Abstract:
Plaster of Paris , which is calcium sulphate with half modecule of water of crystallization (CsSO 4
1/2 H2O). It possesses outstanding property of setting and subsequent hardening when mixed with
water.
Plaster of paris is extensively used in ceramic industry for the preparation of models., moulds and
plaster toys. It is also used as a main raw materials in the manufacure of chalk crayons, gypsum
plaster boards, decorative picture frames besides a wide range of applications in the interior
decoration of buildings and other establishments.
