Ingredient: PEG-40 hydrogenated castor oil – my methods for testing

I finally found time to play with my PEG-40 hydrogenated castor oil over my holidays, so let’s take a look at the results of my experiments! (I’ve done this kind of testing before using caprylyl/capryl glucoside. Check out the post here!)I chose four different fragrances that I hoped would cover the kinds I might choose…