Fig. 10From: Exploring elucidation of red dye mixtures on woolen historical textiles via non-destructive spectroscopic analysis and multivariate cluster analysisa PCA scores plot showing PCs 1 and 2 of the VIS region identical to Fig. 7b with HPLC-identified samples overlaid and colored based on identification—black (CM), cyan (CMF), orange (C), steel blue (CF), and purple (CB), and b a 3D scores plot of the same information showing PC scores 1–3Back to article page