Wash with baking soda: The walnut cingellin stained on your hands is an acidic substance. You can put your hands in diluted baking soda and wash them repeatedly, and use acid-base neutralization and decontamination. Wash with white vinegar: Pour an appropriate amount of white vinegar on the blackened parts of your hands. Acetic acid has a certain cleaning effect, then rub it repeatedly, and then rinse it with water. Repeat it several times, and the color will slowly fade.

1. Wash with baking soda: The walnut cingellin stained on your hands is an acidic substance. You can put your hands in diluted baking soda and wash them repeatedly. Acid and alkali neutralization and decontamination. Note that the concentration of baking soda should not be too high, as it may damage the skin of your hands.

2. Wash with white vinegar: Pour an appropriate amount of white vinegar on the blackened parts of your hands. Acetic acid has a certain cleaning effect, then rub it repeatedly, and then rinse with water. Repeat several times, and the color will slowly change. light.

3. Wash with fine sand mixed with washing powder and water: Hold the sand in your hands and rub each other back and forth. Use the friction of the sand to remove the black matter. The longer you rub, the lighter the stain will be.

4. Clean with hand sanitizer: Dip your hands in water and pour an appropriate amount of hand sanitizer. Use the cleaning effect of the hand sanitizer to remove stains. Rub it repeatedly and then rinse with clean water, and cycle it several times.