Feasibility study of using gamma ray for fungal decontamination of historical oil painting

Sheikh, Nasrin; Beteshobabrud, Ramsina; Khatamifar, Fatemeh

Feasibility study of using gamma ray for fungal decontamination of historical oil painting

Document Type : Research Paper

Authors

Nasrin Sheikh

Ramsina Beteshobabrud

Fatemeh Khatamifar

Abstract

In this study, gamma irradiation as a method for fungal decontamination of a historical oil painting was evaluated. For this purpose, an oil painting belonging to the Ghajar period with Ghahvekhanei style was selected. Sampling of suspected and discolored points on the surface and backside of the artwork was done and the total counts of fungi were detected. The dose of gamma ray for decontamination of painting was calculated. To study the radiation effects on the color materials used in the painting, small samples were taken from its two main colors. The chemical structure and color measurement of the samples were monitored by FTIR and colorimeter before and after the irradiation. No infrared spectral changes were observed after the irradiation. Furthermore, it was found that gamma irradiation did not induce any significant color alterations. These results showed that irradiation with tested dose (5 kGy) did not damage the oil painting and therefore the radiation method could be recommended for disinfection of this kind of artwork.

Keywords

Gamma Ray

Oil painting

Fungal contamination

Calorimetric test

[1] M. Manea, L.V. Moise, M. Virgolici, C.D. Negut, Spectroscopic evaluation of painted layer structural changes induced by gamma radiation in experimental models, Radiation Physics and Chemistry, 81 (2012) 160-167.

[2] L. Belyakova, Gamma radiation as a means of disinfection of books against spores of mould fungi, Mikrobiologiya, 29 (1960) 762-765.

[3] R. Ramiere, La desinfection des biens culturels par irradiation gamma. In: Marie-France Roquebert (Ed.), scientifique, les contaminants biologiques des biens culturels, Elsevier, Paris (2002) 291-293.

[4] M.M. Rizzo, L.D. Machado, S.I. Borrely, M.H.O. Sampa, Effects of gamma rays on a restored painting from the XVIIth century, Radiation Physics and Chemistry, 63 (2002) 259-262.

[5] C.D. Negute, V. Bercu, O. Duliu, Defects induced by gamma irradiation in historical pigments, Journal of Cultural Heritage, 13 (2012) 397-403.
[6] Y.G. Saleh, M.S. Mayo, D.G. Ahearn, Resistance of some common fungi to gamma irradiation, Applied and Environmental Microbiology, 54 (1988) 2134-2135.

[7] http://www. xrite.com/ documents/ literature/ L10-001 understand_color_en, A Guide to understanding color communication X-Rite; (03/2007) Printed in U.S.A. xrite.com.

[8] http://www.tera.chem.ut.ee/IR_spectra/Index, Infrared spectra of paint and coating materials; (06/2009) Created by Signe Vahur.

[9] B.H. Berrie (Ed.), Artists٫ pigments. A handbook of their history and characteristics, 4, National Gallery of Art, Washington, (2007).

[10] D.H. Brainard, Color appearance and color-difference specification, In: S.K. Shevell (Ed.), The science of color, Elsevier (2003) 191-216.