Contribution a l'etude des preparations blanches des tableaux italiens sur bois

Abstract

systematic study of the whole thickness of the ground was carried out on about 50 paintings. The originality of the work consisted in first revealing by back -scattered scanning electron microscopy where two types of coating had been used. The components of each layer were then analyzed by X-ray diffraction and found to be principally anhydrite for the gesso grosso and gypsum for the gesso sottile. According to these results, Tuscan painters used a double white ground until the end of the fifteenth century. The use of a single layer of gypsum was widespread in other Italian schools in the fifteenth century.

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