Micro-perforated films are flexible films having micro perforations used for packaging providing the opportunity to modify the oxygen transfer rate of packaging in accordance with the packaged product. Most stationary experimental systems are used for calculating the permeability of micro-perforated films, since the flow of gas through the perforation majorly follows gas diffusion mechanisms. Micro-perforated films with one and three perforations are expected to provide ample O2 and CO2 equilibrium concentrations.