XRF readings:
Lead: 3003 ppm · Cadmium: 0 ppm · Arsenic: 0 ppm
Verdict: High: FluoroSpec test required
This My original letter to the makers of the Green Sprouts sippy cup, following my findings of Lead paint on their glass insert. tested at 3003 ppm lead, significantly elevated. The bioavailability question (can this lead reach a person?) depends on whether the lead is locked into a fired matrix or sitting on a painted surface.
What this XRF reading actually means →
XRF measures lead presence on the surface. It does not measure whether that lead can reach a person. That distinction matters for how you should react to this number. Read the full primer.
Test your own dishes with FluoroSpec →
Source: EverythingLead · Test method: XRF (Niton XL 5 Plus, 1.5 sigma)
License: Verdict and methodology © EverythingLead, CC-BY-SA 4.0. Factual XRF measurements are not copyrightable (Feist v. Rural Tel., 499 U.S. 340).