I make my own glycerin soap, so I can’t speak to the quality of what you might be using. There’s a huge variation in the market as to quality. Most of them that aren’t made by organic manufacturers are just detergent that you can melt and pour. It’s pretty awful stuff, both for the skin and for the handmade market. There are some good vendors out there, and were I you, I’d avoid the stuff at craft stores, and go with a vendor that sells to the trade. Brambleberry has a fantastic product, and sells in small amounts. (I sell glycerin, but only in massive blocks.) Keep in mind that glycerin is a humectant. A humectant is a hygroscopic substance. It is a molecule with several hydrophilic groups which absorb water from the air. On humid days, glycerin will sweat, it’s just what it does.

As to color, for a small batch, I wouldn’t invest in expensive professional colorants. Food coloring will work fine in glycerin. You just want a couple of drops per bar. Don’t use too much, or you’ll turn your clients a different color. It seems to upset some people when they turn green or purple. Some people…what can you do?

Good luck! Ping me if you run into trouble!

Drop me a line at deanne at soapyhollow.com and we can chat a little about what you’d like to have made.