Single pressing is pressing on single-acting presses, culminating in the production of cake, further extraction of oil from which is impossible or impractical under these technological conditions.

Double pressing is the extraction of oil by pre-pressing-pre-pressing followed by final pressing - expelling, in order to maximize oil extraction. Primary pressed oil is a prepress oil, characterized by higher quality (when compared with oil after final pressing in terms of color, acid number, peroxide number, phospholipid content).