Potash Alum is used for various purposes in real life:Fire Retardant: Potash Alum adds flame resistance to clothes, wood, and other materials.Gourmet Food: It has a specific acidic composition perfect for use in baking powder; bakeries in England use this Alum in their bread-making process.Dissolving Iron and Steel: It is used to dissolve Iron and Steel to create castings of various machinery.Lake Pigmentation: It acts as a base for the pigmentation of most of the lakes.