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

Figure 3

FTIR spectra in the mid-infrared region of the studied lipid materials (black line: carnauba wax, gray line: beeswax, light gray line: shellac wax) 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.