XRF Test Result for Small (Single Serving Size) La Fermière Blue Glazed (Red Ceramic) Yogurt Crock (2024)

Quick note from Tamara Rubin:

This company has done an excellent job in sourcing Lead-free glaze for their yogurt cups! With multiple extended tests on different sections of the glazed areas, the cup registered as “Lead-Free” (non-detect for Lead, with the limits of detection of the XRF instrument), even though the bare red clay of the cup tested positive for traces of Lead. What this means is that even though there is some Lead (at a level that is typical and considered safe by all standards) in the clay substrate of this yogurt crock, the blue glaze covers it with a thick enough layer of lead-free material that the XRF instrument cannot detect any Lead from the substrate through the glaze.

Full XRF test results for this ceramic yogurt cup can be found below. 

For those new to the Lead Safe Mama website:

Tamara Rubin is a multiple-federal-award-winning independent advocate for childhood Lead poisoning prevention and consumer goods safety, and a documentary filmmaker. She is also a mother of Lead-poisoned children (two of her four sons were acutely Lead-poisoned in 2005).

• Tamara owns and runs Lead Safe Mama, LLC — a unique community collaborative woman-owned small business for childhood Lead poisoning prevention and consumer goods safety.
• Since July 2022, the work of Lead Safe Mama, LLC has been responsible for six product recalls (FDA and CPSC).
• All test results reported on this website are science-based, accurate, and replicable.
• Please check out our press page to see some of the news coverage of our work, linked here.

Published: November 8, 2024

Reading Set #1) Blue Glazed Area
120-second reading
Repeated multiple times to confirm the results

• Lead (Pb): non-detect
• Cadmium (Cd): non-detect
• Mercury (Hg): non-detect
• Arsenic (As): non-detect
• Bromine (Br): non-detect
• Chromium (Cr): 1,411 +/- 443 ppm
• Vanadium (V): 7,404 +/- 1,377 ppm
• Manganese (Mn): 1,444 +/- 271 ppm
• Iron (Fe): 932 +/- 162 ppm
• Cobalt (Co): 3,732 +/- 182 ppm
• Copper (Cu): 527 +/- 53 ppm
• Zinc (Zn): 19,500 +/- 500 ppm
• Titanium (Ti): 25,200 +/- 2,600 ppm
• Zirconium (Zr): 39,100 +/- 1,000 ppm
• Barium (Ba): 11,600 +/- 400 ppm
• Platinum (Pt): 382 +/- 81 ppm
• No other metals detected in consumer goods mode.

Reading Set #2) Exposed Red Clay on Bottom of Cup
120-second reading
Repeated multiple times to confirm the results

• Lead (Pb): 35 +/- 8 ppm
• Cadmium (Cd): non-detect
• Mercury (Hg): non-detect
• Arsenic (As): non-detect
• Bromine (Br): non-detect
• Chromium (Cr): non-detect
• Manganese (Mn): 349 +/- 120 ppm
• Iron (Fe): 52,400 +/- 800 ppm
• Copper (Cu): 30 +/- 19 ppm
• Zinc (Zn): 147 +/- 16 ppm
• Zirconium (Zr): 324 +/- 9 ppm
• Indium (In): 8 +/- 5 ppm
• Barium (Ba): 1,687 +/- 44 ppm
• Platinum (Pt): 89 +/- 26 ppm
• Bismuth (Bi): 61 +/- 8 ppm
• No other metals detected in consumer goods mode.