Ballpoint pen oil consists of dyes, film forming agents, solvents, dispersants and other additives. Among them, the fuel is oil soluble, so a small amount of alcohol can be added to help it dissolve, while NACL in light salt water can dissolve the solvent, so it can be wiped gently after being coated with light salt water. Note that only a small amount of alcohol is needed, and do not smear it on the bank card in a large area to prevent chip corrosion.

If the area is not large, you can put a wall chart in this position to cover it, or a photo or something like that; If the area is large, you can decorate it with a brush and draw some regular small pictures such as beautiful flowers, which can make people feel refreshed.

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Other effective cleaning methods:

1, there is a kind of faded water on the market, which can react with the ink of ballpoint pen and volatilize the color of the ink.

2. Find transparent glue and stick the words on the paper together, but pay attention to speed.

3, with a matte rubber brush, the principle is also to erase the top surface and words on the card, and there is a special eraser to erase. Stationery stores have them.

4. Rub gently with some toothpaste and a little soap. If there are traces, wipe them off with alcohol.