Test soap for Blacksmith brother. One of three soaps to try. This one had Borax; another had pumice only; the third had both Borax and pumice.
Soap I made for my brother, the blacksmith. The recipe was designed for him, based on his feedback from different formulas I tested. It is the combination of finely ground pumice plus Borax that makes this soap his favorite for cleaning blacksmithing stains. DB is the fragrance.