Extraction Methods of Ingredients May Include these processes:
In the making of essential oils using water distillation, the plant material is completely immersed in water and is brought to the boil. This method protects the oils so extracted to a certain degree since the surrounding water acts as a barrier to prevent it from overheating. The plant material comes into direct contact with the water. This method is most often employed with flowers, as direct steam causes these flowers to clump together making it difficult for steam to pass through.
This is the most common, gentle and productive method of essential oil extraction. The plants are not directly submerged in boiling water because at high temperatures the most subtle aromas might be altered. During this process, steam is injected into the still, usually at slightly higher pressures and temperatures than the above method.
Expeller Cold Pressed
Expeller pressing is a chemical-free mechanical process that extracts oil from seeds and nuts. An expeller press is a screw type machine, which presses oil seeds. This machine uses friction and continuous pressure to compress the seed material. Although pressing and grinding produces heat through friction, the temperature must not rise above 120°F for any oil to be considered cold pressed. Cold pressed oils are produced at even lower temperatures. Cold pressed oils retain all of their nutritional value. The oil seeps through small openings that do not allow seed fiber solids to pass through.