Easy to use, this alum stick is applied to wet skin, gliding over it, and depositing an invisible film that limits the development of unpleasant odors without blocking sweat. Its mineral origin gives it softening, moisturizing, and astringent properties. The properties of potassium alum have been known for several millennia before Christ; it is even mentioned in an Egyptian papyrus. It has been used since ancient Greek and Roman times as a cosmetic product and in the dyeing industry, where it was used to fix colors. Other uses of potassium alum stone have since complemented these, such as water treatment with flocculation, detergents, mouthwashes, and modeling paste.
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