Glass can be made into two types, bottle and plate glasses. The process to make bottle and plate is quite similar. First, melt the materials such as soda, sand and limestone to the furnace. The temperature of the melting must be kept in a high temperature until the materials are brought to a state of perfect fusion. Second, the mixture is directed to each mould. To make a plate glass, the mixture is placed in a tank which has a hole in under so that the mixture can flow to the rollers. Finally, the rollers will flatten the mixture to form a plate glass. Meanwhile, to make a bottle glass, the mixture is flowed to the removable mould with an air pressure to push the mixture against the side of the mould. After the glass is formed, the mould will be removed.
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