Fig. 2.

Wiping pressure between dry and wet. (A) Experimental design of wiping between dry and wet using a pressure sensor. The pressure was evaluated independently six times. (B) The representative peak contact load distribution of each sensor cell recorded by an indenter moving in one direction. (C) Wiping contact load per sensor. P value was calculated using Mann–Whitney test. (D) The representative pressure of a section between dry and wet. (E) Contact area for the wiping to pressure sensor. (F) The representative quantified pressure of a section. (G) Average of maximum contact pressure per cell of the sensor. Data are presented as mean ± SD. ∗P < 0.05, and ∗∗P < 0.01. Data are presented as mean ± SD. P values were calculated using Mann–Whitney test.