- Alum potassium sulfate dodecahydrate'. in the form of potassium aluminum sulfate in a concentrated bath of hot water is routinely used by jewelers and machinists to dissolve hardened steel drill bits that form aluminum, copper, brass, gold and silver (both sterling and fine). Items made from are broken.
- As an afterthought: It has been used for centuries afterward. Take some alum powder and when the skin is wet, rub it well on a freshly shaved face. Its astringent properties will control bleeding from small shaving cuts and thus, prevent infection.
- To reduce body odour: It controls body odour. It can be applied directly on the sweaty areas of the body. Since it is water soluble, it mixes with sweat and inhibits the growth of bacteria that causes body odour. People who are suffering from foot odor problem should apply it on their feet regularly before sleeping to get relief from it
- To purify water: When a small amount of alum powder is added to water, small particles of pollutants present in the water stick together and form colloid particles. Since colloid particles are heavy, they easily settle at the bottom of the container and pure water can thus be strained. Many people living in rural areas use this method to get clean water.
- Alum is a white crystalline. Alum is also used as a very reliable and reliable disinfectant and hence is also used for water treatment to make it safe to drink and use for other purposes.
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