How long can carbonless ink be kept? Can I continue to use this ink after its two-year shelf life?

Generally, the shelf life of carbonless ink is about two years, after which the ink cannot be used.

Common colors of ink are red, blue, 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.

Extended data:

Precautions:

When the ink is stored outdoors or at different temperatures, it must be kept at ambient temperature for several days, or before it is reused, the ink barrel must reach a suitable working temperature. This is because the use of Leng Mo will cause screen printing failure, causing unnecessary trouble. Therefore, in order to maintain the quality of ink, it is best to store it at room temperature.

Before use, the ink must be fully and carefully mixed by hand or mechanical means. If air enters the ink, let it stand for a while when using it. If dilution is needed, it should be thoroughly mixed first, and then its viscosity should be tested. The ink box must be sealed immediately after use. At the same time, don't put the ink on the screen back into the Mo Dou and mix it with the unused ink.

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