Are you interested in do-it-yourself aromatherapy? Making essential oils in the privacy of your own home can save money and trips to the health food store if you're willing to experiment with just a few simple utensils and some live plants and flowers.
Here are two ways to prepare an aromatherapy infusion that can provide you with delightful fragrances, relaxing massage oils and even base oils for your bath and skin care.
And the ingredients couldn't be simpler: all you need is:
A cooking pan - a medium saucepan will do until you decide just how large an infusion you want to make.
Local herbs and flowers which you picked or purchased.
A bottle of pure vegetable oil; a light oil like canola or safflower will do, and
A strainer from your kitchen drawer, and that's it.
This type of preparation is called an "infusion" because you are infusing the scent of the flowers and herbs directly into the oil. Here's what to do:
How to make an aromatherapy infusion
Fill pot with flowers and/or herbs.
Pour enough oil into the pot so that it fills halfway. Press the flowers and herbs into the oil so that all are wet.
Bring the mixture to 150 degrees Fahrenheit using medium heat. Do not boil! This temperature is hot enough to force the cells of the plants to burst and infuse their essence into the oil.
Remove pot from stove and strain all oil in strainer.
Discard flowers, allow oil to cool and voila! You have an aromatic aromatherapy blend ready for use. Keep tightly sealed in a bottle and store in a cool dark place.
How to make an aromatic potpourri
You can also create a nice aromatherapy potpourri by filling a jar with flowers and/or herbs and then adding oil so that all flowers are soaked in it. Close the jar tightly and let it sit in direct sunlight for about three weeks.
When the three weeks are up, remove the jar during nighttime when it is cool. Strain the oil, discard the flowers, and there you have either a lovely aromatherapy oil, a massage oil, or a carrier oil you can use to dilute other essential oils.
Do-it-yourself aromatherapy can become a special hobby that rewards you many times over with your own special oils, bath scrubs, body lotions and natural remedies. Try using different plants, herbs, flowers, oils, and simmering time. Have fun!
Aromatherapy article: the processing involved in making essential oils
For those more interested in the high-tech processing end of aromatherapy, here is a fascinating article about processing and making essential oils.
Making Essential Oils - Steam Distillation, Absolutes, And CO2's Explained
Making Essential Oils - Steam Distillation, Absolutes, And CO2's Explained by Misty Rae Cech
Aromatherapy Goes 'High Tech'
New methods of essential oil extraction are entering the mainstream of aromatherapy, offering new choices in oils never before available. With the new labels of 'CO2' and 'SCO2', along with the traditional 'steam' and 'hydro' distillations, 'absolutes', and 'cold pressing', a little education for the aromatherapy enthusiast can go a long way in essential oil selection. Is one process better than another? Does one produce a nicer smelling oil, or one with greater aromatherapeutic value? It turns out that making essential oils, like winemaking, is an art form as well as a science. The value of the newer processing methods depends greatly on the experience of the distiller, as well as the intended application of the final product. Each method is important, and has its place in making essential oils which are aromatherapy grade.
Steam and Hydro Distillation
Steam distillation, the most common method of essential oil production, involves the flow of steam into a chamber holding the raw plant material. The steam causes small sacs containing essential oil to burst. The oil is then carried by the steam out of the chamber and into a chilled condenser, where the steam once again becomes water. (Hydro-distillation is a similar process where the plant material is boiled, with the resultant steam being captured and condensed). The oil and water are then separated; the water, referred to as a 'hydrosol', can be retained as it will have some of the plant essence. Rose hydrosol, for example, is commonly used for it's mild antiseptic and soothing properties, as well as its pleasing floral aroma.
A number of factors determine the final quality of a steam distilled essential oil. Aside from the plant material itself, most important are time, temperature and pressure, and the quality of the distillation equipment. Essential oils are very complex products; each is made up of many, sometimes hundreds, of distinct molecules which come together to form the oil's aroma and therapeutic properties. Some of these molecules are fairly delicate structures which can be altered or destroyed by adverse environmental conditions. So, much like a fine meal is more flavorful when made with patience, most oils benefit from a long, slow 'cooking' process.
The temperature of the extraction chamber cannot be too high, lest some components of the oil be altered or destroyed. The same is true of the chamber's pressure. Lavender essential oil, for example, should not be processed at over 245 degrees F and three pounds per square inch of pressure (3 psi). Higher temperatures and/or pressures result in a 'harsh' aroma – more chemical than floral – and lessen the oil's therapeutic effects. Also, the extraction period must be allowed to continue for a certain period of time in order to flush ALL the oil's components from the plant, as some are released more quickly than others.
