纸和纸板.D65/10° CIE白度测定(室外日光

[中文适用范围]： 本文件规定了测定纸张和纸板白度的程序。 获得的值对应于在 CIE D65 日光标准光源下观察时含有或不含荧光增白剂的白纸和纸板的视觉外观。 它基于在整个可见光谱范围 (VIS) 内获得的反射率数据，而 ISO 亮度的测量仅限于 VIS 的蓝色区域。 此外，它还规定了一种调整紫外线含量的方法，以对应于 CIE D65 日光光源[10][11]，只要存在荧光增白剂时获得的结果取决于落在光源上的辐射的紫外线含量。 样本。 它专门针对白色荧光纸样品，其中荧光增白剂 (FWA) 的发射发生在可见光谱的蓝色区域。 本方法不适用于含有荧光染料的彩色纸。 本文件应与 ISO 2469 一起阅读。 注 1 本文件基于 CIE 白度公式，发布于 CIE 15.3-2004[9]。 注 2：相关国际标准 ISO 11476 也已发布，该标准规定了获取与这些产品在室内照明下的外观相对应的值的程序。 [外文原描述]： ISO 11475:2017 specifies the procedure to be used for determining the whiteness of papers and boards. The values obtained correspond to the visual appearance of white papers and boards with or without fluorescent whitening agents when they are viewed under the CIE D65 daylight standard illuminant. It is based on reflectance 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. In addition, it specifies a method for adjustment of the UV content to correspond to the CIE D65 daylight illuminant[10][11], insofar as results obtained when fluorescent whitening agents are present are dependent upon the UV content of the radiation falling upon the sample. It is specific for white fluorescent paper samples where the emission due to the fluorescent whitening agent (FWA) occurs in the blue region of the visible spectrum. This method is not applicable to coloured papers containing fluorescent dyes. ISO 11475:2017 should be read in conjunction with ISO 2469. NOTE 1 This document is based on the CIE whiteness formula, published in CIE 15.3-2004[9]. NOTE 2 A related International Standard, ISO 11476, specifying the procedure for obtaining values corresponding to the appearance of these products under indoor illumination, has also been published.