1.1 本试验方法涵盖了测定油墨、载体和类似液体的落棒粘度和非牛顿行为程度的程序，这些液体在普通室内条件下基本上不挥发和不反应。 1.2 对于通常为非牛顿型的印刷油墨，本试验方法适用于表观粘度范围为10至300 P，剪切速率为2500 s −1. . 对于牛顿液体，适用的粘度范围约为10至1000 P（1 P = 0.1 Pa·s）。 1.3 本试验方法使用落杆粘度计，通过手动向杆添加重量来改变剪切条件。试验方法中描述了一种全自动仪器 D6066 . 1.4 本试验方法和试验方法 D6066 ，基于粘度的幂律模型进行计算。ISO 12644不仅涵盖幂律，还涵盖Casson和Bingham模型。 1.5 以国际单位制表示的数值应视为标准值。本标准不包括其他计量单位。 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。 有关具体的危险说明，请参阅第节 8. . 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 2500 s相对较高剪切速率下的表观粘度 −1. 不能完全定义印刷油墨的流变特性，但有助于在生产过程中实际控制油墨粘度，以及供应商和买方之间的规格验收。 5.2 幂律图的斜率是非对称性的首选度量- 牛顿主义。通过将高剪切测量外推到接近零的剪切速率获得的屈服值不符合真实屈服应力的定义（参见 3.1.7 ). 屈服值和其他低剪切参数也具有高度的可变性（见第节中的精度表） 16 ).

1.1 This test method covers the procedure for determining the falling-rod viscosity and degree of non-Newtonian behavior of printing inks, vehicles, and similar liquids that are essentially nonvolatile and unreactive under ordinary room conditions. 1.2 For printing inks, which are typically non-Newtonian, this test method is applicable in the apparent viscosity range from about 10 to 300 P at a shear rate of 2500 s −1 . For Newtonian liquids, the applicable viscosity range is about 10 to 1000 P (1 P = 0.1 Pa·s). 1.3 This test method uses a falling-rod viscometer in which shear conditions are altered by manually adding weight to the rod. A fully automatic instrument is described in Test Method D6606 . 1.4 This test method, as does Test Method D6606 , bases calculations on the power law model of viscosity. ISO 12644 covers not only the power law but also the Casson and Bingham models. 1.5 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard. 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. For specific hazard statements, see Section 8 . 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 Apparent viscosity at the relatively high shear rate of 2500 s −1 does not completely define the rheological properties of printing inks but is useful in the practical control of ink viscosity during production and the specification acceptance between supplier and purchaser. 5.2 The slope of the power law plot is the preferred measure of non-Newtonianism. The yield value, which is obtained by extrapolation of high-shear measurements to a shear rate approaching zero, does not conform to the definition of the true yield stress (see 3.1.7 ). The yield value and other low shear parameters are also subject to a high degree of variability (see the precision table in Section 16 ).