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Tuesday, May 17 • 3:00pm - 3:30pm
(Objects) Using Heat and Cold in the Treatment of a Lakota Winter Count

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This paper explores the application of a temperature-based treatment methodology. Specifically, it examines how heat and cold were successfully utilized in the conservation of a Lakota winter count. While conservators have employed elevated temperatures in the active treatment of objects, the use of low temperatures has been largely unexplored. Work carried out by Arizona State Museum (ASM) conservators indicates that both temperature extremes can be used to manipulate material properties in advantageous ways. The use of cold should not be overlooked when considering treatment options. Winter counts, pictorial calendars/histories, were traditionally fabricated using mineral pigment on a hide support. During the late nineteenth-century, commercially available media as well as paper and cloth substrates increasingly replaced traditional materials. The nineteenth-century winter count at the center of this study was drawn on the reverse (textile) side of a commercially manufactured oilcloth tablecloth. At some time after the application of the pictographs, the object was folded in half with the applied oil surfaces facing each other. While in this configuration, the count was subjected to disastrously high storage temperatures causing the oil-coated surface to soften and adhere to itself. Subsequent attempts by non-museum personnel to un-fold the object resulted in tearing of the coated textile. Testing carried out at the ASM conservation lab found the use of lowered and elevated temperatures allowed for the effective and efficient treatment of the object. The aged, the cross-linked oil coating was largely unaffected by solvent. However, when the temperature of the surface coating was lowered using a Peltier cooler, the applied coating became increasingly embrittled allowing the fused surfaces to be cleaved along the plain of contact through mechanical action. Conversely, experimentation found that tears in the fabric were best stabilized using a heat-seat adhesive. Lascaux Textile Welding Powder was employed to tack together fibers along tears holding together where traditional stich repairs or bulky patches could not be applied.

Speakers
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Madeleine Neiman

Project Conservator, Penn Museum
Madeleine Neiman is a graduate of the UCLA/Getty Program on the Conservation of Archaeological and Ethnographic Materials and is currently a project conservator at the Penn Museum. Her previous conservation work includes a fellowship Kelsey Museum of Archaeology as well as internships at the Arizona State Museum, Colonial Williamsburg Foundation, the Alaska State Museum, and the Anchorage Museum.
avatar for Nancy Odegaard

Nancy Odegaard

Conservator - Professor, Arizona State Museum - University of Arizona
Nancy Odegaard is the Head of the Preservation Division at the Arizona State Museum on the campus of the University of Arizona in Tucson where she is also a professor with the Department of Material Science & Engineering, the School of Anthropology, and the Drachman Institute (historic preservation). She completed conservation graduate studies at George Washington University and the Smithsonian Institution in Washington DC, and a doctoral... Read More →

Co-Author(s)
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Dave Smith

Adjunct Conservation Scientist, Arizona State Museum
David Smith is an adjunct conservation scientist in the Preservation Division at the Arizona State Museum at the University of Arizona. He also serves as adjunct faculty in the University of Arizona's chemistry department and is a Senior Engineering Fellow at Raytheon Corporation. He is an analytical chemist with over 40 years of experience who has developed an interest in applying analytical chemistry to the conservation of cultural objects... Read More →


Tuesday May 17, 2016 3:00pm - 3:30pm
Room 516 AB


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