I hosted a Facebook Live on my Essential Oils Facebook group a couple weeks ago about dilution rations, blending factors, and dosage recommendations and wanted to follow up by writing blog posts on the subject since it is integral to understanding how to blend essential oils, carrier oils, and other ingredients. All too often, I see people sharing recipes that call for 10 drops of each essential oil. In some cases, that is way too much and in other cases the oils are not balancing out correctly. While you may need 10 drops of Lavender, 10 drops of Rose or Helichrysum may very well be a waste of an expensive oil. Sometimes more oil is just more oil and isn't providing any additional benefits.
Let's discuss blending factors. Here is an excellent reference sheet from the Essential Family's website: www.theessentialfamily.com/wp-content/uploads/2016/09/Blending-Factors.pdf.
Blending factors are judged on a scale from 1-10 usually. One being that the oil is more potent and you need less of it aromatically and eight meaning that it is less potent and you will need more of that oil. For example, if you are blending something with Lavender (blending factor 7) you may need to use 10 drops or more and if you are blending something with Cinnamon (blending factor 1) you may only need a couple drops.
There is also a mathematical way to blend a synergy using blending factors as a basis for the blend.
I am going to use Lavender (7), Lemon(6), and Peppermint (1) for 30 drops at a 5% dilution.
Once you get familiar with blending factors you can easily estimate the number of drops per oil without doing the mathematics.
Owner, Restorative Aromatics and NAHA Certified Aromatherapist Level One. This blog focuses on aromatherapy education and other essential oil related topics.