What is the role of the main pressure of the tablet press

Generally speaking, there are pre-pressure and main pressure in tablet presses. The pre-pressure mainly plays the role of excluding powder and air in order to prevent cracking or chipping of tablets. After the powder is pre-pressurized, it reaches the main pressure, and the tablets after the main pressure make the tablets reach the target tablet weight and hardness. The size of the main pressure can be controlled by touch screen.