Testing method of repellency of paper and paperboard

This technical specification establishes a standardized method for determining the water impermeability of paper and paperboard. It outlines the precise experimental procedures required to measure the resistance of these materials to the passage of water under specific conditions. The methodology defines the necessary apparatus, sample preparation techniques, and the step-by-step process for conducting the test. By following these defined parameters, laboratories can ensure consistent and comparable results when evaluating the barrier properties of paper products. The procedure focuses on the interaction between the material surface and water, providing a reliable assessment of its ability to prevent fluid penetration. This approach supports quality control and material selection processes within industries utilizing paper-based substrates. The standard provides a framework for testing that minimizes variability between different testing environments, facilitating clearer interpretation of material performance data. Adherence to these procedures ensures that measurements are taken uniformly, allowing for accurate comparison of different paper grades or production batches regarding their water resistance characteristics.