The model for moisture absorption kinetics was developed and analyzed using Statistica software (Statistica 7.0, Statsoft, Tulsa, Oklahoma, USA). The mean relative error (MRE) as shown in Eq. (3) was determined for each of the experimental runs. It indicates the relative error of the predictions, and values below 10% are indicative of a reasonably good fit for most practical purposes (Garcia-Pascual et al., 2006).