Glass is 100% recyclable- it can be recycled over and over again with no reduction in quality. Used glass jars and bottles are crushed and added to the base mixture. Crushed glass is known as cullet. By using cullet instead of raw materials more than 1.1 tonnes of raw materials are conserved for every tonne of cullet used. Manufacturers can even use up to 100% cullet to make new glass containers.
Making glass is a very simple process. Some of the ingredients used to make glass are silica sand, soda ash, and limestone. These ingredients are combined and melted at 1500oC. The molten glass is rapidly formed into jars and bottles.
Recycled glass melts at a lower temperature than virgin materials. This results in enormous energy savings for the environment and saves the company money. For each 10% increase in the amount of cullet used in the process the melting point is reduced by approximately 2.5%.
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