Fig. 5
From: Characterisation and restoration of a severely damaged paper archive from the Qing Dynasty

Cross-sectional images of the paper sample made from the conservation materials (a1) before and after (b1) dry- and (c1) moist-heat degradation. SEM images of the paper sample made from the conservation materials (a2) before and after (b2) dry- and (c2) moist-heat degradation.