Plaster of paris

Plaster of Paris consisting of a fine white powder which hardens when moistened and allowed to dry. Plaster of Paris is also known as Gypsum Plaster (CaSO4.1/2 H2O) OR (2CaSO4.H2O). Its chemical name is ‘Calcium sulphate hemihydrates’. It is a white powdery hydrated calcium sulphate.

1. Plaster of Paris

2. What is Plaster of Paris? Plaster of Paris consisting of a fine white powder which hardens when moistened and allowed to dry. Plaster of Paris is also known as Gypsum Plaster (CaSO 4 .1/2 H 2 O) OR (2CaSO 4 .H 2 O). Its chemical name is ‘Calcium sulphate hemihydrates’. It is a white powdery hydrated calcium sulphate.

3. What is the use of Plaster of Paris? The uses of plaster of Paris are as follows: It is used in medicine to make plaster casts to immobilize broken bones while they heal, though some orthopaedic casts are made of fibreglass or thermoplastics. It is commonly used to precast and hold parts of ornamental plaster work placed on ceilings and cornices. It is used for making toys, blackboard chalk, cheap ornaments, cosmetics, decorative materials and casts for statues. It is also used for beautification of ceilings of buildings and houses. It is also used for the setting of fractured bones in the right position. It is used by dentists for making casts of demure. It is used in chemistry laboratories for sealing air-gaps in apparatus where air tight arrangement is required. It is used for making walls of homes smooth before painting them and for making beautiful designs on the ceilings of houses and other buildings. It is also used as a fire proofing material.

4. How plaster of Paris is made? Plaster of Paris is made by heating the mineral gypsum. Large deposits were originally found outside of Paris in France, that why it is known as plaster of Paris. When gypsum is heated to about 150 degree Celsius, it loses water and produces the powder which is known as plaster of Paris. The chemical formula for plaster of Paris is CaSO 4 .1/2H 2 O. When water is added to the plaster of Paris powder it rehydrates (absorbs water) and quickly hardens. With an additive to retard the set, it is called wall, or hard wall, plaster, which can provide passive fire protection for interior surfaces.

5. Use of Plaster of Paris in history Plaster of Paris does not generally shrink or crack when dry, making it an excellent medium for casting moulds. It is commonly used to precast and hold parts of ornamental plasterwork placed on ceilings and cornices. It is also used in medicine to make plaster casts to immobilize broken bones while they heal, though many modern orthopaedic casts are made of fibreglass or thermoplastics. Some sculptors work directly in plaster of Paris, as the speed at which the plaster sets gives the work a sense of immediacy and enables the sculptor to achieve the original idea quickly. In medieval and Renaissance times , gesso (usually made of plaster of Paris mixed with glue) was applied to wood panels, plaster, stone, or canvas to provide the ground for tempera and oil painting.

6. Plaster of Paris manufacturers in Rajasthan There are many Plaster of Paris manufacturers in Rajasthan . You can contact them and enquire them about what you need.