Making Glasses

There are some steps to make glass. The first step is gathering the main ingredients such as silica (SiO2) which we can get in the form of sand, then soda (Na2CO3) and limestone (CaO). Second step is mixing the ingredients in a furnace. The third step is heating the furnace until the furnace reaches a temperature of approximately 1,500°C. After being molten, the molten glass can be formed into two form.
The first form is plate glass. The molten glass is poured into a melting pot, then the molten glass will flow through some rollers, so we can get the thickness we want.
The second form is bottle glass. The molten glass is poured into a removable mould. Then air is blown from a blowpipe into the mould. The molten glass will follows the shape of the removable mould and forms the bottle glass shape.
Then the plate glass or the bottle glass is cooled down until it gets it's solid form.

Ari Purnomo Murniadi
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