Eight fragments obtained from historical instruments produced in Cremona (Italy) during the 17th and 18th century have been considered. Both noninvasive and micro-invasive instrumental techniques were carried on to directly highlight the treatments employed on the wood before varnishing. Scanning Electron Microscopy performed on cross sections highlights the presence of two different methods of wood treatment, in order to inhibit the penetration of the varnish into the porous structures. In one set of fragments, the wood was treated with a filler made with gypsum dispersed in an organic medium. A mechanical treatment or a digestion of the wood structures with a basic solution, which caused a collapse of superficial tracheary elements, was employed on the other fragments.
Giacomo Fiocco, Monica Gulmini, Tommaso Rovetta, Curzio Merlo, Marco Malagodi
FIOCCO, GIACOMO;ROVETTA, TOMMASO;MALAGODI, MARCO
2016-01-01
Abstract
Eight fragments obtained from historical instruments produced in Cremona (Italy) during the 17th and 18th century have been considered. Both noninvasive and micro-invasive instrumental techniques were carried on to directly highlight the treatments employed on the wood before varnishing. Scanning Electron Microscopy performed on cross sections highlights the presence of two different methods of wood treatment, in order to inhibit the penetration of the varnish into the porous structures. In one set of fragments, the wood was treated with a filler made with gypsum dispersed in an organic medium. A mechanical treatment or a digestion of the wood structures with a basic solution, which caused a collapse of superficial tracheary elements, was employed on the other fragments.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
