Sunday, March 2, 2008

Simple Way to Make a 'GLASS' (TASK 3)

Do you know a glass, we usually use as a window, bottle, etc., is made by a very simple steps even in a traditional home industry? The main substances to produce glass is just a combination of sand, soda and limestone. First, we mixed these three materials into a big furnace with temperature controller. Then we turn on the furnace in order to produce a perfect solution of the substances. After that, this solution is separated into two flows depend on the shape of the glass we'll produce later. A plate glass, we usually use as a mirror, window,etc., is made by flowing the mixed solution into a system of rolling pin, used for thin the raw glass, as the temperature decreases. As a result, after the temperature become room temperature or a little bit higher, we'll get a ready-to-use plate glass. Different from the first one, a bottle glass is more complex to be made. We must pour the solution into some removable mould with specific shape we have choosed, and add some air in order to give pressure to compress the glass. If the glass has became cool and hard enough, the mould is then released and the bottle glass can be used.

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