Photochemical degradation study of polyvinyl acetate paints used in artworks by Py-GC/MS

► Thermal and photo degradation of PVAc paint samples were studied by Py-GC/MS with double-shot and single-shot techniques. ► Changes of the PVAc paint samples before and after UV ageing were revealed. ► The effects of pigments and ageing status to the degradation of PVAc paint samples were illustrated.