... and of the paint layer, the characteristic“touche” of the author, the eventual existence of an underlying painting, the pentimenti, the alterations, the restorations, the modifications of frame, ... collaborate with the network. The main characteristics of these institutions, together with a database on the techniques used and the cultural areas in which they are working are mentioned in the websitehttp://www.chim.unipg.it/chimgen/LabS ... Determination of the nature of component materials of an artefact 42.2. Dating 52.3. Determination of the creative process of a material or of the artefact itself 52.4. Evaluation of the suffered...