How do you re rock alum?

Re-rocking alum involves crushing the alum crystals into a fine powder and then mixing it with a binding agent, often using water, to reform it into solid blocks. The mixture is then pressed into molds and allowed to dry completely before being used again. This process helps restore the alum's usability for various applications, such as in water purification or as an astringent. Always ensure safety measures are followed, as handling chemicals can pose risks.