How to wash hotel sheets?

Potassium permanganate and acetic acid are prepared by dissolving a small amount of potassium permanganate in water, then putting the sheets to be rinsed in and fully soaking them. After soaking in 10 to 20 minutes, the sheets are dark red. Pick up the sheets and wash them with clean water. Then a little acetic acid is dissolved in water, and the sheets soaked with potassium permanganate are put into the acetic acid solution, so that the sheets will gradually change from dark red to the original color, and the dyed places will gradually fade away without destroying the original color of the sheets.