ASTM E96

Substrate Resistance

Material thickness and density influence the final barrier performance measured under these protocols. Variations in coating weight or fibre orientation within a sheet change the tortuosity of the path water molecules must travel to penetrate the surface. Converters often select barrier-coated boards based on these reported values to prevent product degradation during prolonged transport in variable climates.

Accurate evaluation allows technical teams to predict how a package holds up when stored in high-humidity zones before the contents reach the end consumer.

Testing Configuration

Gravimetric balance sensitivity determines the accuracy of the result when calculating low transmission rates for specialized films. Technicians maintain a stable airflow across the surface of the specimen to ensure the measured weight change depends entirely on the material properties rather than the boundary layer of air. Results from these procedures establish the durability of a protective layer against external environmental stressors throughout the supply chain.