On Site Raman Analysis of Kütahya fritwares

Philippe Colomban (1) , Raphaël de Laveaucoupet (1) , Véronique Milande (2)

1 LADIR - Laboratoire de Dynamique Interactions et Réactivité
2 Musée National de Céramique

On site Raman analyses were performed at the Musée national de Céramique, Sèvres, France, on Kütahya pottery. A comparison is made with Iznik and Safavid productions. Two Raman signatures of silicate glazes (with an index of polymerisation ~ 0.6-1 indicating a lead silicate composition, with characteristic Si-O stretching doublet at ~985 and 1050 cm-1) are recognized and associated with the colour. Considering the peak position and the ratios of Qn (n = 1, 2 and 3) components allow for the classification of the different productions. Differentiation between Kütahya and Iznik Ottoman pottery is straightforward from the centres of gravity. The procedure is also efficient to discriminate between early and late Iznik production. The white colour arises from a alpha-quartz slip. Although Iznik production does not fluctuate, as a consequence of the nakkashame regulation, composition/nanostructure dispersion of Kûtahya wares is large and different families can be recognized. The non-stoichiometric character of the spinel-type materials used to draw the black lines appears to be at the origin of the sharpness of the depicted figures.

Mots clés: pottery; glaze; Kütahya; Ottoman; archaeometry; pigment; Raman; spectroscopy

Domaines: Science des matériaux [cond-mat.mtrl-sci]

Philippe Colomban, Raphaël de Laveaucoupet, Véronique Milande. On Site Raman Analysis of Kütahya fritwares. Journal of Raman Spectroscopy, 2005, 36, pp.857-863. ⟨hal-00120410⟩