top-3-products.info ← ← ← LEARN THE BEST WAY TO MAKE SPA PRODUCTS To make sure that the saponification process is completely complete. This generally takes about 24-48 hours. Yes...I know it sounds like blasphemy...but your soap really IS safe to use after a couple of days. Now...before you all yell at me...it does become milder as it ages and cures more...but only a TINY TINY bit. 99% of the ph changes happen in the first 48 hours.