This “Forbo, Marmoleum Striato, 5218 Welsh Moore, Glue Down” flooring sample from Green Building Supply (pictured here) had the following readings when tested with an XRF Instrument:
Front surface of panel:
- Barium (Ba): 216 +/- 134 ppm
- Bromine (Br): 9 +/- 3 ppm
- Zinc (Zn): 2,193 +/- 49 ppm
- Copper (Cu): 34 +/- 17 ppm
- Iron (Fe): 11,600 +/- 200 ppm
- Titanium (Ti): 1,683 +/- 274 ppm
Back burlap surface of panel:
- Barium (Ba): 325 +/- 140 ppm
- Bromine (Br): 7 +/- 3 ppm
- Zinc (Zn): 1,629 +/- 41 ppm
- Iron (Fe): 9,554 +/- 154 ppm
- Titanium (Ti): 542 +/- 267 ppm
- Note: due to the porous nature of the material the XRF instrument is likely reading through from the back to the front in detecting the levels found in this reading set, and I expect that the burlap on this side would otherwise be very low or 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 
Great news! We laid Marmoleum in our renovated kitchen just last summer.