When you walk into a supper market to the edible oil section, the oils are almost vegetable oils, as a matter of fact; edible oil mainly refers to vegetable oils and animal oils. Common edible vegetable oils are: soybean oil, rapeseed oil, peanut oil, sunflower oil, cottonseed oil, palm oil, coconut oil, corn germ oil, sesame oil, rice bran oil, olive oil,and so on.
Pressing or leaching is not the standard of oil quality. Pressing process includes: crushing; softening and cooking and pressing oil directly from the oilseeds, pressing process currently mainly used to produce high-grade oil like peanut oil, olive oil, nut oil, sesame oil, etc. While chemical leaching method is to produce refined oil through full immersion of some kind of solvent with oilseeds, high-temperature extraction, degreasing, degumming, dehydration, bleaching, deodorization and deacidification.
