不同标准体系下纸张的亮度/白度测试

Testing of Paper Brightness/Whiteness According to Different Standards

亮度/白度是纸张一项重要的外观性能和光学性能,二者是两个不同的概念,在测定原理上有着根本的区别。目前纸张亮度/白度测试的主要依据是国家标准、ISO标准和TAPPI标准,不同标准体系所采用的测试方法不同,特别是在光源、几何条件等方面有很大差别,因此采用不同标准体系所测得的结果也存在很大差别。本文阐述不同标准体系下纸张亮度/白度的规范化测量条件,对不同标准体系下纸张亮度/白度的测试方法、测试结果进行对比,并对纸张亮度和白度的关系进行分析。

Brightness/whiteness is one of the most important appearance and optical performance of paper. They are two different concepts, there is fundamental difference between their determination principle. Nowadays testing of paper brightness/whiteness is mainly according to national standards, ISO standards and Tappi standards. Testing methods of different standards are different, the light source and geometry are very different, especially. So testing results are different according to different standards. In this paper, standardized measurement conditions of paper brightness/whiteness according to different standards are introduced, testing methods and testing results of paper brightness/whiteness according to different standards are compared, and the relation between paper brightness and whiteness are analyzed.