Was surprised to see them say it can fool XRF
Chinese fake gold using tungsten
- Thread starter Golden Stash
- Start date
My understanding of an XRF is that identifies all the quantities of all metals no matter where it is in the bar . Complex mixtures can cause confusion in an XRF apparently.
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I think that XRF can only go about 0.5mm deep, but this is enough to cover most plating techniques.
XRF surface penetration depends on a number factors, one of which is metal density. The more dense the metal, the lower the penetration. 999 pm may be limited to just a few microns. 10 - 15 microns = .0.01mm - 0.015mm. whereas 9 carat gold, being less dense due to other metals in the mix may alow for deeper penetration.
I now wonder how much PM Is out there that XRF has tested FALSELY?
Apparently Sigma PMVs (Pro and Investor) penetrate a lot deeper.
Great topic.
Food for thought!
E&OE
DYOR
Sigma pro measures through the metal.
Geez , I thought the XRF was the best but you do have to wonder what is out there in the market if it is not completely accurate.
Geez , I thought the XRF was the best but you do have to wonder what is out there in the market if it is not completely accurate.