标准摘要
[中文适用范围]： 本部分 ISO 2470 规定了测量纸浆、纸张和纸板的 D65 亮度的方法。本部分 ISO 2470 的适用范围仅限于白色和近白色纸浆、纸张和纸板，特别是那些表现出促进白度外观的荧光特性的材料。测量只能在仪器中进行，该仪器中的照明紫外线能量水平已使用荧光参考标准调整至与 CIE 标准照明体 D65 相对应。本部分 ISO 2470 中采用的光源激发的荧光几乎是 ISO 2470-1 中照明体激发的两倍。因此，本部分 ISO 2470 更适合测量荧光对亮度的贡献。然而，D65 亮度不应与 ISO 亮度混淆，ISO 亮度非常接近室内条件下观察到的纸张亮度。注：称为 ISO 亮度的属性是使用紫外线含量远低于本部分 ISO 2470 中规定的仪器进行测量的。ISO 亮度的测量方法在 ISO 2470-1 中描述。 [外文原描述]： ISO 2470-2:2008 specifies a method for measuring the D65 brightness of pulps, papers and boards. ISO 2470-2:2008 is limited in its scope to white and near-white pulps, papers and boards, particularly those exhibiting fluorescence which promotes the appearance of whiteness. The measurement can only be made in an instrument in which the ultraviolet energy level of the illumination has been adjusted to correspond to the CIE standard illuminant D65 using a fluorescent reference standard. The source employed in ISO 2470-2:2008 excites almost twice as much fluorescence as the illuminant in ISO 2470-1. Consequently, ISO 2470-2:2008 is better suited for measuring the fluorescent contribution to the brightness. However, D65 brightness should not be confused with ISO brightness which closely approximates the brightness of papers viewed under indoor conditions.
英文名称Paper, board and pulps — Measurement of diffuse blue reflectance factor — Part 2: Outdoor daylight conditions (D65 brightness)