Remember, dye starts as a powder. So when you see a "solid" "cube" type dye, that is a powder that is blended with wax. So you're not getting "pure" dye. But you are getting an easy way to measure. Liquid dye (mostly) is the same story, it is a powder that is suspended in a "carrier" that is then blended. Powder dye, provided it is not cut with anything is the real-deal. Basic quality can be found @ pourette, and then the dye houses (google) can turn you on to the hard-core stuff. I can tell you that Pourette is just fine for 90% of the applications you can think of. Just remember that too much dye *can* clog a wick... so testing isn't always a bad idea with dark dark colors. Good Luck.