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12. Thermal stability of colour and magnetic properties of iron-based pigments

Author

Ostorero, Elisa, Coïsson, Marco, Iacomussi, Paola, Olivetti, Elena Sonia, Giustetto, Roberto, Cavaleri, Tiziana, Piccirillo, Anna, and Ferrara, Enzo

Subjects
colour, pigments, magnetic properties, cultural heritage
Abstract

Poster presented at Geosciences for a sustainable future, joint congress of the Italian Geological Society (SGI) and the Italian Society of Mineralogy and Petrology (SIMP), held in Torino (Italy) from 19th to 21th September 2022.

Published
2022
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24. Below the surface of the coffin lid of Neskhonsuennekhy in the Museo Egizio collection.

Author

Cavaleri, Tiziana, Buscaglia, Paola, Caliri, Claudia, Ferraris, Enrico, Nervo, Marco, and Romano, Francesco Paolo

Subjects
*COFFINS, *MULTISPECTRAL imaging, *RADIOGRAPHY
Abstract

The multidisciplinary and multi‐technical study of the coffin lid of Neskhonsuennekhy (Turin, Museo Egizio, inventory number S.05245) datable to the 26th dynasty (664–525 BC) was launched in 2015 at the Centro Conservazione e Restauro La Venaria Reale during the conservation activities required by the Museo Egizio, as part of wider research on the so‐called red coffins. Widespread abrasions and gaps in the pictorial stratigraphy strongly impeded the reading of the decoration, and a reddish and locally blackened material was covering many areas. Integrating multispectral imaging (UV fluorescence, VIL, IR reflectography), MA‐XRF, radiography, and analyses on micro‐samplings (OM, SEM‐EDX, FT‐IR) allowed deepening the state of preservation, detecting previous intervention, and characterizing the blackened surface, necessary to define the cleaning intervention objectives. In particular, the IR reflectography allowed recovering the readability of the beautiful drawings and the ancient hieroglyphs hidden beneath the reddish blackened surface. Based on the analytical data and compatibility with the pigments known in ancient Egypt, it was possible to return to the public the original lost decoration with a descriptive and virtual reconstruction. The new LANDIS‐X scanning station equipped with a real‐time macro XRF was fundamental for studying pigments, glazes, and mixtures besides the presence of lead impurities in the copper source used to make the Egyptian blue pigment, encouraging the research on the sources of mineral supply. Finally, this study allowed understanding the technique of execution of the find, from the assembly of the wooden elements to the reddish finish, noticing analogies with the other red coffins. [ABSTRACT FROM AUTHOR]

Published
2021
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