This characteristic of the surface had some effect on other properties of the film as found in mesquite gum–candelilla wax based edible emulsion coatings (Bosquez-Molina et al., 2003).
When oleic oil was added, there were bumps and holes scattered all over the film. In film adding mineral oil, the oil congregated and were all blended. In smooth films, the WVP value was the lowest.