I love LabColors, but I've come to realize that depending on who you get it from, sometimes they're pre-mixed in glycerin and it takes SOOOO many drops to get the color I want. Ex. Brambleberry labcolors, I use 5 drops.. Chemistry Store labcolors, I use 50! Literally, 50 drops for 4 lbs yesterday!
I only know of Brambleberry that sells concentrates.