1.1 本试验方法包括使用特殊类型的照明灯具对涂层表面光泽度差异进行视觉评估。它确定了六个方面或类型的光泽，当使用灯来评估表面之间的光泽差异时，可以寻找。它描述了使用灯具以最好地识别六种光泽中每种类型的微小差异的条件。区分了四个级别的视觉光泽差异。 1.2 虽然该技术适用于风化和未风化试样，但尚未应用于金属。 1.3 以英寸-磅为单位的数值应视为标准值。括号中给出的值是到国际单位制的数学转换，仅供参考，不被视为标准值。 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）。使用本标准的人有责任在使用前咨询并建立适当的安全、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====== 5.1 光泽 3. 与表面在某些方向反射比在其他方向反射更多光的能力有关。与镜面反射（或镜面反射）相关的方向通常具有最高的反射率。当所研究的表面由提供强烈明暗对比图案的光源照明时，可以最好地看到和分析光泽。本试验方法中描述了此类光源。 5.2 光泽最简单的概念是，它对应于表面的镜面反射。然而，这种表面反射光的分布和强度（对于真实材料）高度可变，并受多种因素的影响: 表面平滑度和轮廓、折射率、吸收率、入射角和（通常在较小程度上）波长。从商业材料中遇到的各种表面反射图案中，可以确定七种表面反射标准或熟练技术人员经常使用的“光泽类型”，用于相互比较和评定其产品的光泽。七个标准中的六个或“光泽类型”在定义一节中确定。第七，光泽或对比光泽，很少引起涂料行业的关注。

1.1 This test method covers the visual evaluation of gloss differences of coating surfaces, using special types of lamps for illumination. It identifies six aspects or types of gloss that one may look for when using the lamp to assess gloss differences between surfaces. It describes the conditions for using the lamps to best identify small differences in each of the six types of gloss. Four levels of visual gloss differences are distinguished. 1.2 While this technique is useful for both weathered and unweathered specimens, it has not been applied to metallics. 1.3 The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered standard. 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 whoever uses this standard to consult and 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 ====== 5.1 Gloss 3 is associated with the capacity of a surface to reflect more light in some directions than in others. The directions associated with mirror (or specular) reflection normally have the highest reflectances. Gloss is best seen and analyzed when the surfaces studied are illuminated by a light source that provides strong contrasting patterns of light and dark. Such a light source is described in this test method. 5.2 The simplest concept of gloss is that it corresponds to the mirror-like reflectances of surfaces. However, the distributions and intensities of this surface-reflected light are (for real materials) highly variable and affected by a variety of factors: surface smoothness and contour, refractive index, absorptance, angle of incidence, and (to a generally small extent) wavelength. From the great variety of surface-reflection patterns met in materials of commerce, it has been possible to identify seven surface-reflection criteria or “types of gloss” regularly used by skilled technologists for intercomparing and rating their products for gloss. Six of the seven criteria, or “types of gloss,” are identified in the section on definitions. The seventh, luster or contrast gloss, is seldom of concern to the coatings industry.