Du Tibre au Loing. Étude et conservation-restauration du Portrait d'Alexandre Dumeis peint par Eugène Signol (Rome - 1835 ; musée Girodet, Montargis). Désacidification des toiles à l'aide des Nanorestore Paper®, étude de l'impact du traitement sur la cou…

This master’s work is dedicated to the study and conservation of the Portrait of Alexandre Dumeis from the musée Girodet de Montargis. This easel painting, done by Eugène Signol in Rome in 1835 is understood in the context of the training journey carried out by the artists at that time. The technical study revealed the traces of an Italian montage of the nineteenth century with « sprigs », long pins whose heads were bent against de strecher edge. The change of strecher and format suffered by the work at the end of the 19th century is the main cause of the alterations that occurred on the canvas support. The treatment of a 19th century canvas impregnated with oil and varnish on the back has led to question the acidity of the cellulosic support and the treatments proposed to curb this degradation. An experimental study was therefore conducted to better understand the impact of deacidification products on oil-based paint layers. The portrait received a fundamental treatment of conservation of its support and the pictorial layer. Conservation-restoration interventions have stabilized the work and have made the composition easier to read.