Cold Process Soap: An Expert Guide to Making it at Home ...
It's a time-tested technique: The art of soap-making can be traced as far back as ancient Babylon when archaeologists, during an excavation, first discovered a soap material inside clay cylinders dating as early as 2800 B.C. Inscriptions on the cylinders described a process of fats boiled with ashes, the world's first soap-making method. But ...
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