The method to remove the traces of carbon pen on paper is as follows:
1. Dissolve bleaching powder and baking soda in water in the same proportion, then put the paper in and soak it for 5 minutes Take it out left and right. (Dry the wet paper slightly, then put it in the refrigerator. After freezing for more than ten hours, it will be as flat as new without any wrinkles).
2. Place a piece of absorbent paper under the paper, soak the stain with 20% hydrogen peroxide solution, then place another piece of absorbent paper on the paper, put a heavy object on top, and use hydrogen peroxide to remove the ink mark. absorb.
3. On colored objects, use alcohol (you can also use high-strength liquor without alcohol) and toothpaste to apply on the ink, and then rub it vigorously, it can be washed off without fading.
4. If it is on a white or light-colored object, and the color of the carbon pen is not very dark, it is recommended to soak the object, sprinkle some salt on the dyed area, and leave it for 30 minutes. Just wash off the salt.
Knowledge about carbon pens:
For carbon pens, the ink in the pen core is mainly composed of graphite, which is one of the most stable substances in nature. Its biggest feature is that when writing with a carbon pen, the font will not become blurred due to being stored for too long.
The carbon pen consists of three production methods: the pen barrel and the pen cover are made of plastic injection molding, stainless steel stamping and grinding, and stainless steel manufacturing; the pen tip is divided into two types: cannonball type and needle tube type.
They are made of copper alloy, stainless steel or engineering plastics respectively; the balls are mostly made of stainless steel, carbide or alumina and other materials. The diameter of the ball for medium writing is 0.7mm, and the diameter of the ball for fine writing is 0.7mm. The diameter of the ultra-fine writing ball is only 0.35mm.
Reference for the above content: Baidu Encyclopedia--Carbon Pen