Fig. 5

In plain lines, mass variation (ΔM_num =−  0.57 g) of the “Cannone” violin (on bottom) and its different exchanging parts (on top) over time during the concert number 2 (ΔRH = 13.1%, concert duration TOC = 2.75 h and the mass variation ΔM_exp = − 0.65 g). In the middle part is represented the relative humidity conditions imposed to the violin during the concert. In dashed line is figured the mass variation if the violin was kept in the concert until reaching its mass equilibrium (after about 6 days)