GOYAL LIME brings forth one of its products, Plaster of Paris (P.O.P.) developed using world's best Gypsum (Bikaner, Rajasthan) with IS- 2547 (ISI Mark). As said, it is a gypsum plaster that sets quickly. It comprises a fine white powder, which during its use is moistened and allowed to dry, so that it can become hard. The name of this building material was derived from the location, that is, Paris, from where gypsum in abundance amount was derived and this material was prepared. The best thing about this material is that it does not shrink or crack when dry. This makes it a perfect material for casting molds. Calcium sulfate dihydrate, or gypsum is heated to120Ã¢â‚¬â€œ180oC to prepare Plaster of Paris.