1.1本规程涵盖自然和人工风化试验之前、期间和之后的样品制备、识别、包装、运输、处理和调节。 1.2本规程包括暴露后和检查前样本调节的详细信息。本规程还涵盖了文件样本的长期存储。 1.3本规程中的调节不是指将试样暴露在风化因子下的具体行为。 1.4 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和健康实践，并确定监管限制的适用性。 注:没有同等的ISO标准描述用于自然或人工风化试验的样品的识别、运输、调节和处理程序。ISO 139和ISO 291描述了在物理性能测试之前和期间调节样本的程序。 ====意义和用途====== 由于天气本身是可变的，因此风化是一门天生可变的科学。此外，即使所有设备运行相同的暴露周期，人工加速测试的结果也可能存在差异。因此，有必要尽可能控制所有因素，以减少整体误差源。 正确处理试样对于保持被评估材料的完整性至关重要。 由于处理和标签不当而造成的样本损坏可能会对测试程序的有效性产生不利影响，造成金钱和时间损失。不当处理可能会将非标准程序引入协议，这可能是变异性的一个重要来源，对获得的结果的整体精度产生不利影响。不正确的处理也可能会在获得的结果中引入偏差。 即使在看似良好的调节环境下，材料也可能发生变化，尤其是在样本已经暴露的情况下。因此，有必要尽量减少非测试期的数量和长度，以使暴露是导致进一步变化的唯一原因。

1.1 This practice covers specimen preparation, identification, packing, shipping, handling, and conditioning before, during, and after natural and artificial weathering testing. 1.2 This practice includes details on the conditioning of specimens after exposure and before examination. This practice also covers long-term storage of file specimens. 1.3 Conditioning in this practice does not refer to the specific act of exposing the specimens to the weathering factors. 1.4 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 and health practices and determine the applicability of regulatory limitations prior to use. Note—There is no equivalent ISO standard describing procedures for identification, shipping, conditioning, and handling of specimens intended for natural or artificial weathering tests. ISO 139 and ISO 291 describe procedures used for conditioning specimens prior to and during physical property testing. ====== Significance And Use ====== Weathering is an inherently variable science due to the fact that weather itself is variable. In addition, there can be variability in results in artificial accelerated testing even when all devices are running identical exposure cycles. Therefore, it is essential to control all factors as much as possible in order to reduce the overall source of error. Proper handling of specimens is extremely important for maintaining integrity of the material being evaluated. Damage to specimens caused by improper handling and labeling can adversely affect the validity of the testing program, causing loss of money and time. Improper handling can introduce nonstandard procedures into the protocol which may be a significant source of variability, adversely affecting the overall precision of results obtained. Improper handling may also introduce a bias in the results obtained. Changes to materials can occur even under a seemingly benign conditioning environment, especially if the specimen has already been exposed. Therefore it is necessary to minimize the number and length of non-testing periods in order that the exposure is the only cause of further changes.