Molecular Spectroscopy as an alternative for dating Textiles
1 Department of Chemical and Geological Sciences, University of Modena and Reggio Emilia, Via G. Campi, 183, 41125 Modena ( Italy )
2 Anna Tinti, Department of Biomedical and Neuromotorial Sciences, University of Bologna, via Belmeloro 8/2, Bologna ( Italy )
Ancient linen textiles undergo with time a slow change reflected in their Infrared and Raman spectra. The recording of FT-IR and FT-Raman spectra, that reveals a disappearance of some bands and appearance of other ones during the centuries, enables a kinetics of degradation to be followed. Here we discuss the results obtained by using dating methods based on two molecular spectroscopy techniques, that is FT-IR and FT-Raman. A set of samples dating from about 3500 B.C. until present has been examined in order to have an adequate set of reference samples. An accurate analysis of the spectra recorded shows that some differences can be attributed to the evolution of some chemical compounds present in the fibers. A linear correlation between a spectral property and time can be obtained. As an example the date of the Shroud of Turin has been evaluated.
Key words: linen fabric / FT-IR / FT-Raman spectra / dating
© Owned by the authors, published by EDP Sciences, 2015
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