Cutometer loading and unloading curve. Typical deformation curve of skin under one cycle of loading and unloading. The Cutometer measures deformation of skin in millimeters as a function of time in seconds. Here, 45 kPa of suction was applied for 2 seconds, followed by no suction for 2 seconds. Uf is labeled and represents the maximal amount of skin deformation due to the suction load.