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2016-04-14T17:44:43+05:30
Controlled heating of gypsum

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2016-04-14T17:53:54+05:30
Plaster of Paris is actually Gypsum Plaster. This is made by heating gypsum to about 300° F which is 150° C. 
When this dry plaster of Paris is mixed with water it reforms into Gypsum.
This is how Plaster of Paris is made.
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