Figure 4

Evolution of relative humidity measured at the downstream side of samples during the back-face measurements (30–80% RH) (a) and the corresponding zooms (b,c) indicated by grey (b) and black (c) squares in Figure (a).

Evolution of relative humidity measured at the downstream side of samples during the back-face measurements (30–80% RH) (a) and the corresponding zooms (b,c) indicated by grey (b) and black (c) squares in Figure (a).