This is a formulated hemihydrates plaster(CaSO4.1/2H2o) produced from naturally occurring gypsum mineral. It exists in Pink or White colour. Used in the dental industry this high strength plaster is used for orthodontic work. Typical Data Recommended mixing ratio100g/21 mlSetting time(Vicat)10 minCompressive strength@1h :59MPaLinear expansion@1h:0.08%