XRF readings:
Lead: 146700 ppm · Cadmium: 0 ppm · Arsenic: 0 ppm
Verdict: Extreme: do not use
This 1957-1969 Jewel by Lenox China – Made In USA: 146,700 ppm Lead in the glaze. 90 ppm is unsafe for kids. tested at 146700 ppm lead, heavily contaminated. If any of the lead is on the painted surface, decoration, or worn area, expect bioavailable exposure with food contact, mouthing, or abrasion.
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).