XRF readings:
Lead: 55000 ppm · Cadmium: 3783 ppm · Arsenic: 0 ppm
Verdict: Extreme: do not use + High cadmium
This “Orange Fiesta” pattern vintage Pyrex casserole dish with lid, 1971: 55,000 ppm Lead in the paint (90 ppm is unsafe for kids) tested at 55000 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 3783 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).