Handmade ceramic mug with white, blue & brown glaze: 39 ppm Lead in the substrate & 23 ppm on the food surface (safe by all standards).
Reading #1) Unglazed white base-clay of mug
60-second reading
- Lead (Pb): 39 +/- 4 ppm
- Cadmium (Cd): 5 +/- 2 ppm
- Mercury (Hg): non-detect
- Bromine (Br): non-detect
- Chromium (Cr): non-detect
- Iron (Fe): 3,910 +/ 84 ppm
- Zinc (Zn): 212 +/- 9 ppm
- Titanium (Ti): 2,629 +/- 442 ppm
- Indium (In): 5 +/- 2 ppm
- Tin (Sn): 24 +/- 3 ppm
- Barium (Ba): 50 +/- 11 ppm
- Platinum (Pt): 24 +/- 11 ppm
- No other metals detected in consumer goods mode.
Reading #2) Blue glaze of mug
60-second reading
- Chromium (Cr): 247 +/- 63 ppm
- Iron (Fe): 7,169 +/ 96 ppm
- Zinc (Zn): 9,294 +/- 91 ppm
- Titanium (Ti): 1,968 +/- 251 ppm
- Tin (Sn): 7,040 +/- 60 ppm
- Barium (Ba): 12,300 +/- 100 ppm
- No other metals detected in consumer goods mode.
Reading #3) Brown glaze of mug
60-second reading
- Lead (Pb): 16 +/- 4 ppm
- Cadmium (Cd): 56 +/- 3 ppm
- Chromium (Cr): 331 +/- 112 ppm
- Manganese (Mn): 5,182 +/- 137 ppm
- Iron (Fe): 11,600 +/ 200 ppm
- Cobalt (Co): 1,298 +/- 53 ppm
- Zinc (Zn): 19,900 +/- 200 ppm
- Titanium (Ti): 33,800 +/- 800 ppm
- Zirconium (Zr): 263 +/- 5 ppm
- Indium (In): 27 +/- 4 ppm
- Tin (Sn): 5,079 +/- 63 ppm
- Barium (Ba): 2,248 +/- 38 ppm
- No other metals detected in consumer goods mode.
Reading #4) White glaze of mug
60-second reading
- Lead (Pb): 23 +/- 3 ppm
- Iron (Fe): 11,100 +/ 200 ppm
- Copper (Cu): 21 +/- 9 ppm
- Zinc (Zn): 670 +/- 18 ppm
- Zirconium (Zr): 233 +/- 5 ppm
- Indium (In): 5 +/- 3 ppm
- Tin (Sn): 5 +/- 3 ppm
- Barium (Ba): 47 +/- 12 ppm
- No other metals detected in consumer goods mode.
For those new to this website:
Tamara Rubin is a Federal-award-winning independent advocate for consumer goods safety and a documentary filmmaker. She is also a mother of Lead-poisoned children. Tamara’s sons were acutely Lead-poisoned in August of 2005. She began testing consumer goods for toxicants in 2009 and was the parent-advocate responsible for finding Lead in the popular fidget spinner toys in 2017. Tamara uses XRF testing (a scientific method used by the U.S. Consumer Product Safety Commission) to test consumer goods for toxicants (specifically heavy metals), including Lead, Cadmium, Mercury, Antimony and Arsenic. All test results reported on this website are science-based, accurate and replicable. Items are tested multiple times to confirm the test results for each component tested. Please click through to this link to learn more about the testing methodology used for the test results discussed and reported on this website.
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Do you know where this is from?
I can find out.
I purchased one of these in Maine. I believe its a company from the East Coast however I do not know their name!
We’re you ever able to find out where this mug is from?
Hi Tamara,
It seems like several of the “modern handmade” items you’ve tested are very safe. I’m wondering if you have done any research on the types of glazes that are being sold nowadays? Should ceramics made in the US in the past 10 years generally be safe, or do we need to know what specific type of glaze was used?
Thanks so much!
Hello,
I just discovered your website. I have one of these mugs, and it comes from a company called “Clay in Motion” and is called a “hand warmer” mug. I also have bought several of these as gifts, so am interested in making sure they are safe. Just thought I’d comment here, as it looks like the company says this is lead free.