Description
The alum or potassium alum is a mixture of aluminum and potassium salt of sulfuric acid which at room temperature is presented as a colorless solid,odorless and totally natural. It is a perfect ally for after shaving thanks to the astringent and hemostatic capabilities. This natural mineral is also used as a natural hypoallergenic.
Potassium alum,mineral present in nature with an astringent action
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