Cause of ink leakage from ballpoint pen


a) From the pen tip

a-3) In case the cap is not correctly fitted

Many cap type ballpoint pens are equipped with parts to cover the tip of the pen so that the ink will not dry out.
Close the cap tightly until it sounds "snap" and lid the tip of the pen as shown in the illustration .

In the incomplete closing of the cap, the ink at the pen tip will dry up, or the pen tip will come into contact with the lid as in the illustration , capillary phenomenon (see a-2) will occur and the ink will come out from the pen tip It may leak out.
If the fit of the cap becomes loose, we recommend replacing the pen.