Generally, ink stains can be scrubbed with gasoline and then cleaned with detergent. Or soak the contaminated fabric in carbon tetrachloride, rub it, and then rinse it with clean water. If it cannot be washed with clean water, wipe it with 10% ammonia or 10% baking soda solution, and finally wash it off with water.

If it is a ballpoint pen mark:

1. Soak the stained area in warm water (40°C) and scrub with benzene or use a cotton ball dipped in benzene, then wash with detergent and clean water (warm water) Rinse.

2. Soak the stained area with cold water, wipe gently with carbon tetrachloride or acetone, then wash with detergent and rinse with warm water.

3. When the stain is deep, you can wipe it with gasoline first, and then rub it with 95% alcohol. If there are still traces, you need to clean it with bleaching powder. Finally, rub it gently with toothpaste and soap, and then rinse with water. But it is strictly forbidden to soak in boiling water.