A polyester resin, dissolved in styrene, is hardened by mixing with a catalyst. The resin is often used with glass-fibre reinforcement to give glass-reinforced plastic (GRP). Small scale repair kits use similar materials but with the catalyst supplied as a paste.

This document describes some the hazards associated with plaster of Paris, and how to avoid the risks which these pose.

Focuses particularly on the heat generated, and the expansion of the plaster, as it sets.

Applying plaster board to a wooden frame. Finishing boarded surfaces using gypsum plaster.

Using Plaster of Paris to create 3D shapes.