This vintage milk-glass “Made in USA” Corning brand tea cup tested positive for lead when tested with an XRF instrument at 804 ppm lead in the white (undecorated) milk glass component of the cup.
Tested in 2014.
In 2018 the amount of lead that is considered toxic in a modern/newly manufactured item intended for children is 90 ppm lead (or higher) in the coating or 100 ppm (or higher) in the substrate. Dishware is not considered to be an “item intended for children” (even newly made china and mugs that are manufactured in the United States) and, as such, is not regulated for total lead content as tested/detectable with an XRF instrument. Here’s a recent article about lead in glassware.
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Mother of Lead Poisoned Children
Trained and Certified in using an XRF instrument.