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