Reflectance FT-IR spectroscopy as a viable option for textile fiber identification

Heritage Science

Table 2 Classification results for all five samples from the scarf

Sample nr	r-FT-IR		mATR-FT-IR		Final result
Sample nr	DA	RF	DA	RF	Final result
1	Jute	Wool/jute	Polyacrylic	Silk/sisal	Unambiguous identification with IR impossible, see text
2	Silk/jute/wool	Jute/silk	Jute/polyacrylic	Sisal/viscose/silk	Unambiguous identification with IR impossible, see text
3.1	Jute/cotton	Linen/cotton/jute	Jute/cotton	Linen/cotton/jute	Cotton^a
3.2	Silk	Silk	Silk	Silk	Silk
4	Jute	Jute/wool/viscose	Jute	Viscose/jute	Unambiguous identification with IR impossible, see text
5.1	Viscose/cotton/jute	Cotton/viscose/linen	Jute	Viscose	Viscose^a
5.2	Silk	Silk	Silk	Silk	Silk

DA discriminant analysis classification, RF random forest classification. Assignments separated by “/” correspond to individual assignments from the same textile piece
^a For final identification, additionally microscopic analysis was used