AATCC 111:2015 pdf download.Weather Resistance of Textiles: Exposure to Daylight and Weather
1.1 This test method provides a means for determining the weather resistance of textile materials.
1.2 The test options described below are applicable to fibers, yarns and fabrics and products made therefrom, including coated fabrics, whether natural, colored, finished or unfinished. Test options in- cluded are: Option A—Direct Exposure to Natu- ral Light and Weather Option B—Behind Glass Exposure to Natural Light and Weather without Di- rect Wetting
1.3 Outdoor testing as described under this method must be performed to verify accelerated laboratory testing. It is up to interested parties to determine frequency and scope of outdoor testing. Refer to AATCC Test Method (TM) 169, Weather Resistance of Textiles: Xenon Lamp Exposures, and TM186, Weather Resistance: UV Light and Moisture Ex- posure), for information on the limita- tions of accelerated laboratory testing.
1.4 This test method contains the fol- lowing sections that assist in the use and implementation of the various options for determining the weather resistance of textiles.
2.1 Test specimens and the agreed upon comparison standard(s) are exposed simultaneously to natural weathering, ei- ther Directly or Behind Window Glass, either to a specified degree of degrada- tion such as color change, strength loss, etc., or alternately to a specific amount of radiant energy. Exposures can be timed by calendar days, months, or years as well. However, this method can result in more variation when comparing test ex- posures for equal duration at different time periods. The weather resistance of the material is determined by the exposed portion of the test specimens to an unex- posed counterpart, using one or more of the procedures recommended in this test method.
3.4 broad bandpass radiometer, n.— a relative term applied to radiometers that have a bandpass width of more than 20 nm at 50% of maximum transmittance and can be used to measure irradiance at wavelengths such as 300-400 nm or 300- 800 nm.
3.5 bursting strength, n.—the force or pressure required to rupture a textile by distending it with a force applied at right angles to the plane of the fabric, under specified conditions.AATCC 111 pdf download.