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The Analysis of Archaeological Pottery Paints by FTIR and Raman Spectroscopy

330 SÁNDORNÉ KOVÁCS Judit • RÉGÉSZETI KERÁMIÁK FESTÉKBEVONATÁNAK VIZSGÁLATA IRODALOM COLTHUP-DALY-WIBERLEY 1964 Colthup, N. B Daly, L. H. - Wiberley, S. E.: Introduction to Infrared and Raman Spectroscopy. New York-London 1964. MAREL BEUTELSPACHER 1976 Marel, H. W. Beutelspacher, H.: Atlas of Infrared Spectroscopy of Clay Minerals and Their Admixtures. Amsterdam 1976. NEUMÜLLER 1982 Neumüller, O. A.: Römpp Vegyészeti Lexikon. Budapest 1982. NOLL 1982 Noll, W.: Antique ceramic decoration techniques. Ceramic Forum International Berichte DKG 59 (1982) 3-11. PALUCH 2011 Paluch T.: Maroslele-Pana: Egy középső neolitikus lelőhely a kultúrák határvidékén. — Maroslele-Pana: A Middle Neolithic Site at the Frontier of Cultures. In: Maroslele-Pana: Egy középső neolitikus lelőhely a kultúrák határvidékén. Szerk.: Balogh Cs. - Lőrinczy G. - Paluch T. Szeged 2011, 9-203. PONS 2005 Pons, G. C.: Earth pigments in painting:characterisation and differentiation by means of FTIR spectroscopy and SEM-EDS microanalysis Anal Bioanal Chem 382 (2005) 269-274. www.irug.org, Infrared and Raman Users Group. Spectral Database 2007 THE ANALYSIS OF ARCHAEOLOGICAL POTTERY PAINTS BY FTIR AND RAMAN SPECTROSCOPY Judit SÁNDORNÉ KOVÁCS The natural scientific analysis of archaeological pottery is not an unheard of method; in a Hungarian context, however, no overall archaeometric experience or comprehensive data have been collected, either on the existing examination methods or on the specific material types. This short report presents the results of Fourier-transform infrared spectroscopic and Raman-spectroscopic analyses of paint remains found on archaeological pottery. By a Fourier-transform infrared spectroscopic analysis it was possible to determine the paint material of the coatings of different colors found on the pottery. This was identified as ochre, that is, an earth pigment. Earth pigments may contain diverse natural additive compounds depending on the geographical location where they are collected. These are usually kaoliné, quartz, sulfate (anhydrite, gypsum), and calcium carbonate. In two cases, the paint remains contained only ochre without any additional chemical compound; the rest of the paint remains contained one specific additional compound, which was quartz. It is noteworthy that in the coating of two white-painted pottery fragments a large amount of calcium carbonate pigment was found in addition to ochre. As calcium carbonate is present in the samples in a much larger ratio than usual, this might indicate that in this case carbonate is not a natural additive but was deliberately mixed into the paint so as to produce the desired hue. Sándorné Kovács Judit Bűnügyi Szakértői és Kutatóintézet 1087 Budapest Mosonyi u. 9. E-mail: juditsk@t-online. hu