Figure 8
Chromatograms and the UV-visible spectra of selected brown and black samples. Chromatograms at 450Â nm (A) and 350Â nm (B) of HCl extracts from brown and black samples and the UV spectra of brazilein derivative, type C component and ellagic acid. Chromatograms at 350Â nm of EDTA extracts from samples of the light green pile and of the yellow foundation warp and weft of acc. no. 1983.494.7b are also shown to indicate the presence of Type C component in those samples.
