White center of dish:
White center of dish:- Barium (Ba): 14,000 +/- 800 ppm
- Zinc (Zn): 17,200 +/- 700 ppm
- Iron (Fe): 655 +/- 172 ppm
- Bismuth (Bi): 93 +/- 44 ppm
Blue edge of dish:
- Barium (Ba): 9,478 +/- 668 ppm
- Tin (Sn): 265 +/- 71 ppm
- Zinc (Zn): 13,800 +/- 600 ppm
- Iron (Fe): 898 +/- 184 ppm
- Bismuth (Bi): 103 +/- 44 ppm
The back mark (logo on the back side of the dish) also tested similarly to the results above (negative for Lead, Mercury, Cadmium, Arsenic and Antimony.)
I just recently read about lead in vintage ceramics and started researching my brick oven stoneware set that I have been using for 2 years. I am very concerned now but I came across this test of yours. My brick oven stoneware has a different pattern of various colored flowers around the ceramics as well as in the middle of each plate/bowl. The back has the logo but instead of Tuan Guan China, it says made in China. How do I know if the different colors have lead or if your test concludes that this brand does not contain lead? I have a baby and we have been using this as a family for 2 years. Please advise. Thank you! Annie