Sampling Instruments |
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| Abstract: | Abstractsystematic 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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