Despite the drawbacks of aggressive processing, high temperatures and pressures are often used to produces large quantities of oil in a short period of time. These oils are usually destined for use in cosmetic and processed food manufacturing, but are sometimes sold to final consumers as essential oils for use in aromatherapy. These oils will be less expensive, but are of limited therapeutic value, and the difference is apparent when the aromas are compared side-by-side.
Some plants, and particularly flowers, do not lend themselves to steam distilling. They are too delicate, or their fragrance and therapeutic essences cannot be completely released by water alone. These oils will be produced as 'absolutes' – and while not technically considered essential oils they can still be of therapeutic value. Jasmine oil and Rose oil in particular are delicate flowers whose oils are often found in 'absolute' form.
The processing of an absolute first involves the hydrocarbon solvent extraction of a 'concrete' from the plant material, a semi-solid mixture of typically 50% wax and 50% volatile oil. The concrete is again processed using ethyl alcohol (the same alcohol found in beer, wine, etc.) in which the wax is only slightly soluble. The volatile plant oil separates into the alcohol and this mixture is removed. The alcohol is then evaporated and the result is an almost pure plant extract – depending on the care taken in the evaporation process, sometimes 2% or less of the ethyl alcohol may remain. The use of solvents in the extraction process notwithstanding, absolutes can have incredibly deep and complex aromas.
CO2's and SCO2's
And now for the most modern technologies, Carbon Dioxide and Supercritical Carbon Dioxide extraction. Both methods involve the use of carbon dioxide as the 'solvent' which carries the essential oil away from the raw plant material. The lower pressure CO2 extraction involves chilling carbon dioxide to between 35 and 55 degrees F, and pumping it through the plant material at about 1000 psi. The carbon dioxide in this condition is condensed to a liquid. Supercritical CO2 extraction (SCO2) involves carbon dioxide heated to 87 degrees F and pumped through the plant material at around 8,000 psi – under these conditions, the carbon dioxide is likened to a 'dense fog' or vapor. With release of the pressure in either process, the carbon dioxide escapes in its gaseous form, leaving the essential oil behind.
These carbon dioxide methods have a couple of advantages: Like steam distillation, there are no solvent residues left behind, and the resultant product is quite pure. Like solvent extraction, there is no heat applied to the plant material or essential oil to alter it in any way. The oil produced is very accurate with respect to the original state of the plant. The CO2 methods also are the most efficient, producing the most oil per amount of plant (one of the reasons for the high cost of essential oils is the low yield of oil from most plants – one ton of Rose petals produces less than 1 pound of oil, for example). The efficiency of CO2 extraction is particularly important when rare or endangered plant species are involved, such as Indian Sandalwood oil – less of the precious plant is needed to produce an equivalent amount of oil.
Finally, there is the 'cold pressing' of citrus oils from the peels of fruit, as is done with Bergamot oil, Orange oil , Lemon oil , and the like. This method involves the simple pressing of the rind at about 120 degrees F to extract the oil. Little, if any, alteration from the oil's original state occurs – these citrus oils retain their bright, fresh, uplifting aromas like that of smelling a wonderfully ripe fruit.
Which Method is Best?
CO2's, with some obvious advantages, are not always the best choice for a particular need. They still are the most expensive, despite their higher yields. The resultant product differs slightly compared to one produced another way – the oils produced by steam distillation of some plants may sometimes be found to have a more agreeable aroma. Patchouli oil, for example, seems to benefit from the steam distillation process by becoming a little warmer and richer. Many other essential oils are quite effectively produced via steam distillation, with little alteration from the original plant state. Oils from other plant species do seem more 'complete' with CO2 processing, with Frankincense oil and most of the 'spice' oils being good examples where a little something special is present in the aroma. This likely translates to greater therapeautic properties.
Making essential oils of aromatherapeutic grade is skill requiring years of experience. It takes the work of a dedicated artesian at every step, from growing and harvesting to fine-tuning the distillation process, to produce a truly fine oil. Making essential oils relies far more on knowledge and experience than it does on the particular extraction method. There are, however, legitimate reasons to select one distillation method over another – some plants simply require a particular process to produce a fine oil, and the oil needed for a particular application may only be made by one process. In the end, as is often the case in aromatherapy, your own sense of smell can tell you which oil will work best for you.
About the Author: Misty Rae Cech, ND, is a naturopath and yoga teacher practicing in Boulder, Colorado. She enjoys pure essential oils, using aromatherapy in conjunction with other natural therapies. More can be found at the Ananda Apothecary, http://www.anandaapothecary.com