(Formerly numbered Conservation of Archaeological and Ethnographic Materials M250.) (Same as Materials Science M215.) Laboratory, four hours. Requisites: courses 210 (or 216 or Materials Science C112), 210L, 264. Recommended: course M215. Research-based laboratory on conservation of rock art, wall paintings (archaeological and modern composites on cements), mosaics, and decorated architectural surfaces. Experimental techniques and analysis of materials (using materials science and reverse engineering processes) for characterization of technology, constituent materials, and alteration products; development of conservation treatment proposals, testing of conservation products, and methods and conservation treatment. Letter grading.