SMTL researchers and Dr Steve Thomas (ex-Director of SMTL) have published an interesting paper in the Journal of Wound Care, Oct 2011.
The paper investigates how variations in ambient temperature and humidity can affect the MVTR properties of a dressing, and derives and validates a method which can be used to predict the permeability of semi-permeable films under various combinations of temperature and humidity from a single set of test data.
See: The effect of temperature and humidity on the permeability of film dressings. S. Thomas, L. Barry, P. Fram, P.J. Phillips. Journal of Wound Care, Vol. 20, Iss. 10, 12 Oct 2011, pp 484 - 489.