Friday, June 20, 2008

Plaster of Paris

http://en.wikipedia.org/wiki/Plaster

Plaster of Paris, or simply plaster, is a type of building material based on calcium sulfate hemihydrate, nominally CaSO4·0.5H2O. It is created by heating gypsum to about 150 °C.

2 CaSO4·2H2O → 2 CaSO4·0.5H2O + 3 H2O (released as steam).

do not use Calcium Hydroxide in place because it causes irritation of the eyes among others.

http://en.wikipedia.org/wiki/Calcium_hydroxide

No comments: