Fountain pen

A fountain pen is a writing instrument, more specifically a pen, that contains a reservoir of liquid ink composed primarily of water. The ink is held in the reservoir by air pressure until needed, at which time it is fed to a nib through a "feed" via a combination of gravity and capillary action. Refilling ink either involves replacing an ink cartridge, filling the pen with an eyedropper, or using one of a variety of internal mechanisms to suck ink from a bottle. Older pens squeezed and released a rubber sack to create the suction needed. Most modern pens use a screw and piston to create the vacuum.

Related Topics:
Writing - Pen - Ink - Air pressure - Gravity - Capillary action - Eyedropper - Suck - Bottle

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