1.1 本规程旨在涵盖夹层玻璃材料暴露于自然和加速天气的程序。 1.2 这种做法仅限于暴露材料的方法和遵循的一般程序。它适用于成品商品以及各种尺寸和形状的试样。 1.3 风化影响的评估方法将取决于试验材料的预期用途。 1.4 以国际单位制表示的值应被视为标准值。SI单位后括号中给出的值仅供参考，不被视为标准值。 1.5 本标准并不旨在解决与其使用相关的所有安全问题（如果有的话）。本标准的使用者有责任在使用前建立适当的安全、健康和环境实践，并确定监管限制的适用性。 1.6 本国际标准是根据世界贸易组织技术性贸易壁垒委员会发布的《关于制定国际标准、指南和建议的原则的决定》中确立的国际公认的标准化原则制定的。 =====意义和用途====== 4.1 根据本规程进行的测试用于评估层压玻璃材料在室外暴露或室内使用时的稳定性。由于紫外线（UV）辐射、湿润时间、温度、污染物和其他因素的差异，户外使用的玻璃的相对耐久性可能因暴露位置而异。因此，不能假设在单个位置的一次暴露结果对确定不同位置的相对耐久性有用。在比较暴露结果时，至少在关键因素方面，暴露位置应尽可能相似，如沉积在试样上的太阳辐射量和速率、暴露期间的温度和湿度水平。 可能需要在代表各种预期使用条件的不同气候的几个地点进行暴露。 4.2 由于年复一年的气候变化，单次暴露试验的结果不能用于预测材料降解的绝对速率。需要几年的重复暴露才能获得给定位置的平均测试结果。 4.3 短期自然和加速暴露试验的结果可以提供相对室外性能的指示，但不应用于预测材料的绝对长期性能。在自然暴露不到12个月的情况下进行的测试结果将取决于开始测试的特定季节。

1.1 This practice is intended to cover procedures for the exposure of laminated glass materials to natural and accelerated weather. 1.2 This practice is limited to the method by which the material is to be exposed and the general procedure to be followed. It is intended for use with finished articles of commerce as well as with all sizes and shapes of test specimens. 1.3 Means of evaluation of the effects of weathering will depend on the intended use for the test material. 1.4 The values stated in SI units are to be regarded as standard. The values given in parentheses after SI units are provided for information only and are not considered standard. 1.5 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use. 1.6 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee. ====== Significance And Use ====== 4.1 Tests conducted in accordance with this practice are used to evaluate the stability of laminated glazing materials when they are exposed outdoors or used indoors. The relative durability of glazing in outdoor use can be very different depending on the location of the exposure because of differences in ultraviolet (UV) radiation, time of wetness, temperature, pollutants, and other factors. It cannot be assumed, therefore, that results from one exposure in a single location will be useful for determining relative durability in a different location. When comparing exposure results, at a minimum, the locations of exposure are to be as similar as possible with regard to critical factors such as the amount and rate of solar radiation deposited on the specimens, temperature and humidity levels during exposure. Exposures in several locations with different climates that represent a broad range of anticipated service conditions may be necessary. 4.2 Because of year-to-year climatological variations, results from a single exposure test cannot be used to predict the absolute rate at which a material degrades. Several years of repeat exposures are needed to get an average test result for a given location. 4.3 The results of short-term natural and accelerated exposure tests can provide an indication of relative outdoor performance, but they should not be used to predict the absolute long-term performance of a material. The results of tests conducted under natural exposure for less than twelve months will depend on the particular season of the year in which they begin.