The Lime Plaster is made by mixing Calcium Hydroxide and Sand. The use of Clay Plaster is not as much as it was in the early Nineteenth century in Utopian villages. Clay Plaster is also used in making the interiors of a house. The Clay Plaster is made by mixing clay, sand and water along with plant fibers. It can be used as a fire-proof material as well due to its fire-resistant quality. There is a variety of toys and decorative items available made out of Gypsum Plaster. It is also used by dentists for preparing casts. Gypsum Plaster is used for setting fractured bones by doctors in hospitals. This plaster is made by heating Gypsum at 120 to 180℃. Water when added, Gypsum crystals are formed in order to achieve the solid-state. It is applied in the form to enable quick setting using water. Plaster of Paris is a dry white powder and can be effectively worked with metal or even sheets and it can be molded as desired. It forms a very thick surface and can resist normal knocks after drying. At high temperatures, the plaster of Paris also decomposes and becomes toxic oxides. Hence, there are no cracks on the surface of the dry Plaster of Paris. The material does not shrink when it sets. Plaster of Paris has fire resistance quality and its material is ideal for heat insulation. In extreme conditions, it also acts as an oxidizing agent. Plaster of Paris is non-flammable as well as non-combustible as it has a low chemical reactivity. There are two main properties of Plaster of Paris: The Plaster of Paris name has been used since ancient times because of the abundant preparation of Gypsum found near Paris.

On mixing it with an adequate amount of water, it forms a plastic mass that gets into a hard solid in 5 to 15 minutes. The plaster of Paris has a remarkable property of setting with water.

When heated above 393 K, no water of crystallization is left, and we get an anhydrous calcium sulfate, C a S O 4. 2 H 2 O → ( heated at 393 K ) → 2 ( C a S O 4 ). 2 H 2 O ) is heated to 393 K.Ģ C a S O 4. Plaster of Paris is a hemihydrate of Calcium Sulfate. In order to obtain Plaster of Paris, Calcining Gypsum is heated at a very high temperature. Plaster of Paris is a white color powder that is nothing but hydrated Calcium Sulfate and it is obtained from Calcining Gypsum. There are many uses of Plaster of Paris in our day to day life. We all know that the plaster of Paris is used by doctors to support fractured bones, it is also used in the construction industry, in making casts for statues and making designs for ceilings. Plaster of Paris is a very popular chemical substance that is mostly used for sculpting and also in gauze bandages.

Plastic molds for plaster of paris