LOSS COMPENSATION METHODS FOR STONE
JOHN GRISWOLD, & SARI URICHECK
1. “Plastic” defines a physical property of the fill material and not the class of materials. Plastic repairs can be made from a completely inorganic, nonpolymer material. By definition (in engineering terms) if a substance retains deformation caused by an applied pressure, it is a plastic material. The opposite of a plastic material is an elastic material, which resumes its shape after the applied pressure is removed.
2. “Dutchmen” is a slang term first used by English stonemasons. It was originally a derogatory way of describing the replacement of a damaged part of a stone with a small insert for the damaged area, considered the lazy alternative to replacing the entire element. It is now a commonly recognized term.
3. The term “putty” is formally defined as a lime putty (a fine mortar of slaked lime and water) but has been adapted to describe any finely divided mixture.
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SOURCES OF MATERIALSAkemi Marmorkit 1000
Wood and Stone, Inc., 10115 Residency Rd., Manassas, Va. 22110Araldite AY Epoxies
Ciba-Geigy Corporation, Seven Skyline Dr., Hawthorne, N.Y. 10532-2188Carbone #AB-123 Putty
Martin R. Carbone, Inc., 2519 Bath St., Santa Barbara, Calif. 93105Edison Coatings
Edison Coatings, Inc., Waterbury, Conn.Epotek epoxies
Epoxy Technology, Inc., 14 Fortune Dr., Billerica, Mass. 01821Ethylene acrylic acid copolymers A-C 540 and 580
Allied Signal Corp., A-C Performance Additives, P.O. Box 2332, Morristown, N.J. 07962-2332Glass microspheres from 3M Corporation
Conservation Support Systems, 924 W. Pedregosa St., Santa Barbara, Calif. 93101HXTAL NYL-1
Conservation Materials, Ltd., P.O. Box 2884, Sparks, Nev. 89431Irganox, antioxidan T and thermal stabilizer
Ciba-Geigy Corp., Seven Skyline Dr., Hawthorne, N.Y. 10532-2188Jahn Mortars
Cathedral Stoneworks, 8332 Bristol Ct. #107, Jessup, Md. 20794Liquitex modeling pastes
Binney & Smith, Inc., Easton, Pa. 18044-0431Milliput
Milliput Corp., Unit 5, The Marion, Dolgellau, Mid Wales LL40 1UU, U.K.Permafill
Bondfast Co., Bridgewater, N.J. 08807Pliacre
Philadelphia Resins Corp., 20 Commerce Dr., Montgomeryville, Pa. 18936Polyfilla
Conservation Materials, Ltd., P.O. Box 2884, Sparks, Nev. 89431Polyvinyl acetate resins PVAC AYAA and AYAC
Union Carbide Corp., Specialty Chemicals and Plastics, Old Ridgebury Rd., Danbury, Conn. 06817Polyfix
Lepage's Ltd., Bramalea, Ontario L6T 2J4, Canada
Thompson's #5 White Hard Fusing Glass Enamel Powder
Thompson Enamel, a division of Ceramic Coating Co., 650 Colfax Ave., Bellevue, Ky. 41073
JOHN GRISWOLD received his B.A. in art history from the University of California at Irvine and a master's of art conservation (research) from Queen's University, Ontario, Canada. He is a partner in Wharton & Griswold Associates, a private conservation firm based in Los Angeles and Santa Barbara, California, specializing in the conservation of objects and architectural elements. He is a Professional Associate of AIC, and a past chair of the AIC Objects Specialty Group. He is currently president of the Western Association for Art Conservation (WAAC). Address: Wharton & Griswold Associates, 549 Hot Springs Rd., Santa Barbara, Calif. 93108.
SARI URICHECK received her bachelor's degree in chemistry from Johns Hopkins University and is currently studying conservation at the Conservation Center, Institute of Fine Arts, New York University. Address: New York University, Institute of Fine Arts, 14 E. 78th St., New York, N.Y. 10021.