Hi DeAnna,I don't recall soap made with lye at 40% or higher concentration being zappy after a reasonable amount of time (18-24 hr). "Time to trace" and "time to zap free" are two different things in my thinking.
I was wondering about that actually. My first soaps were made with lye at 40% concentration, and after a week they still gave a tingly feel when I tried them under water. This tingly feeling did not last after a full 3/4 weeks' cure. Would that be considered a "time to zap free" ? (basic recipe with OO, Coconut, shea, castor ran through soap calc). Is some of the NaOh still "digested" during the cure ?