ABSTRACT
Fig. 24 shows the principle of the method in a similar manner, for a plate used as the test solid. As shown in Fig. 24a, the test plate S1 is fixed onto the inclined surface of support S2 and is drawn up from the liquid bath. The two-dimensional meniscus formed under S1 gradually approaches the support wall as the test plate is raised. The waist of the meniscus curve contacts the wall at a critical height and the meniscus breaks off from the solid surface. In a similar manner to that for the horizontal cylinder, we could calculate the receding contact angle from the measured critical height. Fig. 24b shows the measurement of the advancing contact angle. In this case, the plate and support are reversed, as shown in the figure. The three-phase contact line advances
