Lead Free Ceramic Tile

New 2018 Made in USA American Olean Clean White Ceramic Subway Tile. When tested with an XRF instrument this white ceramic subway style tile had the following readings. Shiny Glazed Surface: (If a metal is not listed it was not detected): Zinc (Zn): 48,000 +/- 1,300 ppm Copper (Cu): 340 +/- 58 ppm Iron (Fe):…