The diagram shows how plate glass and bottle glass are made.

The drawing illustrates the

process

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by which plate

glass

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and bottle

glass

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are manufactured. In summary, the

process

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involves three main stages in two

glass

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products. Especially, the initial stage of both processes is the same, which means both bottles and plates are made from the same materials.

At the first stage

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of the plate

glass

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process

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, there is a mixture of sand, soda, and lime is melted together in a furnace at 1700 degrees Celsius. Once they become molten

glass

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,

this

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mixture flows through piping to a tank. At the bottom of

this

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tank, there is a valve which the molten

glass

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comes out of that and

then

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goes through rollers. These rollers perform the function of straightening the

glass

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. For producing bottles, the liquid

glass

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comes out of the furnace and flows into the removable mould.

Similarly

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, compressed air is pumped into that mould to force the

glass

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onto the inside walls of the mould, leaving the rest of it completely empty. After the cooling

process

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, the mould can be removed.

Finally

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, the products are taken out for use.