Moisture sensitive foods and pharmaceuticals are put in packaging with controlled MVTR to achieve the required quality, safety, and shelf life.
Instrument manufacturers are often able to provide test methods developed to fully exploit the specific design which they are selling.
For example, the effect of temperature on the permeability can be as high as 10% per °C, making it possible that MVTR results achieved at 23°C and 37°C can differ by a factor 4.
Seams, creases, access points, and heat seals are critical to end-use performance.
Performance verification and validation of complete containers, structures, or irregular objects is often recommended.