Three methods to extract aroma oils are as follows:
a)Steam Distillation
Plant material is placed into still where pressurized steam passes through the plant material.
The heat from the steam causes globules of oil in the plant to burst and the oil then evaporates. The essential oil vapor and steam then pass out the top of the still into a water and cooled pipe where the vapors are condensed back to liquids. At this point, the essential oil separates from the water and floats to the top.
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b)Maceration
It creates more of infused oil rather than essential oil. The plant matter is soaked in vegetable oil, heated and strained at which point it can be used for massage.
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c)Cold pressing
Used to extract essential oils from citrus rinds such as orange, lemon,grapefruit and bergamot. The rinds are separated from fruit,are ground or chopped and are then pressed which produces watery mixture of essential oil.
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