Figure 2
From: Blue and UV LED-induced fluorescence in cotton foreign matter
Matrix 3D scans of non-botanical foreign matter. Non-botanical foreign matter categories have their optimal excitation wavelengths in the UV range, with paper and plastic bale packaging at 360 nm, plastic bag at 370 nm, and twine at 300 nm. Twine optimal emission is also in the UV range (356 nm), while those of paper, plastic bale packaging, and plastic bag are in the visible light range at 412, 434, and 417 nm, respectively.