| Summary: | This project was set up by Claude Landes, an expert on old muntins, and the LERM, specialized in the characterization and diagnostic of old metals. Thanks to common research undertaken and to the sampling protocol set up by M. Landes, it is possible to identify the materials constituting the original paintwork on muntins from the seventeenth and eighteenth centuries. From detailed examination of the stratigraphy of several samples, we have characterized the pigments, fillers and binders used in the oldest layers. These analyses have been completed with colourimetric measurements. This research may be carried out from a qualititative and semi-quantitative point of view. In the latter case, it is possible to establish a composition close to the original, enabling the exterior colours of these muntins to be reproduced exactly as they were. The exposé is illustrated by results obtained from a survey of the exterior polychrome work on the Hôtel d’Hallwyl (Paris, 3rd arrondissement), number 17, rue Champollion (Paris, 5th arrondissement), the former Hôtel de Mayenne (Paris, 4th arrondissement), and number 10, avenue de Sceaux in the town of Versailles.
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