Fig. 7
From: Lignin nanoparticle-enhanced PVA foils for UVB/UVC protection

Normalized transparency spectra* of PVA films without (Ref) and with varying concentrations of LNP SKL-C1 (a) and EKL-C1 (b). *T/Tmax is used to express the transmittance at each wavelength relative to the maximum transmittance, which allows for a standardized comparison of light transmission across different samples and wavelengths.