标准摘要
[中文适用范围]： 本标准规定了一种通过漫反射法测定纸张不透明度（纸背）的方法。该方法可用于测定含有荧光增白剂的纸张或纸板的不透明度，前提是入射到测试样品上的辐射的紫外（UV）含量已根据ISO 2470-1中描述的方法，使用ISO/TC 6授权实验室提供的荧光参考标准调整为符合CIE照明体C的紫外含量。本标准不适用于含有荧光染料或颜料的有色纸张或纸板。 [外文原描述]： ISO 2471:2008 specifies a method for the determination of the opacity (paper backing) of paper by diffuse reflectance. It can be used to determine the opacity of papers or boards which contain fluorescent whitening agents, provided the UV content of the radiation incident on the test piece has been adjusted to conform to that in the CIE illuminant C using a fluorescent reference standard provided by an ISO/TC 6 Authorized Laboratory as described in ISO 2470-1. ISO 2471:2008 is not applicable to coloured papers or boards which incorporate fluorescent dyes or pigments.
英文名称Paper and board — Determination of opacity (paper backing) — Diffuse reflectance method