Mid and Near-Infrared Reflection Spectral Database of Natural Organic Materials in the Cultural Heritage Field

Figure 2

FTIR total reflection mode spectra in the near-infrared region of the studied (a) proteinaceous materials, (b) polysaccharide materials, (c) diterpenoid resins, (d) triterpenoid resins, and (e) not (exclusively) terpenoid-based resins.

(a)

(b)

(c)

(d)

(e)