Non-invasive and micro-destructive investigation of the <Emphasis Type="Italic">Domus Aurea</Emphasis> wall painting decorations |
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Authors: | Catia?Clementi Valeria?Ciocan Manuela?Vagnini Brenda?Doherty Marisa?Laurenzi?Tabasso Cinzia?Conti Brunetto?Giovanni?Brunetti Email author" target="_blank">Costanza?MilianiEmail author |
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Institution: | 1.SMAArt, c/o Dipartimento di Chimica,Università degli Studi di Perugia,Perugia,Italy;2.SMAART,Università degli Studi di Perugia e INSTM,Perugia,Italy;3.SMAART e il Restauro dei Beni Culturali,Università degli Studi di Roma,Roma,Italy;4.Archeologica di Roma,Roma,Italy;5.Istituto CNR di Scienze e Tecnologie Molecolari (CNR-ISTM), c/o Dipartimento di Chimica,Università degli Studi di Perugia,Perugia,Italy |
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Abstract: | The paper reports on the exploitation of an educated multi-technique analytical approach based on a wide non invasive step
followed by a focused micro-destructive step, aimed at the minimally invasive identification of the pigments decorating the
ceiling of the Gilded Vault of the Domus Aurea in Rome. The combination of elemental analysis with molecular characterization provided by X-ray fluorescence and UV–vis
spectroscopies, respectively, allowed for the in situ non-invasive identification of a remarkable number of pigments, namely
Egyptian blue, green earth, cinnabar, red ochre and an anthraquinonic lake. The study was completed with the Raman analysis
of two bulk samples, in particular, SERS measurements allowed for the speciation of the anthraquinonic pigment. Elemental
mapping by scanning electron microscopy-energy dispersive spectrometer combined with micro-fluorimetry on cross-section gave
an insight into both the distribution of different blend of pigments and on the nature of the inorganic support of the red
dye. |
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