Fig. 5

a µ-FTIR spectrum acquired on sample MC4, showing the characteristic peaks of acrylic resin and those related to cellulose compounds (~ 1000, 1634 cm−1); b acrylic resin standard (Paraloid B72 by phase)

a µ-FTIR spectrum acquired on sample MC4, showing the characteristic peaks of acrylic resin and those related to cellulose compounds (~ 1000, 1634 cm−1); b acrylic resin standard (Paraloid B72 by phase)