This “Forbo, Marmoleum Click Cinch Loc, Welsh Moore, Panel” from Green Building Supply (pictured here) had the following readings when tested with an XRF Instrument:
Front surface of panel – reading one:
- Barium (Ba): 469 +/- 142 ppm
- Zinc (Zn): 2,019 +/- 47 ppm
- Iron (Fe): 9,823 +/- 156 ppm
- Titanium (Ti): 934 +/- 281 ppm
Front surface of panel – reading two:
- Barium (Ba): 338 +/- 129 ppm
- Zinc (Zn): 2,015 +/- 42 ppm
- Copper (Cu): 30 +/- 16 ppm
- Iron (Fe): 9,171 +/- 136 ppm
- Titanium (Ti): 1,270 +/- 261 ppm
Back cork surface of panel:
- Barium (Ba): 222 +/- 118 ppm
- Zinc (Zn): 13 +/- 7 ppm
- Iron (Fe): 50 +/- 18 ppm
- Note: due to the porous nature of the material the XRF instrument may be reading through from the back to the front in detecting these low levels, and it is possible the cork is Non-Detect for all (were it separated from the front surface of the tile.)
Tests results are science-based and replicable. All tests are done for a minimum of 60 seconds unless otherwise noted. Tests are repeated multiple times to confirm the results, using a freshly calibrated XRF instrument testing in consumer goods mode.
As always, thank you for reading and for sharing my posts.
Please let me me have any questions!
Tamara Rubin
#LeadSafeMama 
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