To treat purple potion stains, dilute a small amount of insurance powder with boiling water, and wipe it with a small brush dipped in the solution. Scrub repeatedly with insurance powder and clean water until clean (wool sticky materials, dyed clothes, silk and direct dye coloring are prohibited).
The main ingredients in purple potion are extracted from gentian grass, so purple potion is also called gentian purple. It is a commonly used external potion. It is stained on clothes and has a blue-purple color, which is very conspicuous. The removal method is: soak the clothes in water, wring them a little, and dip them in a cotton swab in a 20% aqueous oxalic acid solution to apply stains from the inside to the outside. After a moment of silence, you can rinse and rub it repeatedly with clean water, and the stains can be removed. In addition, for some white fabrics stained with purple potion, the floating color can be removed with solvent alcohol first, and then bleached with oxidizer sodium hypochlorite or hydrogen peroxide solution. After washing with water, the expected effect can be achieved.