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Which citrus fruits are processed by pressing their peels for essential oil?

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The chemistry behind craft beer — Essential oil Discover the chemistry of brewing different types and colours of beer.

The process of obtaining essential oils from citrus fruits is known as expression. In this method, the outer colored peels are squeezed in presses, and the resulting oil is then decanted or centrifuged to remove water and debris.1

This technique is used to produce essential oils from the following citrus fruits:

Sweet orange
Bitter orange
Lemon
Lime
Mandarin
Tangerine
Bergamot
Grapefruit

Much of the oil produced through this process serves as a by-product of the concentrated-citrus-juice industry.1