... , curing 2. flexible to top coat, good thermal stability superfine zinc phosphate powder 1.Property:As a white coloring pigment, it ... :With low heavy metal, good thermal stabilityand excellent rust prevention, zinc phosphate is nontoxic,environment-friendly, not irritative to skin and ... -3015Hg ppmā¤10.006Pb ppm 30-20050As ppm10-3010 superfine zinc phosphate powder