Hardening Melt and Pour Soap
(Trinidad & Tobago)
I make only melt and pour soaps. What can I use to make the soap harder?
You can add a small amount of beeswax or stearic acid (up to 1 tbsp per pound of soap) to your melt and pour soap base but it will reduce the lathering properties of the soap.
I've heard as well that you can leave the soap out in a dry location with a fan on it for a few days before wrapping it up. This is said to help evaporate some of the excess water which will firm up the soap a little bit.