You can highlight three main ways of obtaining essential oils from plants, they are: distillation, extraction, and extrusion.
The simplest method is distillation, which involves passing water vapor through a huge vat filled with plants. Under the influence of high temperature water, essential oils and other substances begin to evaporate, and when the contents of the vat schłodzi water and essential oils are condensation and distribute, and then without a problem, you can collect the essential oils ready for further use.
It turns out that not all essential oils can be obtained from the distillation process, for example in the case of fragile flowers such as roses and jasmine essential oils in the process of distillation would be destroyed, because in such cases is the extraction. Using this method, the flowers are dipped in a special substance solubility oils (eg alcohol), and when the flakes zwiędną, we can address the remaining liquid to which przenikły oils. The resulting liquid is poured into a centrifuge in which the substances are splitting according to their weight.
process of obtaining essential oils extraction method is more time consuming than distillation, it might take up to 20 days, the oils obtained in this way are usually much more expensive.