Example 1

Paper and board substrates with basis weights of 80 and 237 g/m2, respectively, were delivered by Reynolds Tobacco Company. WVTR was measured at 50%/23° C. and 90%/23° C. from both materials before any coating treatment in order to obtain a reference points which can be used as a benchmark in the assessment of the coating treatment effect in WVTR performance. WVTR results for plain paper and board substrate are shown in FIG. 2. As seen in the results, the permeability values were very high without any coating treatment.

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