Fig. 4
From: Nano meets the sheet: adhesive-free application of nanocellulosic suspensions in paper conservation
Left: Whatman no. 1 paper treated with BNC (top: ×100 magnification; bottom: ×5000 magnification). A clear borderline between the treated (left) and the untreated (right) areas is visible. The SEM picture (bottom) shows clearly that original structures of papers (thicker fibres) remain intact and recognizable. Right: Whatman no. 1 paper treated with NFC (top: ×100 magnification; bottom: ×5000 magnification). The borderline between the treated (left) and untreated (right) areas is not as clear as with BNC. Also for BNC the structures of the original paper (thicker fibres) remains intact and recognizable