A plaster mixture for forming a machinable composition, includes calcium sulfate hemihydrate; an internal lubricating dispersable binder, and an adhesive binder for adhering the plaster mixture to a substrate. In the preferred embodiment, the composition includes calcium sulfate hemihydrate, a poly(ethylene...http://www.google.es/patents/US6355099?utm_source=gb-gplus-sharePatente US6355099 - Plaster mixture for forming a machinable composition
Plaster mixture for forming a machinable composition
