This white plaster has a very low expansion and a very low heat generation during setting. Articulation plaster is a natural gypsum dental plaster with dependable strength and minimal setting expansion. Articulation plaster is a tough plaster with a fast final set to ensure articulated models remain in position, allowing the technician to duplicate jaw movements without the risk of the models shifting. Articulation Plaster is recommended for use during any type of articulating process. Articulating procedures vary greatly depending on the type of articulator used. Very fast initial set of just 2-3 minutes and 0.13% expansion @ 2 hours.