The glass may be given any of the following treatment:
(1) Blending
(2) Cutting
(3) Opaque making
(4) Silvering.
(1) Bending: The glass may be bent into desired shape by placing it in ovens in which the temperature can be regulated. The glass in the form of rods, sheets or tubes is placed in such ovens and heated. It is then bent when it is suitably heated.
(2) Cutting: The glass is cut in required sizes with the help of diamond or rough glasses or small wheels of hardened steel.
(3) Opaque making: The glass can also be made opaque or impervious to light. It is done by grinding the glass surface with emery. It can also be achieved chemically by the application of hydrofluoric acid.
(4) Silvering: This process consists in applying a very thin coat of tin on the surface of glass. The silver is deposited on this layer of tin. A suitable paint is then applied to give protection against the atmospheric effects.