ISO 5267的这一部分规定了一种测定纸浆悬浮液在水中的排水性的方法 以毫升为单位的“加拿大标准”游离度。 原则上，该方法适用于水悬浮液中的各种纸浆。 注:产生大量细粒的处理可能会导致游离度异常升高（假游离度），如 值低于100毫升的规则。

This part of ISO 5267 specifies a method for determination of the drainability of a pulp suspension in water in terms of the "Canadian Standard" freeness in millilitres. In principle, this method is applicable to all kinds of pulp in aqueous suspension. NOTE Treatments which produce a large proportion of fines may induce an anomalous rise in freeness (false freeness), as a rule at values below 100 ml.