Anyone else considering making their own homemade lye soap should probably follow the advice given decades ago in The Mother Earth News, and wear rubber gloves when washing their hands.
With this formula, TOL, you could have been the Bill Gates of the Roman Empire! You could have even founded a soap company called Micro Soft.
It is actually lye-and-fatty-
acid soap. If you will recall, an acid plus a base equals a salt. Yes, soap is a salt.
I have pH papers and check my soap when it's cured. The soap runs between 8-8.5, just a bit more caustic than a hard-boiled egg, which is pH 8.
I've been using my own soap for 13+ years, and these are my hands when I was 65:
Yes, that is a PS90, and that is the stamp on my hand from the gun show where Bryan and I bought it that day.