Iridium Powder (hardening agent for gold and platinum alloy) 1.Purity:99.95% 2.Particle size:200mesh 3.Brand:JM,Heraeus,Anglo Product Description: Iridium PowderPurity:99.95%Particle size:200meshColor:dark grey powderBrand:JM,Heraeus,AngloPacking:100g,250,500g,1000g,2000g per vacuum and sealed plastic bagUsage of iridium powder: (1),It is mainly used as a hardening agent in platinum alloys. (2), ...