Published online by Cambridge University Press: 26 July 2017
AIR-ABRASIVE, also called Airbrasive (a trademark of the Pennwalt S.S. White Co.), units are in effect miniature sandblasting machines. The units propel an abrasive, by means of a gas, through a flexible hose attached to a handpiece. Originally designed for dental and industrial uses, these units are now widely used for preparing fossils. The air abrasive can be used by itself or in combination with other techniques to excavate fossils from matrix, to remove matrix from areas of specimens for detailed study, and to elevate specimens above the surface of the matrix for display and photography. The technique of preparing fossils using the air abrasive has been previously described and discussed by a number of authors, notably by Stucker (1961), Stucker et al. (1965), Rixon (1976, p. 75–77), and Converse (1984, p. 42–49).