I never suggest adding TD directly to oils or water or lye. I always suggest pre-mixing it before use and even straining it when you pour it into your batter or oils when coloring with it. I always pre-mixed in a jar with a blender I had dedicated for my TD and also strained it when using it just as a precaution. I finally gave up on TD after using it for a few years, it was just too pesky to dissolve even using water TD. No matter how well you mix TD some will always settle to the bottom. After mixing a jar of it I would sometimes I would strain it into a squit bottle in which I had stainless steel bearings in the bottom to help when I would shake it up. As I said, after a few years I finally gave up using TD it was more trouble than it was worth for me, with my light recipes and I embraced the brown with my discoloring FO's.