| Hello Pepfun1, The MP (melt and pour) base is glycerin. Glycerin is derived from soap. Soap is made from using lye(sodium hydroxide, or for soft soap, potassium hydroxide) and mixed with fats and oils. I haven't researched this part, but this is my understanding of how glycerin is obtained. The large manufactures of soap pull off the glycerin, using salt. This is your melt and pour base. Cold processed soap contains about 5 or 7% glycerin. hth |