 pm Yes, why indeed? Report this Post to the Staff
john100 Pillar of the Community Canada 5324 Posts	Posted 09/30/2021 7:21 pm Most of us knows about the BOC test run of the 5 dollar bird series GOGO notes which were printed on a Luminus substrate. I have some info that the BOC might have tested other denominations of the bird series note, since watching shows on xrays of priceless art, and forensic paper testing, one can surmise there is a method or equipment to nondestructive test a bank note. It would seem probable that the BOC at this time tested other colour notes of the bird series, as this was going to be the preferred substrate for the next series of bank notes. So this answers the why part, in today"s high tech world I assume there is some equipment out there that can answer this. Report this Post to the Staff
Sap Moderator Australia 16806 Posts	Posted 09/30/2021 8:38 pm XRF works well on heavy elements, like gold, lead etc, less well on lighter elements like aluminium, and virtually not at all on the super-lightweight elements like carbon, nitrogen and oxygen, that paper is made of. So unless this "Luminus substrate" incorporates heavy metals in the plastic or paper layers, it's unlikely to be useful for paper money. More useful would be infrared analysis. ATR-FT-IR (Attenuated Total Reflection Fourier Transform Infrared Spectroscopy) is a non-destructive technique which should be able to distinguish between a piece of paper and a piece of plastic coated in paper. Don't say "infinitely" when you mean "very"; otherwise, you'll have no word left when you want to talk about something really infinite. - C. S. Lewis Report this Post to the Staff
john100 Pillar of the Community Canada 5324 Posts	Posted 10/01/2021 01:25 am A very much thanks for the info, will let everyone know of the results Report this Post to the Staff
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