Uses:  It is chemical used for making ceramics. Glazes, cements, wicks, food preservative, special glasses; also for leather dressing compounds for pretaration of hides prior to tanning; artificial precious stones; as flux in metallurgical industry, fire- proofing compositions and linings for safes; also for pogments; enmel paints, paper glazes, cosmetics, soaps, textiles, medicines, etc.