1.1本规程涵盖了国际单位制（缩写为SI）在纸浆、纸张和纸板领域的应用。ISO、ASTM和TAPPI已采用国际单位制作为其标准和测试方法中使用的首选单位。 1.2 ISO标准31和1000的各个部分以及ASTM实践E 380中给出了SI的详细信息。应用这些信息并不总是容易的，因为一些属性此时无法用国际单位制表示，一些属性可以用国际单位制内的各种单位表示，并且可以使用各种倍数。这种变化可能会导致报告测试结果和引用属性值的混乱。 1.3为了克服纸浆、纸张和纸板领域的此类问题，ISO/TC6在ISO标准5651中推荐了适当的单位。 这些建议与其他信息和建议一起在本实践中复制。 ====意义和用途====== 为了改善商业和研究中的沟通，需要统一表达测试结果和引用属性值。 本规程中提供的推荐单位和符号表以及使用规则将有助于实现统一性。

1.1 This practice covers the application of the International System of Units (abbreviated SI) within the field of pulp, paper, and paperboard. The SI units have been adopted by ISO, ASTM, and TAPPI as the preferred units for use in their standards and test methods. 1.2 Details of SI are given in various parts of ISO Standards 31 and 1000, and in ASTM Practice E 380. Application of this information is not always easy, as some properties cannot at this time be expressed in SI, some can be expressed in various units all within SI, and various multiples can be used. Such variation can lead to confusion in reporting test results and in quoting values for properties. 1.3 In order to overcome such problems within the pulp, paper, and paperboard field, ISO/TC6 has recommended appropriate units in ISO Standard 5651. These recommendations are reproduced in this practice, together with other information and recommendations. ====== Significance And Use ====== Uniformity in expressing the results of testing and in quoting property values is needed for improved communication in commerce and research. The table of recommended units and symbols and the rules for using them provided in this practice will aid in achieving uniformity.