Plaster

Plaster, specifically Plaster of Paris, is a quick-setting gypsum plaster made of fine white powder (calcium sulphate hemihydrate) that hardens when wet and left to dry. Its chemical formula is CaSO4.1/2H2O indicating that it is a dihydrate compound. When heated it forms an anhydrous calcium sulphate.

Plaster and Plaster of Paris exhibits several properties, including being fire-resistant, with low expansion (expanding slowly and slightly upon setting), and forming a robust surface to resist regular knocks after drying. Plaster of Paris is  non-flammable, and non-combustible, and has low chemical reactivity.

Plaster is most commonly valued for being easily and rapidly mixed in with very good uniform dispersion and stable rheology properties, although other performance benefits include:

- Easily dispersed with stable rheological properties
- Good cure rates and thermal conductivity
- High chemical resistance
- High purity grades can be used in specialist pharmaceutical and food manufacturing

Grades Available

AgM:P10 Alpha Plaster
AgM:P20 Beta Plaster/Casting Plaster
AgM:P30 Jiggering Plaster
AgM:P40 Ram Press Plaster
AgM:P50 Ceramic Moulding Plaster
AgM:P60 Case Plaster