täytekynä

Täytekynä, also known as a fountain pen, is a writing instrument that uses liquid ink. Unlike ballpoint pens, which rely on a rolling ball to distribute ink, fountain pens have a metal nib with a slit. Ink flows from a reservoir inside the pen, through the slit in the nib, and onto the paper via capillary action. This design allows for a smooth and consistent writing experience.

Fountain pens typically use ink cartridges or a converter, which can be refilled from an ink bottle. The nibs come in various sizes and materials, most commonly stainless steel or gold, and affect the line width and writing feel. Common nib sizes range from extra fine to broad.

The history of the täytekynä dates back to the 10th century, with significant developments in the 19th century leading to more practical and widespread use. Early designs were prone to leaking, but improvements in sealing and ink delivery systems made them more reliable. Today, fountain pens are appreciated by many for their writing quality, aesthetic appeal, and the ritual of refilling them with ink. They are used for everyday writing, calligraphy, and as collectible items.