1.1 本规程涵盖天然橡胶（NR）评估和生产控制的标准材料、试验配方、混合程序和试验方法。 1.2 以国际单位表示的数值应视为标准值。括号中给出的值仅供参考。 1.3 本标准并不旨在解决与其使用相关的所有安全问题（如有）。本标准的使用者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。 1.4 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====== 3.1 本规程主要用于仲裁目的，但也可用于橡胶生产的质量控制。它还可以用于研究和开发工作，以及在标准配方中比较不同的橡胶样品。

1.1 This practice covers the standard materials, test formulas, mixing procedures, and test methods for the evaluation and production control of natural rubber (NR). 1.2 The values stated in SI units are to be regarded as the standard. The values given in parentheses are for information only. 1.3 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. 1.4 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 ====== 3.1 This practice is mainly intended for referee purposes but may be used for quality control of rubber production. It may also be used in research and development work and for comparison of different rubber samples in a standard formula.