How to remove the black spot caused by pencil puncture

Pencil is a common tool pen and is more commonly used by students. Some students like to sharpen their pencils. If you are not careful, the pencil may pierce the skin. Don't worry too much about it, because the pencil mainly contains graphite, which will not affect your health. You can wipe it with an alcohol swab. Of course, if it has entered the deep layer of the skin, it is best to go to the hospital for treatment in time.

How to remove the black spot caused by pencil puncture

1. If you get pricked by a pencil on your hands or feet, as long as it is not very deep, don't worry too much. The wounds on your hands and feet have strong recovery abilities. You can use some alcohol or a cotton swab to rub it, and the black spot will fade, and it will gradually become less obvious.

2. If a pencil pricks your skin, you can also use some alcohol or a cotton swab to rub it, which can lighten the wound a little. It may gradually become less obvious in the future. Even if a black spot is left, you can consider getting a tattoo on it to cover it perfectly.

3. If your face is pricked by a pencil, please be careful. The skin on your face is very sensitive and it is the first impression of your appearance. It would be bad if it leaves scars. If the wound is deep, go to the hospital immediately. Even if it is shallow, you can go for consultation. Please follow the doctor's instructions on disinfection and bandaging. Also, be careful about what you eat and do not eat spicy foods such as ginger, chili, soy sauce, etc. For fear of leaving scars, it is recommended to eat more foods rich in collagen.

Main ingredients of pencil lead

The main components of pencil lead are graphite and clay. According to national standards, pencils are divided into 18 types according to the graphite concentration. In the current standardized tests in my country, computers can only read pencil handwriting with a lead concentration of 2B. Too thick or too thin will cause computer reading failure or error.

Early pencils contained lead, but the main components of the pencil refills people use are graphite and binders, which no longer contain lead and are harmless to the human body.

Since the main component of pencils is graphite, and graphite is a conductor, pencil leads can conduct electricity. However, pencil leads are not very conductive. Because of the atomic structure arrangement of graphite, it can only conduct electricity in two dimensions, that is, it is conductive between two points on the same plane, but not between the upper and lower surfaces of the plane. The graphite in pencil leads is ground up and mixed with clay, so its atomic structure is disrupted and its conductivity is not very good. In the experiment, if the length of the 2B pencil lead connected exceeds 15CM, the small bulb will not light up. (voltage about 5V)