Book excerpt: Proceedings of a May 1994 symposium held to present cutting edge multidisciplinary work on the characterization of ancient materials; the technologies of selection, production, and usage by which materials are transformed into the objects and artifacts we find today; the science underlying their deterioration, preservation, and conservation; and sociocultural interpretation derived from an empirical methodology of observation, measurement, and experimentation. Over 70 contributions discuss topics that include the visual appearance and the imitation of one material by another; stable protective coatings and materials stability; resource surveying, source characterization, and cultural implications; and process reconstruction as essential to understanding of condition and conservation. Annotation copyright by Book News, Inc., Portland, OR