1.1 本规程涵盖了当材料暴露在典型办公环境中时，使用荧光灯确定塑料颜色稳定性的基本原理和操作程序，其中荧光顶灯和窗户过滤日光用于照明，温度和湿度条件符合美国采暖、制冷学会，以及空调工程师（ASHRAE）对工人舒适度的建议。 1.2 本规程描述了在受控环境条件下将样本暴露于荧光灯下的四种方法。其中两种方法使用提供荧光灯混合的曝光装置，两种方法使用符合实践的装置 G154页 . 注1: 方法一使用冷白色荧光灯和窗户玻璃过滤荧光UVB灯，与本标准先前版本中描述的方法相同。 1.3 ASTM方法或特定材料规范涵盖了样本制备和结果评估。在实践中给出了一般指导 G151页 . 实践中描述了关于确定暴露后性质变化和报告这些结果的方法的更具体信息 D5870 . 1.4 以国际单位制表示的数值应视为标准。 1.5 除非另有规定，否则所有尺寸均为标称尺寸。 1.6 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。 第节给出了具体的预防说明 7. . 注2: 没有已知的ISO等效于本标准。 1.7 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====== 5.1 根据本实施规程进行的测试旨在诱导与典型办公环境中的光和热暴露相关的性能变化。这些暴露不是为了模拟由局部现象（如搬运、污垢污染等）引起的劣化。 注5: 注意事项: 参考实践 G151页 适用于所有实验室风化设备的完整警示指南。有关变异性来源以及通过实验室加速暴露试验的设计和数据分析解决变异性的策略的更多信息，请参见指南 G141页 . 5.2 本实践中描述的不同方法之间可能存在结果差异。 例如，所用灯具光谱分布的差异和单一类型灯具辐照度的变化可能会导致测试结果的显著差异。因此，除非附有根据第节编制的报告，否则不得提及本惯例的使用 12 这说明需要包括对所用方法的引用。 5.3 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。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）。 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 the basic principles and operating procedures for using fluorescent light to determine color stability of plastics when materials are exposed in typical office environments where fluorescent overhead lighting and window-filtered daylight are used for illumination and where temperature and humidity conditions are in accordance with American Society of Heating, Refrigerating, and Air-conditioning Engineers (ASHRAE) recommendations for workers' comfort. 1.2 This practice describes four methods where specimens are exposed to fluorescent light under controlled environmental conditions. Two of the methods use an exposure device that provides for mixing of fluorescent lamps and two of the methods use devices that comply with Practice G154 . Note 1: Method I uses cool white fluorescent lamps and window glass filtered fluorescent UVB lamps and is the same method described in previous versions of this standard. 1.3 Specimen preparation and evaluation of the results are covered in ASTM methods or specifications for specific materials. General guidance is given in Practice G151 . More specific information about methods for determining the change in properties after exposure and reporting these results is described in Practice D5870 . 1.4 The values stated in SI units are to be regarded as the standard. 1.5 Unless otherwise specified, all dimensions are nominal. 1.6 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. Specific precautionary statements are given in Section 7 . Note 2: There is no known ISO equivalent to this standard. 1.7 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 ====== 5.1 Tests conducted in accordance with this practice are intended to induce property changes associated with use exposure to light and heat in typical office environments. These exposures are not intended to simulate the deterioration caused by localized phenomena such as handling, dirt contamination, etc. Note 5: Caution: Refer to practice G151 for full cautionary guidance applicable to all laboratory weathering devices. Additional information on sources of variability and on strategies for addressing variability by design and data analysis of laboratory accelerated exposure tests is found in Guide G141 . 5.2 Variation in results may be expected are possible between the different methods described in this practice. For example, differences in spectral distribution of the lamps used and variations in the irradiance for a single type of lamp can cause significant differences in test results. Therefore, any no reference to the use of this practice should be made unless accompanied by a report prepared in accordance with Section 12 that describes needs to include a reference to the method used. 5.3 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. Therefore, exposure of a similar material of known performance (a control) at the same time as the test materials is strongly recommended. It is recommended that at least three replicates of each material be exposed to allow for statistical evaluation of results.