Optical characterization of pigments by reflectance spectroscopy in support of UV laser cleaning treatments

Year: 2008

Authors: Acquaviva S., Danna E., De Giorgi M.L., Della Patria A., Pezzati L.

Autors Affiliation: Univ Salento, Dept Phys, I-73100 Lecce, Italy;
CNR – Istituto Nazionale di Ottica Applicata-Sezione di Lecce, Via Barsanti, 73010, Arnesano (Lecce), Italy;
CNR – Istituto Nazionale di Ottica Applicata, Largo E. Fermi 6, 50125 Firenze, Italy

Abstract: The study of optical properties of artwork materials is of fundamental importance for laser-based restoration techniques. In this work, reflectance spectroscopic measurements and colorimetric analyses of painted wooden models were performed to discriminate between pigments on the basis of their spectral features. In particular, the spectral reflection factors of different white pigments were recorded with a fibre optics reflectance spectroscopy module, both before and after excimer laser (248 nm) irradiation. Colour data were obtained and monitored with an integrating sphere spectrophotometer and expressed with the CIE L(*)a*b* colour coordinates. Moreover, the laser-induced morphological changes of the samples were investigated by scanning electron microscopy.


Volume: 92 (1)      Pages from: 223  to: 227

KeyWords: spectroscopic measurements; colorimetric analyses;
DOI: 10.1007/s00339-008-4486-2

Citations: 9
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