laser (2) Cleaning (2) Antiquities, Prehistoric (2) Science (2) Prehistoric peoples (2) Lasers (2) Cleaning (2) puits (1) rayonnement ultraviolet (1) test (1) pierre (1) argent (1) papier (1) musée (1) matériau (1) irradiation (1) champ (1) énergie (1) poussière (1) dommage (1) cuivre (1) conservation (1) substance chimique (1) céramique (1) densité (1) Florence (1) Handling (1) Color (1) Density (1) Conservation (1)