XRF readings:
Lead: 20300 ppm · Cadmium: 500 ppm · Arsenic: 0 ppm
Verdict: Very high: avoid food contact
This Vintage Corelle Plate With Maroon Flowers With Heart Petals: 20,300 ppm Lead [90 ppm is unsafe for kids] + Cadmium. tested at 20300 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. Cadmium reads 500 ppm, which is also flagged territory.
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).