Microstructure d'une plaque d'email peint de Limoges du XVIe siecle

Abstract

This work results from a multidisciplinary approach by a working group for the conservation of Limoges painted enamels made between the end of the fifteenth century and the last quarter of the sixteenth century. Microprobe analysis of a fragment from an enamelled plaque, the work of M.D. Pape, provided the complete stratigraphy of the enamel. Starting from the copper plate, three layers of glass were identified and analyzed quantitatively, revealing enamels of high lead content with an intermediate sodium-potassium glass. Each layer has a specific heterogeneous character, which provides information on the technology of these enamels. A sample from another plaque of an earlier period (Tryptique de I'Annonciation, Musée d'Orléans, c. 1500) revealed a strong red coloration in the first layer of enamel next to the copper, which has also been analyzed by microprobe. Chemical analysis of the different types of glass is supplemented by information concerning the origin and the restoration of the enamelled plaque by M. D. Pape.

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