标准摘要
[中文适用范围]： 本国际标准规定了测定纸张和板的CIE白度的程序，以获得与其视觉外观对应的白色系数。这些值是在整个可见光谱范围内获得的，并与在室内条件下观测到的纸张和板（无论是否添加荧光增白剂）的亮度因数数据进行对比。本标准基于ISO亮度，该亮度仅限于可见光谱的蓝色区域。本国际标准还指定了CIE色调值和CIE白度中的荧光成分的测定程序，并规定了一种调整紫外线含量的方法，使其与CIE光源C的紫外线含量相当。由于在存在荧光增白剂的情况下获得的结果取决于照射样品的辐射中的紫外线含量，因此采用此方法。CIE光源C被认为代表室内照明条件，因为它含有适当的紫外辐射比例。本标准不适用于含有荧光染料的彩色纸张。该标准仅适用于荧光出现在可见光谱蓝色区域的情况。本国际标准与ISO 2469一起阅读。 [外文原描述]： ISO 11476:2016 specifies the procedure to be used for determining the CIE whiteness of papers and boards, in order to obtain values which correspond to the visual appearance of white papers and boards, with or without fluorescent whitening agents, when they are viewed indoors. It is based on radiance factor data obtained over the full visible spectral range (VIS) in contrast to the measurement of ISO brightness, which is limited to the blue region of VIS. It also specifies the procedures for the determination of CIE tint values and the fluorescent component of CIE whiteness. In addition, it specifies a method for adjustment of the UV-content to correspond to that of CIE illuminant C,[10][12] since the results obtained when fluorescent whitening agents are present are dependent upon the UV-content of the radiation falling upon the sample. The CIE illuminant C is taken to be representative of indoor illumination conditions because it contains a suitable proportion of UV radiation.[7] This method is not applicable to coloured papers containing fluorescent dyes. It is specific to the situation where the fluorescence occurs in the blue region of the visible spectral range. ISO 11476:2016 is read in conjunction with ISO 2469.
英文名称Paper and board — Determination of CIE whiteness, C/2° (indoor illumination conditions)