I assume that you can use a standard FO and use alot and have seepage or you can use a premium Fo without the inert stretch material in it and have no bleeding. I know, wording is rough but you know what I am saying. As you know, wax, has the the abailty to hold a certain amount of inert ingredients, after that, it will bleed. Might be why most premium candles are white? Do you want 6 drops of color or 6 more drops of fragrance for example?