The 3-Leaf Soy Performance Scale is how we rate the strength of our fragrance oils and essential oils. You’ll notice that many essential oils are given a 1 or 2 Leaf rating–essential oils in general do not produce the hot or cold throw that fragrance oils do. You’ll still spot some 3 Leaf EOs like Eucalyptus and Lavender (Bulgarian).
You’ll also spot some essential oils we don’t recommend using in candles at all. When some EOs are used to fragrance candles, the burning flame transforms the aroma such that it becomes unpleasant or unrecognizable. For example, Orange (Sweet) is gorgeously sweet and citrusy in soap, lotions, and wax melts, but when used in candles the aroma is more akin to a “fuel-like” or burning rubber scent.
We want you to be confident that the essential oils you’re using in your products are of the highest quality and purity. For all CandleScience Essential Oils, you’ll have access to Certificates of Analysis, Safety Data Sheets, and the IFRA certificate. You're likely already familiar with IFRA certificates and Safety Data Sheets through working with fragrance oils (and if not, you can learn more about using the IFRA certificate here). Certificates of Analysis verify if an essential oil passes or fails certain technical specifications like color, odor, and specific gravity. Find each of these documents linked right on the product pages for your easy reference.