Ancient Deteriorated Paper: Washing and Restoring Processes as studied by 13C CP-MAS NMR Spectroscopy

13C CP-MAS NMR Spectroscopy has been used as an analytical tool establishing the best procedure in whitening ancient deteriorated paper. NMR suggests that the soaking in water, able to obtain a remarkable cleaning of the paper itself, is the best procedure for the elimination of soluble cellulose fractions containing oxidized carboxyl groups