本试验方法描述了印刷和书写用纸在高浓度下暴露于常见大气污染物气体二氧化氮中的实验室程序，以加速此类纸的老化。本试验方法规定了获得样品所需的样品制备和暴露条件 有关纸张因暴露于常见大气污染气体而引起的机械强度和光学性能变化的相对稳定性的信息。本试验方法提供了有关纸张稳定性的定性结果，但未定义 给定纸张达到指定强度或光学特性的准确预期寿命。限制 每个最终用户必须定义一组特定属性的可接受性，并将决定其使用寿命 预计将要测试的论文数量。

This test method describes a laboratory procedure for the exposure of printing and writing paper to the common atmospheric pollutant gas nitrogen dioxide at elevated levels of concentration to permit accelerated aging of such paper.This test method specifies the sample preparation and conditions of exposure required to obtain information on the relative stability of paper with regard to change in mechanical strength and optical properties brought about by exposure of such paper to common atmospheric pollutant gas.This test method provides qualitative results regarding paper stability and does not define the exact life expectancy for a given paper to reach a specified set of strength or optical properties. The limit(s) of acceptability for a specified set of properties must be defined by each end user and will determine the life expectancy of the paper to be tested.