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Archaeological and Anthropological Sciences

, Volume 11, Issue 9, pp 5001–5008 | Cite as

Practical application of visible-induced luminescence and use of parasitic IR reflectance as relative spatial reference in Egyptian artifacts

  • Paolo A. M. Triolo
  • Martina Spingardi
  • Giorgio A. Costa
  • Federico LocardiEmail author
Original Paper

Abstract

Egyptian blue (CaCuSi4O10) is one of the most ancient artificial pigments, widely used in ancient times. Its peculiarity is an exceptional infrared emission upon visible excitation, allowing an easy and non-invasive diagnostic through the so-called visible-induced luminescence (VIL) technique. Usually, it requires total absence of infrared parasitic light, highlighting areas in which the pigment is present even in traces. In this report, we propose the introduction of a small portion of IR parasitic light as spatial reference for locating Egyptian blue on analyzed object. In VIL modality, the contemporary reflectance transformation imaging (RTI) and 3D photogrammetric model reconstruction were performed with the final 3D rebuilding of surface, morphology, and pigment distribution. We demonstrated the possibility to perform VIL and 3D photogrammetry without opening the conservation case that is extremely important by a conservation point of view, avoiding any microclimatic alteration, compatibly with the minimum invasiveness (absence of contact and displacement of the object).

Keywords

Egyptian blue Visible-induced luminescence Infrared emission Reflectance transformation imaging Photogrammetry Egyptian artifacts 

Notes

Acknowledgements

The authors kindly acknowledge Dr.ssa Valentina Turina of the Museo Egizio di Torino (Fondazione Museo delle Antichità Egizie di Torino, Turin, Italy) and Dr. Guido Rossi of the Museo di Archeologia Ligure (Genoa, Italy) for having granted analyses on the artifacts.

Compliance with ethical standards

Conflict of interest

The authors declare that they have no conflict of interest.

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Copyright information

© Springer-Verlag GmbH Germany, part of Springer Nature 2019

Authors and Affiliations

  1. 1.Dipartimento di Scienze della Terra dell’Ambiente e della VitaUniversità degli Studi di GenovaGenoaItaly
  2. 2.Dipartimento di Chimica e Chimica IndustrialeUniversità degli Studi di GenovaGenoaItaly
  3. 3.CNR – SPINGenoaItaly

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