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How flat glass for windows is made
Two children meet Curious Cat, an animated cat who asks them if they would like to find out how glass is made. They take a trip to a glass making factory to discover how big panes of glass are made. They start off learning that glass is made from raw materials such as sand, soda ash and limestone. The different stages and processes involved in making a flat pane of glass are seen, including the float glass process, which makes the molten glass flat and smooth. This is demonstrated in a laboratory using oil and water. The children watch the raw material go in one end of the process and finish by watching the glass being cut into different sizes. First broadcast on BBC Learning Zone in March 2012 as part of the series Curious Cat's Science.
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