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Alum, also known as alum, potassium alum, potassium aluminum alum, and potassium alum, is a double salt of potassium sulfate and aluminum sulfate containing crystal water. It has antibacterial and astringent effects, and can be used as Chinese medicine. Alum can also be used to prepare aluminum salts, baking powder, paints, tanning materials, clarifying agents, mordants, papermaking, waterproofing agents, etc., and can also be used as food additives. In our lives, it is often used to purify water and to make edible expansion agents, such as fried hemp balls and fried dough sticks.

Dreaming of alum indicates that the original plan has encountered setbacks.

Tasting alum, expressing that you secretly blame yourself for the bad things you have done to innocent people.

A woman dreams of many alums, indicating disappointment in married life and lack of love.

The businessman dreamed of alum, indicating that the original plan would fail and investment would suffer.

The student dreamed of alum, indicating that there is a tendency to play games in learning, and the assignments that should be completed were not completed on time.