Near-Infrared Spectroscopy for Anticounterfeiting Innovative Fibers

<table>(a) Selected NIR spectra region between 7100 and 9100 cm<sup>−1</sup> for PCA analysis and (b) score plot from PCA analysis of PLA, Kevlar (KA), Spandex (SP), and Sorona (SO) fibers after <svg height="14.85" id="M11" style="vertical-align:-2.22495pt" version="1.1" viewbox="0 0 28.75 14.85" width="28.75" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink">
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</svg> transformation, SNV, and 2nd Savitzky-Golay derivative.</table>

International Scholarly Research Notices

Near-Infrared Spectroscopy for Anticounterfeiting Innovative Fibers

Figure 2