WATER BASED FRAGRANCE SPRAY
distilled water to 100%
1% to 3% fragrance or essential oil
1% to 10% caprylyl/capryl glucoside
preservative to suggested usage rate (I use 0.5% liquid Germall Plus)
This spray contains 1% Yuzu fragrance oil and 2% caprylyl/capryl glucoside with 0.5% liquid Germall Plus, and 96.5% distilled water. It's lovely and clear and doesn't need shaking before we use it. This is the test of whether or not you've managed to solubilize your fragrance oil in the water. If it doesn't need shaking, then you've managed to disperse the oil properly. You will have to play around with every single fragrance or essential oil you wish to use to see if it will remain dispersed in the water.
Having said this, it's amazing how much we want to shake bottles, even when we're told not to do so, like on my sinus allergy spray! Odds are pretty good that you will be able to get away with using no more than 1:1 or 2:1 ratios because you will end up shaking the spray anyway. Just make sure you're using a opaque bottle so you can't see the separation!
The clarity of your product will depend upon a number of things, including the original colour of the fragrance oil. If you're using an orange tinged fragrance oil, you could have a slightly orange tinge to the product. If you're using something like vanilla, odds are good that you'll end up with a cloudy product. The Yuzu fragrance I used above is very very clear with no yellow or orange tinge, hence the clear product.
In the picture above, I'm testing to see how much solubilizer I will need for my favourite fragrance oil, Clementine Cupcake (from Brambleberry! Awesome!). For each test tube I mixed 1 gram of fragrance oil with 1, 2, 3, or 4 grams of solubilizer, then added 20 grams of water. For each one, I mixed them together after adding the solubilizer, then after I added the water, then after I poured them into the test tube. As you can see, the first three test tubes separated almost immediately. But 20 minutes later, 4 was still cloudy, indicating that the oil was remaining solubilized. Two hours later, still solubilized. 24 hours later...nope.
Why did it work so well with the Yuzu and not with the Clementine Cupcake? I don't know. I have a theory that the vanilla in the latter might have something to do with it, but I have absolutely no proof of this other than my hunch.
Join me tomorrow for more fun formulating with caprylyl/capryl glucoside!