Disappearing Purple All P Disappearing purple formula has a smooth application and is great for kids. Goes on purple so it is easy to see when applying and dries clear. Safe, non-toxic and acid-free. Washes easily off of hands and out of clothes. Smooth application, great for kids. Disappearing purple formula goes on purple, so it is easy to see when applying, and dries clear. Safe, non-toxic and acid-free. Washes easily off hands and out of clothes.