Saturday, March 29, 2008

The Making Process of Glass

The making process of glass consists of several steps. First, the materials, which are sand, flint, spar, and some other silicious substances, with one or other of the fixed alkalies, have to be transformed into powder. Second, these materials are to be melted together in a calcining furnace at temperatures of 1700° C. While being heat, these materials have to be stirred. The materials, which are taken out from this process, are called frit. Frit can be easily transformed into glass by vitrifying it in a pot. It requires a small amount of flux to produce a fine glass. The flux can correct the false that was made by the heating pot. Until the glass is perfectly melted, the heat must be maintained stable. When the glass is still molten, it can be manipulated into any kind of shape you wish for. Third, is to form the glass into a certain shape. To make a bottle, the glass can be put into a removable mould and blown up. The glass will be cool and hardened by the air. On the other hand, to make a plate, the glass will be sent into a pressing machine, which will press the glass and shape it into a certain form. In the end, the glass can be manipulated in order to satisfy the consumer’s demands. It can be engraved, colored, and decorated by some kind of materials.

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