1.1 本试验方法涵盖了仪器要求、标准化程序、材料标准和对表观材料颜色进行精确仪器测量所需的参数。本试验方法旨在涵盖视在材料；例如，汽车涂料、油漆、塑料和油墨。 1.2 本试验方法涉及含金属薄片和颜料的材料的测量。测量含有金属薄片的材料需要三个测量角度来表征试样的颜色。本试验方法不包括含有珠光和干涉材料的材料的光学特性。 注1: 使用本试验方法获得的数据用于gonio外观质量控制目的。该程序可能不一定为空间外观或色素识别提供适当的数据。 1.3 以国际单位制表示的数值应视为标准值。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和健康实践，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====== 5.1 仪器测量角度- 本测试方法旨在提供特定测量角度下的颜色数据，可用于金属薄片着色材料的质量控制、颜色匹配和表征。 5.2 材料- 本试验方法为金属薄片着色材料提供了有意义的颜色信息。该试验方法已在油漆和涂料上进行了测试和验证，相同的原则应适用于含有金属薄片的塑料。对于含有珠光材料的材料，请参阅试验方法 E2539 . 5.3 利用率- 本试验方法适用于金属薄片着色材料的测量和表征。这些数据可用于质量控制、进货检验或颜色校正。 5.4 试样要求- 即使一对试样在三个角度具有相同的颜色值，如果光泽、桔皮、纹理或薄片方向存在差异，它们可能不是视觉匹配。 注2: 本试验方法中提供的信息基于金属材料涂层的数据。 用户应确认本试验方法对其他材料的适用性。

1.1 This test method covers the instrumental requirements, standardization procedures, material standards, and parameters needed to make precise instrumental measurements of the colors of gonioapparent materials. This test method is designed to encompass gonioapparent materials; such as, automotive coatings, paints, plastics, and inks. 1.2 This test method addresses measurement of materials containing metal flake and pigments. The measurement of materials containing metal flakes requires three angles of measurement to characterize the colors of the specimen. The optical characteristics of materials containing pearlescent and interference materials are not covered by this test method. Note 1: Data taken by utilizing this test method are for gonio-appearance quality control purposes. This procedure may not necessarily supply appropriate data for spatial-appearance or pigment identification. 1.3 The values stated in SI units are to be regarded as 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 and health 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 ====== 5.1 Instrumental Measurement Angles— This test method is designed to provide color data at specific measurement angles that can be utilized for quality control, color matching, and formulating in the characterization of metal flake pigmented materials. 5.2 Materials— This test method provides meaningful color information for metal flake pigmented materials. This test method has been tested and verified on paint and coatings, and the same principles should apply to plastics containing metallic flake. For materials containing pearlescent materials refer to Test Method E2539 . 5.3 Utilization— This test method is appropriate for measurement and characterization of metal flake pigmented materials. These data may be used for quality control, incoming inspection, or color correction purposes. 5.4 Specimen Requirements— Even though a pair of specimens have the same color values at three angles, if there are differences in gloss, orange peel, texture, or flake orientation, they may not be a visual match. Note 2: Information presented in this test method is based upon data taken on metallic materials coatings. Applicability of this test method to other materials should be confirmed by the user.