1.1 本试验方法涵盖了测量着色乳胶漆中颜色发展的程序，目的是确定着色剂的效率、基础漆的着色性和所涂漆膜颜色均匀性差的可能性。 1.2 以国际单位制表示的数值应视为标准值。国际单位制后括号中给出的值仅供参考，不被视为标准值。以国际单位制表示的数值应视为标准值。括号中给出的值是英寸-磅单位的数学转换，仅供参考，不被视为标准值。 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====== 5.1 由于兼容性差，着色剂有时无法在底漆中完全分散，这可能是着色剂、油漆或两者的缺陷。这将导致显色不良，这很容易通过使用刮墨刀涂抹油漆并通过手指摩擦部分干膜的一小部分使其下降到高剪切应力的常见程序来体现。这往往会分散未显影的着色剂（如有），并在漆膜的无毛刺和剪切区域之间产生颜色变化。 可以通过比色法测量变化，得出数字色差值，该值是原始油漆颜色发展的测量值，差异越小，颜色发展越好，反之亦然。通过手指摩擦获得的色差值对于同一操作人员以及不同操作人员差异很大。该试验方法建立了类似于手指摩擦试验的受控剪切应力程序，但具有更好的再现性。 5.2 颜色显影不良可能是涂料生产及其现场性能的一个问题。在生产中，它会导致着色剂货币价值的损失，以及不可预测的着色结果。在现场性能中，由于油漆在不同阶段或不同应用模式下受到的剪切力不同，因此会导致所涂漆膜的颜色变化。 5.3 虽然显色不良主要且最常见的是与着色涂料的着色剂部分有关，但由于絮凝或其他原因，底漆中的白色颜料也可能显色不良。在后一种情况下，剪切分散可以使漆膜更轻、颜色更少，而不是相反。然后，着色剂和白色也可能发育不良，剪切应力引起的颜色变化将是两者的综合效应。 5.4 在任何情况下，显色都是一种重要的油漆特性，本试验方法旨在提供一种普遍接受且可重复的试验方法。

1.1 This test method covers a procedure for measuring color development in tinted latex paints, for the purpose of determining the efficiency of colorants, the tintability of base paints and the potential for poor color uniformity of applied paint films. 1.2 The values stated in SI units are to be regarded as standard. The values given in parentheses after SI units are provided for information only and are not considered standard. The values stated in SI units are to be regarded as standard. The values given in parentheses are mathematical conversions to inch-pound units that are provided for information only and are not considered standard. 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 ====== 5.1 A colorant sometimes fails to disperse completely in a base paint due to poor compatibility, which can be the fault of the colorant, the paint, or both. This will result in poor color development, which is readily manifested by the common procedure of applying the paint with a doctor blade and subjecting the drawdown to high shear stress by finger-rubbing a small area of the partially dry film. This tends to disperse undeveloped colorant, if any, and produces a color variation between the unsheared and sheared areas of the paint film. The variation can be measured colorimetrically to give a numerical color difference value that is a measure of the color development of the original paint, the smaller the difference the better the color development and vice versa. Color difference values obtained by finger-rubbing were found to vary widely for the same as well as among different operators. This test method establishes a controlled shear-stress procedure analogous to the finger rub-up test, but with far better reproducibility. 5.2 Poor color development can be a problem in the production of paints, and in their performance in the field. In production it causes a loss of colorant monetary value, and unpredictable tinting results. In field performance it results in color variations in the applied paint film due to the varying shear forces to which the paint is subjected at different stages or by different modes of application. 5.3 Although poor color development is primarily and most often related to the colorant portion of a tinted paint, the white pigment in the base paint can also be poorly developed due to flocculation or other causes. In the latter case, shear dispersion can make the paint film lighter and less colorful, rather than the reverse. Then too, the colorant and the white might both be poorly developed, and the color change due to shear stress would then be the combined effect of both. 5.4 In any case, color development is an important paint property, for the measurement of which this test method is intended to provide a generally accepted and reproducible test method.