Microanalysis of clay-based pigments in painted artworks by the means of Raman spectroscopy

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60461446%3A52810%2F13%3A%230000134" target="_blank" >RIV/60461446:52810/13:#0000134 - isvavai.cz</a>
Result on the web
<a href="http://onlinelibrary.wiley.com/doi/10.1002/jrs.4381/abstract" target="_blank" >http://onlinelibrary.wiley.com/doi/10.1002/jrs.4381/abstract</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1002/jrs.4381" target="_blank" >10.1002/jrs.4381</a>

Result language
angličtina
Original language name
Microanalysis of clay-based pigments in painted artworks by the means of Raman spectroscopy
Original language description
FT Raman spectroscopy and micro-Raman spectroscopy with lasers of three different wavelengths (1064 nm, 785nm and 532 nm) were used for analysis of reference samples of natural clay pigments including white clay minerals (kaolinite, illite, montmorillonite), green earths (glauconite and celadonite) and red earths (natural mixtures of white clay minerals with hematite). In addition, eight micro-samples obtained from historical paintings containing clay pigments in ground and colour layers have been examined. Powder X-ray diffraction and micro-diffraction were used as supplementary methods. It was found that laser operating at 1064nm provided the best quality Raman spectra for distinguishing different white clay minerals, but the spectra of green and redearths were affected by strong fluorescence caused by the presence of iron. Green earth minerals could be easily distinguished by 532 or 785nm excitation lasers, even in small concentrations in the paint layers. On the other hand, when a
Czech name
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Czech description
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Type
J<sub>x</sub> - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)
CEP classification
CA - Inorganic chemistry
OECD FORD branch
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Project
<a href="/en/project/DF12P01OVV048" target="_blank" >DF12P01OVV048: New portable instruments, laboratory and methodology for the non-destructive materials analysis of the fine art in the frame of cultural heritage protection</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year
2013
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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