Negative ion powder ndi mtundu wa mchere womwe umapangidwa mwaluso kapena wogawanika ndi anthu pogwiritsa ntchito mfundo yopangira ma ion oipa m'chilengedwe.Nthawi zambiri ndi tourmaline ufa + lanthanide zinthu kapena zosowa zapadziko lapansi.Gawo la zinthu zapadziko lapansi losowa kwambiri ndilokulirapo kuposa la ufa wa tourmaline ndi zinthu zapadziko lapansi.Adawerengedwa kuposa 60%.

Ufa wathu woipa wa ion ukhoza kutulutsa ma ion negative ndi ma infrared ray.thanzi ndi chilengedwe.