1.1 本规程涵盖了根据规程适用于车窗玻璃过滤氙弧装置中塑料暴露的具体程序和试验条件 G151页 和 G155页 用于评估用于室内应用的塑料的稳定性。 1.2 本标准并非旨在解决与其使用相关的所有安全问题（如有）。本标准的用户有责任在使用前制定适当的安全、健康和环境实践，并确定监管限制的适用性。 注1: 目前还没有已知的ISO等同于这种做法。 1.3 本国际标准是根据世界贸易组织技术性贸易壁垒（TBT）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》中确立的国际公认标准化原则制定的。 ====意义和用途====== 4.1 本规程旨在模拟通过玻璃暴露在太阳辐射下产生的影响。本规程使用配备窗户玻璃过滤器的氙弧装置中的曝光，并按照规程操作 G151页 和 G155页 . 注2: 实践 D4674 描述了一种设备中的曝光，该设备使用荧光“冷白”灯和紫外线（UV）灯的组合来模拟室内荧光灯和窗户玻璃过滤日光的曝光效果。 4.2 警告- 当操作条件在本规程的可接受范围内变化时，结果可能会发生变化。因此，所有提及使用本惯例的内容必须随附根据第节编制的报告 9 这描述了使用的特定操作条件。参考实践 G151页 有关适用于使用根据本规程获得的结果的注意事项的详细信息。 注3: 指南中提供了关于可变性来源以及解决实验室加速暴露试验设计、执行和数据分析中可变性的策略的更多信息 G141页 . 4.3 测试结果将取决于按照惯例操作设备时的谨慎程度 G155页 . 重要因素包括线路电压调节、温度和湿度控制、灯具和过滤器的条件和使用寿命。 4.4 当根据与其他材料或对照物相比的性能等级来评估材料的稳定性时，实验室之间测试结果的再现性已被证明是良好的。 4. , 5. 因此，强烈建议在试验材料的同时暴露具有已知性能的类似材料（对照）。对照材料的试样数量应与试验材料相同。建议每种材料至少暴露三次，以便对结果进行统计评估。

1.1 This practice covers specific procedures and test conditions that are applicable for exposure of plastics in window glass-filtered xenon-arc devices in accordance with Practices G151 and G155 for evaluating the stability of plastics intended for use in indoor applications. 1.2 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. Note 1: There is no known ISO equivalent to this practice. 1.3 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 This practice is intended to simulate the effects produced by exposure to solar radiation through glass. This practice uses exposure in a xenon-arc device equipped with window glass filters and operated in accordance with Practices G151 and G155 . Note 2: Practice D4674 describes exposures in a device that uses a combination of fluorescent “cool white” and ultraviolet (UV) lamps to simulate the effects of exposures to indoor fluorescent light and window glass filtered daylight. 4.2 Warning— Variation in results may be expected when operating conditions are varied within the accepted limits of this practice. Therefore, all references to the use of this practice must be accompanied by a report prepared in accordance with Section 9 that describes the specific operating conditions used. Refer to Practice G151 for detailed information on the caveats applicable to use of results obtained in accordance with this practice. Note 3: Additional information on sources of variability and on strategies for addressing variability in the design, execution and data analysis of laboratory accelerated exposure tests is found in Guide G141 . 4.3 Test results will depend upon the care that is taken to operate the equipment in accordance with Practice G155 . Significant factors include regulation of line voltage, temperature and humidity control, and condition and age of the lamps and filters. 4.4 Reproducibility of test results between laboratories has been shown to be good when the stability of materials is evaluated in terms of performance ranking compared to other materials or to a control. 4 , 5 Therefore, exposure of a similar material of known performance (a control) at the same time as the test materials is strongly recommended. The number of specimens of the control material should be the same as that used for test materials. It is recommended that at least three replicates of each material be exposed to allow for statistical evaluation of results.