瓦楞介质的吸水率是通过将试样制成船形，将其漂浮在水容器的表面上，并确定可见表面达到饱和的时间来测量的。 该方法适用于瓦楞介质，因为它是通过所有工艺进行商业生产的。它通常适用于未施胶的（水叶）纸板。尚未对其适用于更大尺寸的纸板或不同克数（基重）生产的等级进行调查，而非通常用于瓦楞介质的等级。 TAPPI T 831“瓦楞介质的吸水率:水滴渗透试验”和TAPPI T 835“瓦楞介质的吸水率:水滴吸收试验”中也描述了两种可在相同的一般时间段内以相同重复性进行的优选方法它们不会给出相同的数值结果，但通常情况下，它们会按照与此方法相同的顺序对材料进行排序。 另一种首选方法是TAPPI T 832《瓦楞介质的吸水率:浮卷法》 TAPPI T 432“吸水纸的吸水性”和TAPPI T 492“纸板的吸水性（非吸水性）”已被用于测量瓦楞介质的吸水性，但导致该方法发展的研究表明，它们缺乏该方法的重复性，并且肯定需要更多的时间来进行，尤其是在更耐腐蚀的样品上。

The water absorptivity of corrugating medium is measured by forming a specimen into a boat shape, floating this on the surface of a vessel of water, and determining the time for the visible surface to become saturated. This method is applicable to corrugating medium as it is commercially produced by all processes. It is generally applicable to elatively unsized (water leaf) paperboards. It has not been investigated for applicability to more highly sized boards or to grades produced in different grammage (basis weight) than those normally used in corrugating medium. Two preferred methods which can be performed in the same general time period with equal repeatability are also described in TAPPI T 831 “Water Absorption of Corrugating Medium: Water Drop Penetration Test” and TAPPI T 835 “Water Absorption of Corrugating Medium: Water Drop Absorption Test.” They do not give the same numerical results, but, in general, will rank the materials in the same order as this method. Another preferred method is TAPPI T 832 “Water Absorption of Corrugating Medium: Float Curl Method.” TAPPI T 432 “Water Absorbency of Bibulous Paper” and TAPPI T 492 “Water Absorption of Paperboard (Nonbibulous)” have been used to measure the water absorptivity of corrugating medium, but the study which led up to the development of this method indicates that they lack the repeatability of this method and most certainly take more time to conduct, especially on the more resistant samples.