Note 68 — Chapter XIX · LEAD AND ITS COMPOUNDS (continued 2)
Reading edition
By the term fritted lead is meant a compound of raw lead, silica, and boric acid, etc., fused together at a very high temperature. The product resembles glass in appearance, and is sparingly soluble in acids. It is this substance which, when pulverised and mixed with water and fine clay, can be used as a glaze for coating earthenware. (See p. 349.)