Description
Alum in the form of potassium aluminum sulphate in a concentrated bath of hot water is regularly used by jewelers and machinists to dissolve hardened steel drill bits that have broken off in items made of aluminum, copper, brass, gold and silver (both sterling and fine)
Uses of alum :for treating canker sores: powdered alum can be used for treating canker sores. Simply, take a pinch of the powder and apply it on the affected area. It will bring down the pain and heal up the sores quite fast
