1.1 这些测试方法涵盖了评估橡胶在接触或接近另一个浅色表面时可能引起的三种染色的技术。 1.2 试验方法还描述了如何定性评估在单独暴露于热或热与光的条件下产生的染色程度。 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。 1.5 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 与浅色有机饰面接触的橡胶可能会污染与橡胶接触的表面（接触染色）以及与橡胶相邻或超出橡胶的表面（迁移染色），尤其是在高温、压力或阳光下。当浅色橡胶单板或有机涂层覆盖染色橡胶化合物时，染色成分可以通过单板或涂层扩散并染色表面（扩散染色）。消费者不喜欢这种浅色表面的染色。 5.2 这些试验方法提供了一种评估橡胶化合物染色特性的方法，但不一定会重复自然暴露条件的影响。 5.3 获得的结果不应被视为等同于任何自然暴露，除非根据经验确定了相关材料的定量相关性程度。 5.4 这些测试方法可用于生产者-消费者验收、仲裁目的以及研发工作。 5.5 这两种曝光（荧光紫外线和氙弧）并不等同，可能会产生不同的测试结果。

1.1 These test methods cover techniques to evaluate three types of staining that rubber may cause when in contact with, or in proximity to, another surface that may be light colored. 1.2 The test methods also describe how to qualitatively evaluate the degree of staining produced under the conditions of exposure to heat alone or heat and light. 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 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. 1.5 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 Rubber in contact with light colored organic finishes may stain the surfaces in contact with the rubber (contact staining) and surfaces adjacent to or beyond the rubber (migration staining), especially under conditions of heat, pressure, or sunlight. When a light colored rubber veneer or organic coating covers a staining rubber compound, the staining ingredients can diffuse through the veneer or coating and stain the surface (diffusion staining). This staining of light colored surfaces is objectionable to the consumer. 5.2 These test methods provide a means of evaluating staining characteristics of rubber compounds but may not necessarily duplicate the effects of natural exposure conditions. 5.3 Results obtained should not be treated as being equivalent to any natural exposure, unless the degree of quantitative correlation has been empirically established for the material in question. 5.4 These test methods may be used for producer-consumer acceptance, referee purposes, and research and development work. 5.5 The two types of exposures (Fluorescent UV and Xenon Arc) are not equivalent and may produce different test results.