NOTES

1. THE PVACs were obtained from Conservation Materials in Sparks, Nevada. The designations AYAC, AYAA, AYAF, and AYAT are copyrighted trade designations of Union Carbide.

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AUTHOR INFORMATION

ERIC F. HANSEN graduated from the University of California at Irvine in 1980 with an M.S. in organic chemistry and joined the Getty Conservation Institute in 1985. In his current position as an associate scientist he is pursuing his interests in the environmentally induced deterioration of synthetic and natural organic materials (including collagen, fibroin, and keratin), the conservation of ethnographic and archaeological objects, and the analysis of the effects of treatment parameters on the final physical and optical properties of treated objects. Address: Getty Conservation Institute, 4503 Glencoe Ave., Marina del Rey, Calif. 90292.

MICHELE R. DERRICK graduated from Oklahoma State University in 1979 with an M.S. in analytical chemistry. She joined the Getty Conservation Institute in 1983 and is currently an associate scientist. Her research involves the development of new methods for the characterization and identification of organic materials in cultural objects primarily using infrared spectroscopy and pyrolysis gas chromatography. Address: Getty Conservation Institute, 4503 Glencoe Ave., Marina del Rey, Calif. 90292.

MICHAEL R. SCHILLING graduated from California State Polytechnic University at Pomona in 1990 with an M.S. in chemistry. He joined the Getty Conservation Institute in 1983 and is currently an associate scientist. He specializes in thermal analysis research, the examination of painted surfaces, and instrumental analysis (gas chromatography-mass spectroscopy). Address: Getty Conservation Institute, 4503 Glencoe Ave., Marina del Rey, Caif. 90292.

RAFAEL GARCIA worked at the Getty Conservation Institute as a student assistant from 1987 to 1989 while pursuing undergraduate studies in chemistry at Loyola Marymount University. He received his B.S. in 1989 and is currently a graduate student in chemistry at California State University at Long Beach. Address: Getty Conservation Institute, 4503 Glencoe Ave., Marina del Rey, Calif. 90202.