Figure 5From: 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 UV-visible spectra of selected samples dyed with unknown yellow dye A (UYD-A). Chromatograms at 350Â nm (A), 300Â nm (B), and 520Â nm (C) of EDTA extracts from samples dyed with UYD-A and from a reference sample dyed with safflower, and UV-visible spectra of selected peaks.Back to article page