1. Wash with gasoline or alcohol (not white wine). As we all know, decoration has to deal with paint every day. They usually wash their bodies with paint. Because gasoline is an organic solvent, it still plays a great role. In addition, now that every household has a car, naturally there is gasoline.
2. Use toilet water or essential oil. Every household has toilet water or essential oil in summer. It is estimated that there is an organic solvent in it, which can dissolve tannin and other substances in walnut skin. The visual effect is ok, after all, the juice of walnut skin is difficult to wash.
3. Rub the dyeing position repeatedly with salt, and then wash it with soap. Because these juices will stick to the skin surface, using salt can promote the metabolism of the skin and help to fade the color of the hands.
4. Wash with diluted strong acid. Because strong acid can bleach, it is still very effective to remove the color of the black part of the hand with dilute acid solution, but the diluted strong acid can also cause harm to the skin, so this method is generally not recommended unless it is an emergency. But it's good to use vinegar instead of strong acid.
5, grape juice cleaning. When you find black matter attached to walnuts after peeling, you can try to eat some grapes. In the meantime, the brown or even black walnut on your hand will be unconsciously cleaned by the fruit acid in the grape juice, and the lemon juice can also be washed off by the grape juice.