Purpose of Test This test evaluates the resistance of a fabric to water penetration caused by hydrostatic pressure. This test is used for all kinds of fabrics, whether they are water-resistant or water-repellant. The test results for this method depend on the water repellency of the following materials used: Fibers Yarns Fabric construction Fabric finish… Continue reading AATCC 127 Test Method for Water Resistance: Hydrostatic Pressure