Effects of gamma rays on a restored painting from the XVIIth century |
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| Authors: | M. M. Rizzo L. D. B. Machado S. I. Borrely M. H. O. Sampa P. R. Rela J. P. S. Farah R. I. Schumacher |
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| Affiliation: | 1. Department of Analytical Chemistry, University of the Basque Country (UPV/EHU), PO Box 644, E-48080 Bilbao, Spain;2. School of Science and Technology, Department of Chemistry, University of Camerino (UNICAM), 62032, Camerino, Italy;3. Technologies and Diagnostic for Conservation and Restoration Laboratory, University of Camerino (UNICAM), 63100, Ascoli Piceno, Italy;4. Unesco Chair on Cultural Landscape and Heritage, University of the Basque Country (UPV/EHU), P.O. Box 450, 01006 Vitoria-Gasteiz, Spain |
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| Abstract: | The subject of this study is a Peruvian painting from the 17th century, which has been recently restored and then contaminated by mould. It received different unsuccessful treatments. Therefore, radiation process was suggested as an alternative once it is an effective technology for decontamination and conservation purposes. The aim of this study is to investigate the influence of irradiation process on the original painting and on the products used in the restoration process. These products were irradiated with 60Co gamma rays applying doses in the range of 6–25 kGy. The polymeric materials were characterized by thermal analysis techniques before and after irradiation. The colour of the pigments irradiated and non-irradiated were compared by spectrophotometric analysis. Small samples removed of the original painting were also irradiated and investigated. The results obtained until now allowed concluding that the irradiation with the appropriated dose of 6.0 kGy, according to the literature, will not damage the restored painting. |
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| Keywords: | Gamma radiation Decontamination Artwork conservation |
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