该方法描述了测量卫生纸和卫生纸制品的膨胀厚度和变化的程序。由于纸巾的可折叠结构，本试验方法使用的压力相对较低，为2 kPa（0.3 psi）。TAPPI T 411纸张、纸板和组合纸板的厚度（卡尺）使用相对高压50 kPa（7.3 psi）。ISO 12625-3卫生纸和卫生纸产品第3部分:厚度、膨胀厚度和表观体积密度的测定中描述了一种基本相同的方法。

This method describes the procedure for measuring bulking thickness and variations in tissue paper and tissue products.This test method uses a relatively low-pressure 2 kPa (0.3 psi) because of the collapsible structure of tissue paper. TAPPI T 411 Thickness (caliper) of paper, paperboard, and combined board uses a relatively high-pressure 50 kPa (7.3 psi).An essentially identical method is described in ISO 12625-3 Tissue paper and tissue products -- Part 3: Determination of thickness, bulking thickness and apparent bulk density.