Water Vapour Transmission Rate (WVTR) of moulded parts, packages, pouches, bottles, etc. (only suitable for barrier materials, see also "i")

The measurement is carried out by using the the water vapor specific hydrolysis method, which allows to detect even the lowest permeabilities precisely and reproducibly. Besides the standard parameters offered, measurements can be carried out under a wide variety of temperature and humidity conditions. Attention: This method is only suitable for packs with a good water vapour barrier. Materials with high permeation coefficients, e.g. PA, thermoplastic starch or PLA, can not be measured due to excessive permeation.