1. First pour alcohol on the scratches of the fountain pen on the clothes, and evenly cover each scratch with alcohol. Alcohol should be medical alcohol with a concentration of not less than 75%.

2. Put the clothes poured with alcohol face up, and try not to touch the other sides of the clothes, otherwise the marking color of the pen may be dyed to other parts of the clothes.

3. Prepare more than half a basin of water with an ordinary washbasin, and then pour two bottles of bleach into clear water. Be sure to fill two bottles before mixing.

4, a little washing powder, this amount can be mastered by yourself. After that, stir it a little to make the washing powder completely soluble in water. Soak 15 minutes to remove oil stains.