adding definition

Liver of Sulfur is a poorly defined mixture of potassium sulfide, potassium polysulfide, potassium thiosulfate, and probably potassium bisulfide. Synonyms include hepar sulfuris, sulfur, sulfurated potash and sulfurated potassa.  Liver of sulfur is mainly used in metalworking as an oxidizing agent to form a patina which can easily be removed from raised areas by polishing or buffing.  86,95,70,0,B