This study investigates the fabrication of a composite film composed of polyvinyl alcohol (PVA) and glycerol. incorporating nanosilica derived from municipal solid waste incinerator bottom ash (BA). The nanosilica is blended with a PVA film-forming solution containing glycerol as a plasticizer. The composite films are characterized using Fourier transform infrared spectroscopy (FTIR). https://foldlyers.shop/product-category/light-meters/