When this newer modern white Fiestaware tea cup (purchased c. October 2014) was tested with an XRF instrument it had the following reading:
- Lead (Pb): 40 +/- 14 ppm
The amount of lead considered unsafe in items intended for children is 90 ppm lead or higher in the paint or coating or 100 ppm or higher in the substrate. As a result, this cup WOULD be considered lead-safe by all available standards, even though technically there is not a a standard for total lead content in modern dishware when using an XRF for testing.
I would consider this cup almost Lead-free / but not quite! The company probably did leach testing and it did not leach any Lead. At this level the Lead is a trace contaminant and not an additive (or intentional ingredient) to the glaze or clay. I would feel comfortable drinking out of this cup if I visited your home, but would not choose to own Fiestaware personally.
Here’s a link to this exact cup on Amazon* if you are interested in purchasing it: https://amzn.to/2CKjX8Q
As always, please let me know if you have any questions.
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*Amazon links are affiliate links. If you purchase something after clicking on one of my links I may receive a small percentage of what you spend at no extra cost to you. Thank you for supporting my advocacy work in this way.