Figure 8From: Analysis of natural dyes and metal threads used in 16th -18th century Persian/Safavid and Indian/Mughal velvets by HPLC-PDA and SEM-EDS to investigate the system to differentiate velvets of these two cultures 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.Back to article page