ANYL Susan Lunte  Tuesday, August 24, 2010 

214 - Non-invasive NMR characterization and evaluation of conservation
treatments of oil stains in works of art on paper


Dr. Silvia Centeno, Prof. Cindie Kehlet, Penelope Currier, Denise Stockman, Prof. Eleonora Del Federico Department of Mathematics and Science, Pratt Institute, Brooklyn, NY, United States; Scientific Research, The Metropolitan Museum of Art, New York, New York, United States; Conservation Department, New York Public Library, New York, New York, United States

Non-invasive unilateral NMR combined
with multivariate data analysis is used to discriminate stains of oils with
different iodine numbers, applied on different paper substrates, and subject to
various accelerated aging methods to mimic stains on real works of art. A
correlation between the transverse relaxation decay and the average iodine
number of the oil allows to estimate whether the stains contain a drying, semi-
or non-drying oil. This information is crucial when choosing appropriate
conservation treatments for the works of art.
It is demonstrated that it is possible to discriminate the oil groups
independently of the paper substrates and of the accelerated aging methods
used. The technique is also demonstrated to be useful to non-invasively follow
up the progress of conservation/ restoration treatments selected from three
general groups frequently used in paper conservation, namely enzymatic,
solvent, and bleaching. The efficiency
of each treatment for removing drying and non-drying oil stains is discussed,
and the influence of the type of paper support and aging method used for the
different stains are assessed based on the NMR relaxation behavior.


Tuesday, August 24, 2010 07:00 PM
General Posters (07:00 PM - 09:00 PM)
Location: Boston Convention & Exhibition Center
Room: Hall C

 

*ACS does not own copyrights to the individual abstracts. For permission, please contact the author(s) of the abstract.

 

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