Candle Science liquid dyes are highly concentrated which means a little goes a lonnnnnng way. I used one drop in 16oz of 444 soy and achieved the lighter shade. Oh and try not to get it on your hands or anything else. It can be a bit messy to clean. If you use a damp cloth to wipe it off, it smears. Heaven help the one who spills a bottle on their countertops or floor.
As some have stated in other reviews, this stuff stinks out out of the bottle. But hey, who really smells dye expecting it to be fragrant? The bottom line is that a drop or 3 will be virtually undetectable in scented candles, unless you have the nose of a bomb sniffing K9. I say you get a pretty decent bang for your buck. I prefer this liquid to dye chips or blocks. Four stars because I haven’t tested the strength of the deeper tone and had issues getting the desired color when mixing.