How to make olive oil

How do people make olive oil? There are two ways to make it, the traditional way and the modern way. Do you use olive oil?

The process starts with the picking of the fruit. Traditional harvesting methods are with a small rake kind of thing, but with larger farms they use machines that shake the olives off the trees.

After they have picked the fruit they ship them (or just drive them) to the factory. Once they get there they are washed. First they are just rinsed, but to get rid of the stubborn sticks they are put though a grid that they get stuck in.

Once they are washed they are sent to the grinder. Traditionally there is a period were the fruit sits around before grinding, but this affects the quality of the oil. In the old method you also use marble grinders to mush the olives and the pips all into a pulp. The more modern way fixes two of these problems. In the factory the fruit is sent to the grinder strate away and the olives are grinded slowly. This helps keep the temperature of the pulp down, if the pulp gets to be over 27℃ it will effect the quality of the oil. 

Next the people press the oil out of the olives. The traditional way to get the oil out is to layer the mush between big sheets of rubber. Then it is put on a hydraulic press and they squeeze the oil out. The more modern but less effective way is to put the pulp in a centrifuge To get the water out of it. Water and oil have different densities so they will be separated in the machine as it spins. They then siphon out the oil. 

Finally the oil is bottled in its dark green bottles and labeled. There is a good reason for this as well as the bottle is like a kind of sun screen stopping the sun from getting to the oil. Then you buy it from the shops and use it for cooking and eating.