Infrared Wavelength scope:3um-15um. Partical size:20nm. Far infrared emissivity :0.87~0.91. Package:25 kg per bag. Application of nano far infrared ceramic powder: *It is widely used in cosmetics, health products, manufacture of ceramics, paper, wood, medical, beauty, health supplies, home supplies, bedding, automotive supplies, cleaning supplies, sports health class, cold boxes, crisper , ...