In the fingertip force test, the pressure-force relationship wasrecorded in a fixed finger position, i.e., with constant α. α isdefined as the angle of joint 1, which equals to zero at theposition in Fig. 7(b)). α increases with the joint 1 rotation inclockwise. Experimental results in Fig. 7(c) present the pressureforcerelation in α = 0◦, 30◦, 60◦ respectively. Fingertip forceof 40 N in the air pressure of 60 kPa could be achieved bythe robotic glove when α = 0◦. The force capability of theglove is around five times larger than the Fluid-driven softbendingrobotic gloves [6] with much less actuation pressure.Comparing to the condition α = 0◦,fingertip force decreaseswith the increase of α. This tendency matches the prediction inSection II.