Preparation materials: 84 disinfectant, rag

1. First, pour an appropriate amount of 84 disinfectant on the rag. Be careful not to dilute the 84 disinfectant here. Pour it directly on the rag. That's it. As shown in the picture

2. Then use the rag to wipe the areas with ballpoint pen marks on the wallpaper back and forth. As shown in the picture

3. Finally, wipe all areas with ballpoint pen marks on the wallpaper with 84 disinfectant. After drying, the wallpaper will be wiped clean. As shown in the picture

Extended information:

Common knowledge about the use of ballpoint pens

1. This pen is stronger and more durable than ordinary fountain pens, but if used and stored improperly, writing often The inability to produce words is mainly due to the fact that the dry ink adheres around the steel ball and blocks the ink from flowing out. Ink is a viscous oil, which is prepared by adding linseed oil, synthetic pine nut oil (mainly containing terpene alcohols), mineral oil (an oil obtained by fractionating minerals such as petroleum), hard glue and oil smoke. of.

2. When using a ballpoint pen, do not write on paper with oil or wax. Otherwise, the oil and wax will embed in the copper bowl along the edge of the steel ball, affecting the ink flow and making it impossible to write. Also avoid If the pen is hit or exposed to the sun, keep the pen cap on when not in use to prevent damage to the pen tip, deformation of the pen barrel, and oil leakage from the pen core, which may cause contamination. In case of cold weather or if it has been left unused for a long time. When the pen does not produce oil, you can soak the pen tip in warm water for a while and then stroke the pen tip on the paper to write.

3. The ballpoint pen has a big shortcoming: the handwriting it writes is very clear at first; but it cannot withstand the test of time. Over time, the handwriting will slowly become blurred. This is because ballpoint pen ink is made from dyes and castor oil.

4. Oil is different from water. It is not easy to dry. Over time, the oil will slowly soak into the paper and the writing will become blurred. Therefore, the ballpoint pen can only be used as an ordinary writing pen. If you want to preserve your handwriting for a long time, you need to use a pen. ?

5. If the ballpoint pen falls to the ground, if the pen tip hits the ground at 90 degrees, the ballpoint pen tip will not be damaged. However, if the closing area is damaged, "oil leakage" will occur at the gap. In severe cases, , the balls will fall off, and writing difficulties will occur.

Baidu Encyclopedia-Ballpoint Pen