AATCC has introduced a new test method, AATCC TM214, to measure accumulated condensation on textile fabrics. The new method applies to clothing systems, tenting fabrics, and medical and technical temporary shelters. The condensation rate is dependent on temperature and vapor pressure across a fabric system.

The method, developed by AATCC Research Committee RA63 Water Resistance Chair, Kiarash Arangdad of Elevate Textiles, measures the water condensation accumulation on the innermost surface of waterproof fabrics in a humid microclimate. During the test, the outermost fabric surface is subjected to dry and wet conditions. The condensation accumulation is determined by calculating the mass change of a filter paper attached to the inner chamber for a prescribed time.

This is the first method to measure condensation created by the microclimate of the textile product. TM214 is a valuable tool for the textile industry to assess the performance of fabrics in wet and dry conditions.

The test apparatus has an inner chamber and an outer chamber and can be conducted inside an environmental chamber or under ambient conditions, making it suitable for use across various textile systems.

The new test method is an important step forward in helping the textile industry better understand the role condensation plays on textile components, particularly with changing climates and a growing focus on sustainability. The insights gained by using this method will help organizations improve and develop new hydrophobic and water-repellent fabric systems.