Feldspar play vital roles during firing as they are used as the main vitrifying or fluxing agent in ceramic bodies. Natural Bleach as the leader in industrial minerals, has unmatched mineralogical knowledge and can assist customers in ensuring that the proportions of feldspar in the body recipe are exactly right to avoid over vitrification during firing.  Feldspar Products we deal: Potash Feldspar Powder 200 Mesh , specific grade if any . Potash Feldspar Chips ( 0-5mm) – Standard & Premium Grade , specific size if any . Potash Feldspar Premium Grade Lumps