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What Is Glass Composed of

Glass is made of a mixture of minerals and each manufacturer has their own formula. Also the composition varies in accord with different intended uses. Basically, there are three main companents:

  • Formers (silicon oxide=sand). They are the "backbone" of the glass mix

  • Fluxes (i.e.sodium carbonate). These are necessary to lower the melting point of glass

  • Stabilizers. They lower the risk of corrosion of the glass (to some degree)

    There is an excellent article on the Dow Corning website explaining the composition of glass. Read it here