S2 Fig -
Comparative spectral features of: An average spectrum of non-adulterated beeswax samples (N = 88) versus genuine beeswax (reference standard) [A] an average spectrum of non-adulterated comb foundation samples (N = 6) versus genuine beeswax (reference standard) [B]. Wavenumber, the number of waves per unit distance; cm, centimetre; a.u. is for the absorbance unit. (TIF)