BS ISO 11475:2017规定了用于测定纸张和纸板白度的程序。所获得的值对应于有无白纸和白板的视觉外观 在CIE D65日光标准光源下查看荧光增白剂。它基于在整个可见光谱范围（VIS）内获得的反射率数据，而不是 ISO亮度的测量，仅限于可见光的蓝色区域。此外，它还规定了调整紫外线含量的方法，以符合CIE D65 日光光源[10][11]，只要存在荧光增白剂时获得的结果 取决于落在样品上的辐射的紫外线含量。这是专为白人设计的 荧光纸样品中因荧光增白剂（FWA）而产生的辐射 可见光谱中的蓝色区域。 此方法不适用于含有荧光染料的彩色纸张。本文件应结合ISO 2469阅读。注1:本文件基于CIE 15.3-2004[9]中发布的CIE白度公式。注2:相关国际标准ISO 11476规定了获取数值的程序 与这些产品在室内照明下的外观相对应，也已出版。交叉引用:ISO 2469:2014 ED5ISO 186:2002（R07）Ed 4ISO 4094:2005（R07）Ed 2 ASTM E308-08ISO/TR 24498:2006 Ed 1ISO 11664-2:2007 Ed 1ISO 11664-1:2007 Ed 1ISO 3688:1999ISO 2470-2:2008ISO 11476:2016购买本文件时提供的所有当前修订版均包含在购买本文件中。

BS 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.This document 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.Cross References:ISO 2469:2014 ED5ISO 186:2002 (R07) Ed 4ISO 4094:2005 (R07) Ed 2 ASTM E308 - 08ISO/TR 24498:2006 Ed 1ISO 11664-2:2007 Ed 1ISO 11664-1:2007 Ed 1ISO 3688:1999ISO 2470-2:2008ISO 11476:2016All current amendments available at time of purchase are included with the purchase of this document.