In a manual heat press, the user’s force is needed. The heat press must be closed and also opened by hand. In semi-automatic heat press, the machine is closed by hand as in manual heat press. After the time has elapsed, however, it then opens automatically. With pneumatic heat press, no force is required by the operator. The printing process is usually started conveniently via a 2-hand safety control. All pneumatic machines open automatically after the time has elapsed. However, a compressor is required to generate compressed air.