date:May 15, 2020
redicted. Addition of plasticisers or components of low-molecular-weight influences flexibility and permeability of coating material.
Effect on Water Loss
Water vapour permeability is defined as movement of water vapour through a coating material per unit area and thickness. Water loss generally occurs due to evaporation. It describes the vapour pressure difference at a definite temperature and RH. Movement of water vapour is dependent on temperature and relative humidity.
Effect on Gas Exchan