Solvent Extraction
In addition to distillation and expression methods, there are various extraction methods to obtain essential oils. Although extraction methods are more complicated than distillation, it is preferred for plants that are too delicate for distillation. The product obtained by solvent extraction
Mechanical Expression
Mechanical expression is used for extracting essential oils from the rinds of Citrus fruits such as lemons, bergamot, oranges and limes. Expression is generally preferred for Citrus oils since their components in aldehyde structure can be easily decomposed in heat