ISO 302:2015规定了纸浆卡伯值的测定方法。卡伯值表示纸浆的木质素含量或可漂白性。 ISO 302:2015适用于卡伯值范围为1至100的所有化学浆和半化学浆。对于卡伯值超过100的纸浆，使用氯消耗程序（ISO 3260）来描述脱木素程度。 为了达到最大的精度和准确度，必须调整样本量，使高锰酸盐的消耗量在添加量的20%到60%之间。 注:纸浆的卡伯值和木质素含量之间没有一般明确的关系。这种关系因木材种类和脱木素程序而异。 所有被高锰酸钾氧化的化合物，不仅仅是木质素，都会增加高锰酸钾的消耗，从而增加卡伯值。[8] 如果要使用卡伯值得出纸浆木质素含量的指数，则必须为每种纸浆类型建立特定的关系。

ISO 302:2015 specifies a method for the determination of the Kappa number of pulp. The Kappa number is an indication of the lignin content or bleachability of pulp. ISO 302:2015 is applicable to all kinds of chemical pulps and semi-chemical pulps within the Kappa number range 1 to 100. For pulps with a Kappa number exceeding 100, use the chlorine-consumption procedure (ISO 3260) to describe the degree of delignification. To achieve the greatest precision and accuracy, the sample size has to be adjusted so that the consumption of permanganate falls between 20 % and 60 % of the amount added. NOTE There is no general and unambiguous relationship between the Kappa number and the lignin content of pulp. The relationship varies according to the wood species and delignification procedure. All compounds oxidized by KMnO4, not only lignin, will increase the consumption of KMnO4, and thereby increase the Kappa number.[8] If the Kappa number is to be used to derive an index of pulp lignin content, specific relationships will have to be developed for each pulp type.