Subsequently, The PVAc undergoes a procedure called alcoholysis (or hydrolysis) within the presence of an alcohol and a robust base or acid catalyst. The acetate groups from the PVAc are replaced by hydroxyl teams, leading to the development of PVA. A thin and water-resistant PVA movie is developed to stop https://www.tjcyindustrialchem.com/news/what-is-pva.html