Blue-and-black ink is deep and solemn in color, difficult to fade, and fluent in writing. It is a common ink used in people's study and work. Carbon ink is the most ideal black ink. Black ink is concentrated and shiny, and it is very eye-catching when written on paper. It is used to write pen words or pen calligraphy works, and the effect is the best. Red ink is generally used to correct homework, and it is used in a small scope.
However, carbon ink does block the sharp slot, and the ink in the pen bag will be left beside it for several days, which will lead to the problem of poor water entry; Even if it is used every day, it will gradually become unfavorable after several months due to deposition. The same is true of ink sac dyeing. The solution is to open and clean it often, the frequency is about once a month, and it will be changed to once every two months when using carbon ink!
Now, people are using less pens, let alone pens. Generally, they are gel pens, ballpoint pens and the like, and even the signature is convenient. Just come and sign the pen directly. Sadly, fewer and fewer people write good handwriting, so they are busy practicing their signatures at most!