AATCC 22-2001

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Water Repellency: Spray Test
standard by American Association of Textile Chemists and Colorists, 01/01/2001

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1. Purpose and Scope

1.1 This test method is applicable to any textile fabric, which may or may not have been given a water-repellent finish. It measures the resistance of fabrics to wetting by water. It is especially suitable for measuring the water-repellent efficacy of finishes applied to fabrics, particularly plain woven fabrics.

2. Principle

2.1 Water sprayed against the taut surface of a test specimen under controlled conditions produces a wetted pattern whose size depends on the relative repellency of the fabric. Evaluation is accomplished by comparing the wetted pattern with pictures on a standard chart.

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