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
Wet the skin with cold water and gently rub the alum stone onto the shaved area.
Leave on for a few seconds and splash face with warm water.
For best maintenance of the stone,pat dry after use.