At Burst of Happyness, we make soap using the cold-process technique, which means that no external heat is applied during the saponification (soap-making) process. This essentially is a chemical reaction between a fatty acid (oils) with a base (lye). When done correctly, this results in a nice, hard bar with lots of glycerine.
Simply put: Oils + Lye = Soap with glycerine
The final soap bar contains no lye as it gets completely consumed in the saponification process, which takes 48 hours to complete. As a matter of fact, it isn’t possible to make any soap (be it handmade or commercial) without lye, and if someone tells you otherwise, they are either misinformed or not admitting the truth