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Title
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Neutron radiography for the study of water uptake in painting canvases and preparation layers
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Author
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Abstract
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| Easel paintings on canvas are subjected to alteration mechanisms triggered or accelerated by moisture. For the study of the spatial distribution and kinetics of such interactions, a moisture exposure chamber was designed and built to perform neutron radiography experiments. Multilayered sized and primed canvas samples were prepared for time-resolved experiments in the ICON cold neutron beamline. The first results show that the set-up gives a good contrast and sufficient resolution to visualise the water uptake in the layers of canvas, size and priming. The results allow, for the first time, real-time visualisation of the interaction of water vapour with such layered systems. This offers important new opportunities for relevant, spatially and time-resolved material behaviour studies and opens the way towards numerical modelling of the process. These first results show that cellulose fibres and glue sizing have a much stronger water uptake than the chalkglue ground. Additionally, it shows that the uptake rate is not uniform throughout the thickness of the sized canvas. With prolonged moisture exposure, a higher amount of water is accumulating at the lower edge of the canvas weave suggesting a decrease in permeability in the sized canvas with increased water content. |
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Language
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English
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Source (journal)
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Applied physics A : materials science & processing. - Heidelberg, 1995, currens
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Publication
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Heidelberg
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Springer
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2015
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ISSN
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0947-8396
[print]
1432-0630
[online]
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DOI
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10.1007/S00339-015-9381-Z
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Volume/pages
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121
:3
(2015)
, p. 837-847
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ISI
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000364914100006
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Full text (Publisher's DOI)
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