First off, these dyes are amazing! I use Paraffin Wax so a little goes a long way! Literally only a couple drops for a deep color! I will say that the black dye does stick very bad BUT in my finished product all you can smell is the wonderful fragrance! I only purchase from Candle Science and can’t wait to see what other Fragrance Oils they come up with! The more, the better! Too bad I can’t add a picture of my lovely candles!