VIS–NIR–SWIR microplastics spectral library

This dataset provides a VIS-NIR-SWIR reflectance spectral library of microplastics measured in the 350-2500 nm range. It includes PET, HDPE, PVC, LDPE, PP, and PS samples across different particle-size fractions, colors, and material groups. The CSV files contain wavelength, reflectance, polymer type, color, particle-size fraction, and measurement identifier metadata. The library is intended for spectral comparison, preprocessing, reference matching, and machine-learning-based microplastic classification, and is associated with the Microplastic Spectral Analysis App 3 (MSAA3).