After shave alum stone.
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.
 
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.