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We used Raman spectroscopy combined with multivariate analysis to study noninvasively naturally and artificially aged samples of silk and wool fibres dyed with turmeric and saffron dyes, following historical recipes. The Raman spectra obtained from all the samples using the two excitation lasers (785 and 1064 nm) showed the characteristic peaks of each dye and fibre. The 1064‐nm macro FT‐Raman offered...
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