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Because as altitude increases, air pressure decreases. As the plane rises, the air pressure inside the pen is higher than outside it causing the ink to spill out.

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Why does a pen have ink?

Because it is an Ink pen.


How much ink does a pen have in it?

a pen has about 75% ink in it


What is difference between ball-pen and gel-pen?

ball pen is ink. gel pen is a gel-like ink.. but not ink itself.


Pen is to paper as pen is to?

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The thing that you can buy for your pen is an Ink Cartridge. And the thing that makes your pen work is an Ink Cartridge


What do you call a pen that has run out of ink?

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Is ink pen best than ball pen for board exam?

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Why are you advised to empty ink from your fountain pen before boarding an airplane?

Although a plane is pressurized it is not pressurized completely to ground or takeoff level. As the plane climbs the air pressure in the cabin is decreased with higher altitude. A typical airliner has the equivalent cabin altitude of 5,000 to 8,000 during cruise. The difference in pressure between the cabin air and that inside the ink cartridge of the pen draws out the ink as the pressure inside the pen is more than that outside.


Does nail polish remove pen ink?

No, nail polish can not remove pen ink. Nail polish -remover- might remove pen ink but I am not sure.


Is a pen made out of ink?

No, a pen can be made from various materials e.g. a quill, metal, plastic, but not ink, the pen is filled with or dipped into ink prior to use.


How do ink pen work?

An ink pen works by transferring ink from a reservoir within the pen to the paper. When the pen tip is applied to paper, the ink flows due to capillary action, creating the writing or drawing on the surface. The friction between the pen tip and the paper allows the ink to be released in a controlled manner.