"Glass is arguably the most remarkable material ever discovered by man. Made from the melting and cooling of the earth’s most abundant material … It has given us the lens, the bottle, the fiber optic cable, fabrics, and the window"
Michael Wigginton, Glass in Architecture12
The basic ingredients of glass have not changed in some five millennia, since it was first made in the Middle East for decoration and jewelry. Its first use in China dates to about 5000 BC. The basic ingredients of glass are:
The sodium bicarbonate lowers the melting point of silica from 4,172°F to 2,732°F, and the lime, along with magnesium oxide (MgO) and aluminum ...