Purity Zinc Metals Announces UltraPure® Brand UltraPure® Brand meets the new ASTM D520 Type III specification for zinc dust pigment adopted in April 2000 by the American Society of Testing Materials. The new Type III substantially reduces allowable lead and cadmium. American Society of Testing and Materials adopts New D520 Type III Specification for Zinc Dust Pigment Effective April 2000, the new Type III specification substantially reduces allowable lead and cadmium.
	Report R079 for Steel Structures Painting Council Worker Exposure to Lead and Cadmium During Abrasive Blasting of Inorganic Zinc Rich Coatings