Table 1 Values of the elastic modulus obtained by means of NI-AFM in microsamples of unaltered and altered paint film gathered from the “San Francesc de Paula” painting
Elastic modulus | Unaltered blue paint (GPa) | Altered blue paint (GPa) |
|---|---|---|
Mean value | 6.9 | 10.2 |
Minimum value | 6.0 | 6.3 |
Maximum value | 9.4 | 20.4 |