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

Figure 8

FTIR spectra in the mid-infrared region of the studied not (exclusively) terpenoid-based resins (black line: shellac, gray line: dragon’s blood) using different analysis modes. From top to bottom: total reflection mode before the KKT correction, total reflection mode after the KKT correction, and transflection mode.