How to prevent carbon ink precipitation

Ink is a liquid containing pigments or dyes. Ink is used for writing or painting. When people think of ink, they usually think of pen or brush ink first, but in fact, the most used ink is printing ink. The earliest inks were dyes made of metal, walnut shells or seeds, or inks from marine animals such as squid and octopus. China's ink is made of carbon. Ink made of pigment is generally mixed with other substances to prevent the pigment from being wiped off. Such ink generally does not penetrate into paper, so the ink used in printing can reduce the printing cost. Ink made of dyes is stronger, but it is usually soluble in water. They penetrate into the paper, and may also penetrate into the back of the paper, so there are certain technical obstacles in printing. Therefore, this kind of ink generally uses a solution that dries very quickly or tries to accelerate the drying of the ink when printing. Other techniques include using harder paper or using special paper. Common colors of ink are red, black and blue-black. Red ink is generally used to correct homework, and the scope of use is relatively small. Blue and black ink is deep and solemn in color, not easy to fade, and writing is smooth. It is an ink commonly 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. Used to write pen words or pen calligraphy works, the effect is the best. Ink should be of the same brand and color, and cannot be mixed, otherwise it will cause chemical reaction and precipitate, which is not good for writing. Wear a pen cap in time after each writing, otherwise the ink on the pen tip will dry, and the water will not be smooth when writing again. If you want to use another ink, you should wash your pen and dry it before loading new ink. But I personally think that if you stay in this environment for a long time, of course, it is not good for your health. A small amount will not cause harm to human body.