Question

While travelling in aeroplane, it is advisable to remove ink from fountain pen. Why?

Answer 1

Any air in the ink chamber will remain near the nib this way. The reason ink leaks during flight is because the pressure in the airplane cabin drops as you leave the ground and go up into the air. This means the pressure in your pen is higher than the surrounding environment, and when that happens…it wants to equalize.

Answer 2

Answer:

The empty space in your cartridge or barrel (where ink isn't present) contains air. The air pressure inside the cabin is lowered during flights. This makes the air inside the barrel expand, making it push out through the nib