Abstract: A wrapping material for a smoking article is disclosed, which has a laminar shape that extends further in two mutually orthogonal spatial directions X and Y than in a third spatial direction Z orthogonal to the spatial directions X and Y. The wrapping material has, at least in part of its area, a first and a second diffusion capacity D1 and D2 for a diffusion of CO2 through the wrapping material in the +Z-direction and the ?Z-direction, respectively, wherein for the first and second diffusion capacity D1 and D2, each an average of 10 values, one or both of the following relationships (i) and (ii) hold: |D1?D2|?0.03 cm/s??(i) at a probability of error of 1% 2 ? ? D 1 - D 2 ? D 1 + D 2 ? 0.030 .

Abstract: A wrapping material for a smoking article is disclosed, which has a laminar shape that extends further in two mutually orthogonal spatial directions X and Y than in a third spatial direction Z orthogonal to the spatial directions X and Y. The wrapping material has, at least in part of its area, a first and a second diffusion capacity D1 and D2 for a diffusion of CO2 through the wrapping material in the +Z-direction and the ?Z-direction, respectively, wherein for the first and second diffusion capacity D1 and D2, each an average of 10 values, one or both of the following relationships (i) and (ii) hold: |D1?D2|?0.03 cm/s??(i) at a significance level of 99% 2 ? ? D 1 - D 2 ? D 1 + D 2 ? 0.030 .