History of Technology in India, Vol. I: From Antiquity to c. 1200 A.D. v1.c16.s3.2

v1.c16.s3.2

Production of Glass involved two stages. In the first stage sand and crude natron were heated at a temperature of 750°C when they were converted into frit. In the second stage the frit was converted to glass by heating it in crucibles upto a temperature of around 1100°C, till glass had become homogenous and clear.