Figure 6From: Thermal degradation of natural dyes and their analysis using HPLC-DAD-MSHPLC-DAD chromatograms of the dye extracted from iron mordanted silk dyeing before and after 7 days of thermal degradation. Numbers in the chromatograms indicate; 1 berberine, 2 palmatine, 3 alizarin, 4 purpurin, 5 indigotin.Back to article page