The oil press is an elegant and ingenious machine which enables enormous pressure to be applied to the olive paste. 15kg of olive mixture takes about 25 minutes to press (including filling and emptying). First the top screw is turned to apply moderate pressure, then the hydraulic jack is gently foot pumped to apply up to 10 tonnes of pressure from below. The olive paste is contained in a stainless steel cylinder with slits cut in it which sits in a pot with a pouring spout. By using a series of acrylic mats and stainless steel plates, the press achieves close to total extraction of the oil that can be extracted by cold pressing. The whole top assembly swings open for filling and emptying.