I finally got my hands on some TEC with the intention of using it to extend the "freshness" of fragrance oils in my formulations (which is my interpretation of what people mean when they say it's a fixative). But I have no idea how or how much to use...what is typical? Do you mix it with the the fragrance oils like you would a solubilizer and then add them to the emulsion? Or do you just put it in by itself? And how much do you normally use?
Any general guidelines or info about this mysterious (to me) substance would be appreciated. I don't even know the basics about it, like is it oil-soluble?