A CASE STUDY IN THE USE OF CYCLODODECANE AND LATEX RUBBER IN THE MOLDING OF MARBLE
JEFFREY P. MAISH, & ERIK RISSER
The authors would like to acknowledge Jerry C. Podany, head of the Antiquities Conservation Department at the J. Paul Getty Museum, for presenting us with this molding project and its challenges.
1. Safety and ventilation precautions should be observed when handling these materials. Additional caution should always be exercised in heating any mixture containing a solvent. Cyclododecane melts at 61°C and has a flash point of 95°C. Naphtha has a flash point of 50°C. Cyclododecane is considered an irritant.
Baird, D.1965. Latex micro-molding and latex-plaster molding mixture. Science122:202
Brückle, I., J.Thornton, K.Nichols, and G.Strickler. 1999. Cyclododecane: Technical note on some uses in paper and objects conservation. Journal of the American Institute for Conservation38:162–75.
Buttle, J. W., D. J.Daniels, and P. J.Beckett. 1974. Chemistry: A unified approach,. London: Butterworths. 369.
Caspi, S., and E.Kaplan. 2001. Dilemmas in transporting unstable ceramics: A look at cyclododecane. Paper presented at Objects Group Session, AIC 29th Annual Meeting, Dallas, Tex.
Hangleiter, H.2000. Cyclododecane (CCD) eMaterialinformation. www.hangleiter.com (accessed May 2002).
Maish, J. P.1994. Silicone rubber staining of terracotta surfaces. Studies in Conservation39:250–56.
Mills, J., and R.White. 1987. The organic chemistry of museum objects. London: Butterworths. 99–101.
Pulga, S.1997. A note on the use of silicone rubber facings in the reassembly of archaeological painted plasters. Studies in Conservation42:38–42.
Stein, R., J.Kimmel, M.Marincola, and F.Klemm. 2000. Observations on cyclododecane as a temporary consolidant for stone. Journal of the American Institute for Conservation39:355–69.
KremerPigment. 2001. Material safety data sheet 87100, cyclododecane. New York, N. Y.
SOURCES OF MATERIALSCyclododecane
Kremer Pigment Inc. 228 Elizabeth St. New York, N.Y. 10012Digital Microscope Camera
Edmund Industrial Optics 101 East Gloucester Pike Barrington, N.J. 08007Latex 74
A-R Products, Inc. 11807 7/8 Slauson Ave. Santa Fe Springs, Calif. 90670Heraeus Kulzer 0–67 Snow White Plaster (.14% expansion)
Patterson Dental Supply 1031 Mendota Heights Rd. St. Paul, Minn. 55120Trowelable plastic material (mother mold), Evergreen 30A urethane
Smooth-on, Inc. 2000 St. John St. Easton, Pa. 18042
JEFFREY P. MAISH is an associate conservator of antiquities at the J. Paul Getty Museum and has an ongoing interest in issues concerning the replication of museum objects. He has also been actively involved in the radiography of objects, planning for radiography, and the implementation of different radiographic methods. He has participated in the technical investigation of many ancient bronzes as well as other material types in the museum's collection. Address: Antiquities Conservation Department, J. Paul Getty Museum, 1200 Getty Center Dr., Suite 1000, Los Angeles, Calif. 90049.
ERIK RISSER holds a B.A. in classical archaeology from the University of Evansville and an M.Sc. in conservation for archaeology and museums from the Institute of Archaeology, University College, London. He is currently an assistant conservator of antiquities on contract at the J. Paul Getty Museum. He has previously worked for the British Museum and Institute of Archaeology on the 'Ain Ghazal Statue Project and has undertaken and directed conservation activities on archaeological sites in Italy, France, and Turkey. In addition, he has worked on several mold-making projects, most recently on the large-scale molding and casting of a monumental figurative frieze in Turkey. Address as for Maish.