Fig. 3From: Effects of laser cleaning on the condition of different silk model samples using varying wavelengths and pulse durationsComparison of FTIR spectra of new, unsoiled (green) and aged, unsoiled (purple) silk fabrics. The spectra represent averages of 15 measurements each. A: Amide I C = O stretching vibration of antiparallel β-sheet structure, B: Amide I C = O stretching vibration, C: Amide II N–H in-plane bending and C-N stretching vibrationsBack to article page