ROVIN CERAMICS 801 (gloss) and RA (satin) are lead free and barium free. These economical base glazes will fit RO-10, RO-20, RO-30 and RO-30S. Add colorants, such as mason stains or oxides to achieve an unlimited palette. ROVIN CERAMICS RA satin has a very appealing buttery finish, while ROVIN CERAMICS 801 has a brilliant gloss finish. Wear a NIOSH approved mask when pouring dry materials from one container to another.