XRF readings:
Lead: 11900 ppm · Cadmium: 0 ppm · Arsenic: 700 ppm
Verdict: Very high: avoid food contact
This Buckingham Palace Royal Birdsong English Fine Bone China: 11,900 ppm Lead. (We need to talk to the Queen about this!) tested at 11900 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. Arsenic reads 700 ppm, worth noting on top of the lead question.
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).