此方法用于在75度（与纸张平面成15度）时测量纸张的镜面光泽度。虽然它的主要用途是涂布纸（1），但它也用于各种非涂布纸。这种方法适用于低光泽到高光泽的纸张。对于非常高光泽的纸张，如铸涂、上漆、高清漆（2-4）或蜡纸（5）和高光泽油墨膜（6），TAPPI T 653纸和纸板的特殊光泽最好为20度。T 480已被证明适用于纸张或纸板上大多数油墨膜的光泽度测量。这些油墨膜的颜色和漫反射系数的差异对测量的光泽度的影响可以忽略不计。例如，当测试其他方面相同的白色和黑色表面时，白色表面的光泽度比黑色表面高不到一个单位。 该方法不测量图像反射质量-A092-4D88-A654-98C8D

This method is for measuring the specular gloss of paper at 75 degrees (15 degrees from the plane of paper). Although its chief application is for coated papers (1), it is also used for a variety of uncoated papers.This method is suitable for low- to high-gloss papers. For very high-gloss papers such as cast-coated, lacquered, highly varnished (2-4) or waxed papers (5), and high-gloss ink films (6), TAPPI T 653Specular Gloss of Paper and Paperboard at 20 Degreesis preferred. T 480 has been shown to be suitable for gloss measurements of most ink films on paper or paperboard. Differences in the color and diffuse reflectance of these ink films have a negligible effect on measured gloss. For example, when white and black surfaces which are otherwise identical are tested, the white surface will measure less than one gloss unit higher than the black.This method does not measure image-reflecting quality.-A092-4D88-A654-98C8D