Authors:
R. Rivenc The Getty Conservation Institute Analytical Technologies Section 1200 Getty Center Drive, Suite 700 Los Angeles CA 90049-1684 USA

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M. Schilling The Getty Conservation Institute Analytical Technologies Section 1200 Getty Center Drive, Suite 700 Los Angeles CA 90049-1684 USA

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Abstract  

Kinetic evaluation of thermogravimetry data was used to understand the ageing behavior of beeswax used as an artists’ paint medium on ancient mummy shrouds and Fayum portraits. Individual components of beeswax were subjected to dynamic thermogravimetry to assess their evaporation rates, and three methods of kinetic analysis were evaluated for accuracy. The results showed that although it is impossible to accurately predict the volatility at room temperature for individual components of beeswax due mostly to their high molecular mass, relative trends and ranking of the volatility of the compounds can be obtained which may explain compositional changes over time.

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Journal of Thermal Analysis and Calorimetry
Language English
Size A4
Year of
Foundation
1969
Volumes
per Year
1
Issues
per Year
24
Founder Akadémiai Kiadó
Founder's
Address
H-1117 Budapest, Hungary 1516 Budapest, PO Box 245.
Publisher Akadémiai Kiadó
Springer Nature Switzerland AG
Publisher's
Address
H-1117 Budapest, Hungary 1516 Budapest, PO Box 245.
CH-6330 Cham, Switzerland Gewerbestrasse 11.
Responsible
Publisher
Chief Executive Officer, Akadémiai Kiadó
ISSN 1388-6150 (Print)
ISSN 1588-2926 (Online)

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