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Abstract

The Fourier transform Raman spectra of silk at several stages of its processing from raw natural and cultivated cocoons to woven fabric were obtained. The application of near-infrared excitation to the recording of quality Raman spectra from bulk samples, including Russian and Chinese varieties, and from a single 10 μm fibre is demonstrated. Comprehensive vibrational assignments are made for silk and comparisons are made of wild and cultivated silks, bleached and unbleached de-gummed varieties and inner and outer cocoon material.