1.1 本试验方法包括通过筛分保留法测定油墨分散体中粗颗粒的重量浓度。 1.2 本试验方法适用于含有大于45μm颗粒的印刷油墨、冲洗过的颜料和其他颜料分散体。通过适当选择溶剂，它适用于糊状和液体油墨。 注1: 该试验方法原则上与试验方法相似 D185 . 对于25μm以下的颗粒，见测试方法 D1316 . 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====== 4.1 油墨中的粗颗粒会降低分散过程的效率，不仅需要额外的研磨过程，还需要频繁更换泵过滤器。在印刷过程中，它们可能会导致金属板过度磨损，油墨在毯子和印版上堆积或局部滞留，以及水平衡问题。粗颗粒还会降低印刷品的颜色强度和光泽。 4.2 本试验方法适用于质量控制。通过使用大于规定尺寸的试样，可以提高精度。 4.3 测试结果对所用冲洗溶剂的类型敏感。应避免使用强溶剂，因为它们可能会溶解油墨载体中的大颗粒树脂。

1.1 This test method covers the determination of the weight concentration of coarse particles in printing ink dispersions by sieve retention. 1.2 This test method is applicable to printing inks, flushed pigments, and other pigment dispersions that contain particles larger than 45 μm. With proper choice of solvent, it is applicable both to paste and liquid inks. Note 1: This test method is similar in principle to Test Methods D185 . For particles under 25 μm, see Test Method D1316 . 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 ====== 4.1 Coarse particles in printing inks reduce the efficiency of the dispersion process, requiring not only extra milling passes, but also frequent changes in pump filters. In printing processes, they may cause excessive wear to metal plates, piling or localized retention of ink on blankets and plates, and water balance problems. Coarse particles also reduce color strength and the gloss of printed matter. 4.2 This test method is suitable for quality control. The precision may be improved by the use of a specimen size larger than that prescribed. 4.3 Test results are sensitive to the type of washout solvent used. Strong solvents are to be avoided because they may dissolve large particles of resin in the ink vehicle.