Describe the valcanisation of rubber. 
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Vulcanization :- “The process which involves addition of sulphur or H2S to crude (raw) natural rubber at high temp & pressure to improve properties of crude natural rubber is called vulcanization.” 

Most of all the processes of vulcanization is addition of „sulphur‟. Heating the raw rubber with sulphur to a high temperature, sulphur combines chemically at double bonds in the rubber molecule of different rubber springs.

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