本文件规定了无线电波传输应用产品的装饰性金属涂层的名称和表征方法。名称包括无线电波的传输损耗、考虑中的无线电波频带、零件的亮度和色调，以及金属涂层的主要材料和制造工艺。表征方法包括确定特定频带无线电波的传输损耗，以及评估代表颜色和外观的亮度和色调。

This document specifies the designation and the characterization methods of the decorative metallic coatings of the products for radio wave transmissive application. The designation consists of the transmission loss of the radio wave, the frequency band of the radio wave under consideration, the lightness and hue of the parts, as well as the main material and manufacturing process of metallic coatings. The characterization methods consist of the determination of the transmission loss of radio wave with specific frequency band and the evaluation of lightness and hue which represent the colour and appearance.