Chromatic alteration on marable surfaces analysed by molecular biology tools

The surfaces of works of art exposed to specific environment with which they interact, are subject to a high number of exchanges and reactions leading to the creation of the “natural patina”, through the surface alteration. This definition already explains its genesis and stands as the consequence of a natural phenomenon of surface alteration of the matter. Cesare Brandi defined patina as “that particular characterization of the surface of a historical, cultural, artistic work deriving exclusively from the natural and usual stabilization and modification process that the materials of the surface undergo because of the interaction with outdoor agents characterizing the surrounding environmen…