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http://hdl.handle.net/10174/17017
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Title: | Are they fresco paintings? Technical and material study of Casas Pintadas of Vasco da Gama house in Évora (Southern Portugal). |
Authors: | Gil, M Rosado, R Ribeiro Pestana Caldeira, A T Carvalho, L Dias, L Mirão, J Candeias, AJ |
Keywords: | fresco paintings pigments |
Issue Date: | 2015 |
Citation: | Milene Gil, T. Rosado, AT Caldeira, L Carvalho, J Mirão, A Candeias (2015). Are they fresco paintings? Technical and material study of Casas Pintadas of Vasco da Gama house in Évora (Southern Portugal). X-Ray Spectrometry 44(3). DOI:10.1002/xrs.2593 |
Abstract: | The present paper describes the characterization and comparative study carried out on the 16th centurymurals of Casas Pintadas of
the so-called Vasco da Gama House in the town of Évora, Southern Portugal. Even today, the two existing paintings in the porch
vaulted cloister raise many questions about the pictorial techniques and materials that were used. The most adopted theory is that
the upper register inspired in medieval bestiarywas made with a secco technique, while the lower grotteschi friezewas achieved with
a fresco technique. A multianalytical research was carried out in situ and in laboratory in order to attest this hypothesis and to characterize
the paintings materials. Surface examination was made with normal and racking light complemented with in situ spectrophotometry
in the visible, with stratigraphic and analytical study of microsamples by optical microscopy (OM) and scanning
electron microscopy coupled with energy dispersive X-ray spectrometry (SEM-EDS). The results show similarities in the structure
and elemental composition of both paintings mortars and pigments. The mortars’ inner layers (the intonaci) were made with siliceous
sandsmixedwitha dolomitic lime-based plaster (CaMg(CO3)2). On top of it, one to three thin layers of lime wash were applied.
In SEM-EDS elemental maps, all the pigments at the cross-sections are embedded in a calcium carbonate matrice, and several nails
marks are visible in situ with racking light in both paintings indicating a fresco technique. |
URI: | http://hdl.handle.net/10174/17017 |
Type: | article |
Appears in Collections: | QUI - Publicações - Artigos em Revistas Internacionais Com Arbitragem Científica HERCULES - Publicações - Artigos em Revistas Internacionais Com Arbitragem Científica
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