XRF Test Results for Natural Rubber “Tire-Free” Playground Mulch (Tinted) RainbowMulch.com.
Reading #1) Turquoise Colored Crumbles Copper (Cu): 149 +/- 32 ppm Zinc (Zn): 11,800 +/- 300 ppm Bromine (Br): 4 +/- 2 ppm Niobium (Nb): 210 +/- 19 ppm Indium (In): 13 +/- 7 ppm Iron (Fe): 1,807 +/- 165 ppm No other metals detected in consumer goods mode. Reading #2) Blue Colored Crumbles Cadmium…