We are a major supplier of fine grade Plaster of Paris to the ceramic industry and able to offer grades to suit most manufacturing processes.
Our range of plaster for modelling and case-mould production is based upon Alpha hemi-hydrate giving a combination of correct expansion and hardness, which is ideally suited for this purpose.
The careful blending of alpha and beta plasters enable us to offer a wide range combining good absorption and permeability together with high strength and a superior mould life, suitable for jollying, jiggering and casting. We also supply special grades for use in self-levelling floors, for roofing, and acoustic tiles. Mould release agents are also available.
We can offer Beta plasters with a very high purity which have been produced especially for moulds used for casting. These are widely used in the sanitary ware and bone china industries.
Typical setting times for standard grade plaster are:
Initial set: 6-10 min
Final set: 18-30 min
The plaster/water ratios given are indicated levels for typical use. Higher or lower levels can be used depending upon your needs and application.
The use of a vicat ring is recommended to help determine the correct time to pour the plaster e.g. 21-22cms for typical plasters.