1.1 本指南用于选择术语、测量尺度和仪器，以描述或评估反射光或透射光的光泽度、不透明度、亮度、透明度和朦胧度等外观特征。本指南不考虑导致颜色的光谱变化，但本文描述的几何变量可能会重要地影响颜色的仪器测量值。本指南的范围是一般性的，而不是具体的仪器或材料。 1.2 本国际标准是根据世界贸易组织技术性贸易壁垒委员会发布的《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。

1.1 This guide is intended for use in selecting terminology, measurement scales, and instrumentation for describing or evaluating such appearance characteristics as glossiness, opacity, lightness, transparency, and haziness in terms of reflected or transmitted light. This guide does not consider the spectral variations responsible for color, but the geometric variables described herein can importantly affect instrumentally measured values of color. This guide is general in scope rather than specific as to instrument or material. 1.2 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.