Discrimination of painting binders subjected to photo-ageing by using microspectrofluorometry coupled with deconvolution analysis |
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| Institution: | 1. Institute of Science and Technology in Art, Academy of Fine Arts Vienna, Vienna, Austria;2. Laboratory for Ion Beam Interactions, Ruđer Bošković Institute, Zagreb, Croatia;3. Institute of Chemical Technologies and Analytics, Vienna University of Technology, Vienna, Austria;4. Institute of Conservation and Restoration, University of Applied Arts Vienna, Vienna, Austria;1. Univ. Bretagne Sud, UMR CNRS 6027, IRDL, F-56100 Lorient, France;2. School of Sciences and Technologies (SST), Università di Camerino, Chemistry Division, via S.Agostino n.1, 62032 Camerino, Italy;3. Laboratorio di Risonanza Magnetica “Capitani-Segre”, Istituto per i Sistemi Biologici, Area della ricerca di Roma 1, CNR, 00015 Monterotondo, Roma, Italy;4. LMGC, Université de Montpellier, CNRS, Montpellier, France;5. Synchrotron SOLEIL, DISCO beamline, Gif-sur-Yvette, France;6. UR1268 Biopolymères Interactions Assemblages, INRAE, Nantes, France;7. Università di Camerino, Innovative Techniques for Cultural Heritage, via Pacifici n.2, Ascoli Piceno, 63100 Italy;8. School of Sciences and Technologies (SST), Università di Camerino, Geology Division, via Gentile III da Varano, 62032 Camerino, Italy;1. Institute for the Study, Conservation and Restoration of Cultural Heritage, Faculty of Fine Arts, Nicolaus Copernicus University, ul. Sienkiewicza 30/32, 87-100 Torun, Poland;2. Istituto di Scienze e Tecnologie Molecolari (CNR-ISTM), Via Elce di Sotto, 8, 06123 Perugia, Italy;3. Dipartimento di Chimica, Biologia, e Biotecnologie, Università di Perugia, Via Elce di Sotto, 8, 06123 Perugia, Italy;4. Cultural Heritage Agency of the Netherlands (RCE), Hobbemastraat 22, 1071 ZC, Amsterdam, The Netherlands;5. Institute of Physics, Faculty of Physics, Astronomy and Informatics, Nicolaus Copernicus University, ul. Grudziądzka 5, 87-100 Torun, Poland |
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| Abstract: | Organic binding media found in paintings exhibit characteristic fluorescence properties that strictly correlate with their chemical composition and may vary as a function of the ageing time. The aim of this work was to investigate the capability of microspectrofluorometry to distinguish between different binders. Linseed oil and protein-based media, deposited as thin films on microscope glass slides both in the presence and in the absence of inorganic pigments, were examined before and after artificial photo-ageing. Cross-sections of some paint layers were also examined. The article points out that microspectrofluorometry coupled with deconvolution analysis can be a useful tool for distinguishing between oil- and protein-based media. The curve-fitting analysis furnished a fine characterization of each binder/pigment combination, and highlighted the small spectral differences between their fluorescence signals. |
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