Melt and Pour Soap: An Expert Guide to Making it at Home ...
This causes a chemical reaction called saponification. The benefit of melt and pour soap is that the soap base has already gone through that process, meaning you don't have to handle lye and there's no need to cure the soap-it's ready to use as soon as it's cooled and hardened. As such, this soapmaking method is more family-friendly, as well.