What kind of natural colours can I use?
Outside of the oxides and ultra marines, there are few colours that will hold for any length of time. Ultraviolet light (UVA and UVB) are hard on most coloured items. Natural colours like that found in food stores are of little use. If you use pigments or Food, Drug and Cosmetic (FD&C) grade colourants, shelf life can be 10 times longer, but eventually any clear packaged product will gradually fade. Pick natural rather than clear bottles. Wrap your soap and try to avoid direct sunlight, as colour matching will be impossible next time.
