Figure 9
From: Rheoreversible hydrogels in paper restoration processes: a versatile tool
mid-FTIR ATR spectra of soiled paper samples, aged and cleaned. The figure shows in panel A the results obtained for paper samples untreated (red line), treated with PEO hydrogel (black line), or with PLU hydrogel (blue line); and in panel B untreated (red line) and washed with water (green line).