Heritage Science

Table 1 Summary of PCA Cumulative Variances for all Spectral Subsets across the full spectral region (380–2500 nm); PCs 1–3 and PCs 1–10

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

		% Cumulative	% Variance
Region	Wavelength Range (nm)	PCs 1–3	PCs 1–10
Full Spectrum	380–2500	31.82	56.93
NIR	760–2500	32.94	54.44
	1230–1500	68.80	83.18
	1780–1900	52.32	86.00
	1950–2050	78.42	95.97
	1230–1500 + 1780–1900 + 1950–2050	50.21	75.88
VIS	380–759	74.28	91.83
	380–469	80.70	93.28
	510–555	93.48	98.74
	380–469 + 510–555	79.45	91.48
	579–629	97.67	99.86

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