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Heritage Science
Fig. 6 | Heritage Science

Fig. 6

From: Exploring elucidation of red dye mixtures on woolen historical textiles via non-destructive spectroscopic analysis and multivariate cluster analysis

Fig. 6

PCA scores plots of a the full spectral region 380–2500 nm, b the full NIR region 760–2500 nm, c the high variance 1230–1500 nm subset of the NIR region, d the high variance 1780–1900 nm subset of the NIR region, e the high variance 1950–2050 nm subset of the NIR region, and f the combination of high variance regions shown in (c–e). The different scales are intentional to ease visualization. Color indicates individual swatches

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