1.1 这些试验方法包括在0.1s的剪切速率范围内测定非牛顿材料的表观粘度、剪切稀化和触变性能 −1. 至50秒 −1. 使用旋转粘度计在600 mL低型格里芬烧杯中的流体中工作。 1.2 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。 1.3 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。 1.4 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 试验方法A用于确定给定转速下的表观粘度，尽管两个或两个以上转速下的粘度比单个粘度测量更好地表征非牛顿材料。 3.2 对于试验方法B和C，剪切变稀程度通过粘度随转速增加而下降来表示。触变程度通过比较转速升高和降低时的粘度（试验方法B）、粘度恢复（试验方法B）或高剪切前后的粘度（试验方法B和C的组合）来表示。试验方法C中的高剪切处理近似于涂漆过程中的剪切。高剪切后测得的粘度行为表明涂料在涂覆后不久的特性。

1.1 These test methods cover the determination of the apparent viscosity and the shear thinning and thixotropic properties of non-Newtonian materials in the shear rate range from 0.1 s −1 to 50 s −1 using a rotational viscometer operating in a fluid contained in a 600 mL low form Griffin beaker. 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 Test Method A is used for determining the apparent viscosity at a given rotational speed, although viscosities at two or more speeds give better characterization of a non-Newtonian material than does a single viscosity measurement. 3.2 With Test Methods B and C, the extent of shear thinning is indicated by the drop in viscosity with increasing rotational speed. The degree of thixotropy is indicated by comparison of viscosities at increasing and decreasing rotational speeds (Test Method B), viscosity recovery (Test Method B), or viscosities before and after high shear (combination of Test Methods B and C). The high-shear treatment in Test Method C approximates shearing during paint application. The viscosity behavior measured after high shear is indicative of the characteristics of the paint soon after application.