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What Are Essential Oils?
Essential oils are highly concentrated, volatile oils that are extracted from aromatic plants. Essential have been used by many cultures around the world for centuries. Essential oils have been used for cosmetic purposes and for their spiritually and emotionally uplifting qualities.
About 700 different kinds of plants contain useful essential oils, and there are several methods employed to extract them, the most common of which are water and steam distillation. We'll focus on water distillation here.
Essential oils can be costly to buy but they are relatively inexpensive to distill at home. Some botanicals store their essential oil within their leaves or flowers while others may store the oil within their rinds, seeds or other plant parts.
How To Make Essential Oils
- Harvest the raw plant material
- Dry the plant material
- Add water to the still
- Add your plant material to the still
- Heat the still
- Filter the collected oil
- Pour the oil into a container for storage
- Clean the still
1. Harvest Plant Material
The quantity of essential oils contained in a plant varies over the course of the plant's development, so it is essential to harvest at the right time. This will depend on the type of plant, so you need to do some research to determine when to harvest. It is also critical to harvest the plants correctly. Careless handling, harvesting the wrong parts, even harvesting at the wrong time of day can reduce the quantity and quality of the essential oils. Always research the plant you wish to make essential oils from.
2. Dry the Plan Material
Drying reduces the amount of oil in each plant, but can greatly increase your yield per batch because you will be able to fit more material into each batch. Drying should be done slowly and NOT in direct sunlight.
3. Prepare The Still
Clean the still before use if you haven't already done so (see step number 8 for more info). Next, fill the still with distilled water. Make sure you have enough water in the still to complete the distillation. Depending on the plant and on the quantity, distillation can take anywhere from a half-hour to six hours or more after the water boils.
4. Add Plan Material To The Still
Do not chop or cut the plant material as doing so will cause you to lose some of the oils from the plant material. Add the plant material to a meshbag and tie the bag with the plant material so it is fully submerged in the water but is not touching the bottom of the still. Most stills are direct fired and you don't want plant material scorching to the bottom of the still. It is perfectly fine to have a thick layer of plant material in the bag as long as it is fully submerged in the still.
5. Heat The Still
Turn the heat to high and boil the water in the still. Most plants will release their essential oils at 212 degrees Fahrenheit (the boiling point of water at sea level- adjust for altitude). As the still is heating up turn on the water for the condenser. It is recommended to turn the condensing water on at 150 Fahrenheit. Once the water is boiling and the condensing water is flowing the essential oils should begin to come through the drip-arm and into your collection jar. The distillation process is pretty hands-off, but you will want to make sure that you do not run out of water in your still as this will damage the distillation equipment.
6. Filter The Essential Oils
Once your distillation is complete you may filter the oil through cheesecloth. Make sure that the cloth is dry and clean. Detergent residues as well as dirt can contaminate the oil.
7. Store the oil
Once the oil has been harvested, store the oil in an airtight glass container, leaving as little headroom as possible. If you harvested a bit of oil, a medicine dropper will do. For larger amounts, small mason jars might be appropriate.
8. Clean the still.
Once you're done distilling, rinse the still thoroughly and wipe out any residue. Next, use a food grade, professional cleanser to rid the still of any additional trace of the oil that was just distilled. We recommend Professional Brewers Wash or PBW. It's food grade and works great on copper and stainless steel. We actually contacted 5 Star Chemical, makers of PBW and asked them about using their cleanser for this application. They approved and suggested that the cleanser be diluted to about 50% - 75% of the normal strength, as the copper won't need a normal strength dose.