If you are more careful in children's shoes, you will find that,
We will be advised to use black carbon pen to answer questions on the examination paper.
What is a carbon pen?
The ink in the carbon refill is mainly composed of graphite, which is one of the stable substances in nature.
Writing with carbon pen is not easy to be altered, wet, wet, and will not be blurred or faded due to long storage time.
It means,
N years later, I can still see my own paper answers
Do you suddenly feel like studying hard,
Save "you in the future",
After reading the test paper
I want to play "who I am now"
To sum up, carbon pen has two main advantages
1. Long shelf life
The characters written with carbon pen are not easy to be altered, wet and wet. After n years, the handwriting is still clear, not easy to blur and fade.
2. Marking safety
Because when scanning and marking, the handwriting of the black carbon pen is clearer and looks more beautiful.
There are often students because of the wrong pen, resulting in the answer handwriting scan not out, so it's a pity to lose points!
And black carbon pen writing is not easy to fade, so the paper can not be modified, more suitable for the test.
SO
Don't let pen selection be a problem,
Affect your grades.