It starts with pen
Air pressure is forcing the ink out of the tube.
needle? The part of a pen that starts with "n" is NIB. The nib is the writing part of the pen.
A fountain pen may leak at higher altitudes due to changes in air pressure affecting the ink flow within the pen. The lower air pressure can cause the ink to expand and contract more, leading to potential leaks through the nib or cartridge. It is advisable to store fountain pens in a horizontal position or with the nib pointing upward to minimize the risk of leaking.
A fountain pen might leak at higher altitudes due to changes in air pressure. As the altitude increases, the air pressure decreases, causing the ink inside the pen to flow more easily or even leak out. This can result in messy ink spills.
Thank you so much it helped me for a test
a squid with a leaking pen
PEN
pen
a fountain pen starts leaking at higher altitudes because the difference in air pressure is less than it is on the ground so the ink flows quicker so not exactly a leak rather you not being able to keep up with the flow from the cartridge.
'Nib' is the writing point of a pen.
pentagon