1.1本规程涵盖了标准化的洗涤、模拟阳光和氯化池水暴露，在测试紫外线透射率之前，标记为紫外线（UV）防护的布必须暴露在这些水中。 1.2本规程可测量标记为防晒或紫外线防护的织物或服装在暴露于与季节性使用约两年有关的条件下后的紫外线防护残留水平。可根据AATCC试验方法183，使用根据本实施规程制备的织物进行紫外线透射测量。该测量值可用于支持有关紫外线防护的标签声明。 1.3以国际单位制表示的数值应视为标准。括号中给出的值仅供参考。 1.4 本标准无意解决与其使用相关的安全问题（如有）。 本标准的用户有责任在使用前制定适当的安全和健康实践，并确定监管限制的适用性。 ====意义和用途====== 该实践的意义在于，最终提交用于紫外线透射率测试的标记为紫外线防护的布料将处于模拟其在两年正常季节性使用结束时的状态。因此，最终放置在标签上的紫外线防护水平估计了服装面料在两年生命周期内的最大紫外线透射率。

1.1 This practice covers standardized exposures to laundering, simulated sunlight, and chlorinated pool water to which cloth, labeled as ultraviolet-(UV) protective, must be exposed prior to testing for UV transmission. 1.2 This practice leads to measurement of the residual level of UV-protection in fabrics or garments labeled as sun- or UV-protective, after exposure to conditions that relate to about two years of seasonal use. The UV transmission measurements may be done in accordance with AATCC Test Method 183 using fabrics prepared in accordance with this practice. This measurement may be used in support of a label statement regarding UV protection. 1.3 The values stated in SI units are to be regarded as the standard. The values given in parentheses are for information only. 1.4 This standard does not purport to address the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use. ====== Significance And Use ====== The significance of this practice is that cloth, labeled as UV-protective, which will ultimately be submitted for UV transmittance testing will be in a state that simulates their condition at the end of two years of normal seasonal use. Therefore, the UV-protection level ultimately placed on a label estimates the maximum UV transmittance of the garment fabric during a two-year life cycle.