Terracotta polychrome sculptures examined before and after their conservation work: contributions from non-invasive in situ analytical techniques

Year: 2011

Authors: Colombo C., Bevilacqua F., Brambilla L., Conti C., Realini M., Striova J., Zerbi G.

Autors Affiliation: ICVBC CNR, Via Cozzi 53, 20125 Milan, Italy; C.R.C. Restauri, 40139 Bologna, Italy; Dipartimento Chimica, Materiali e Ingegneria Chimica “Giulio Natta”, Politecnico di Milano, Piazza Leonardo da Vinci 32, 20133 Milan, Italy; ICVBC-CNR,
Via Madonna del Piano 10,50019 Sesto Fiorentino, Italy

Abstract: The potential of non-invasive in situ analytical techniques such as portable Raman, portable X-ray fluorescence, portable optical microscope and fibre optics reflectance spectroscopy has been shown studying painted layers of Renaissance terracotta polychrome sculptures belonging to the statuary of Santo Sepolcro Church in Milan. The results obtained allowed pointing out the contribution of these techniques to the compositional diagnostic, providing complete information, in some cases, better than micro-destructive techniques, on the kind of pigments used on the external painted layers. Moreover, a comparison with the results obtained before the last conservation work (2009) with micro-destructive techniques allowed ascertaining the removal of the external painted layers during the conservation operations.


Volume: 401 (2)      Pages from: 757  to: 765

KeyWords: portable Raman; portable XRF; monitoring; polychrome; terracotta
DOI: 10.1007/s00216-011-5085-1

Citations: 15
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