A pen is a pen-based writing instrument that mainly uses metal as a pen. It is filled with ink (mostly black or blue) through a hollow pen tube, and is written by gravity and capillary action, and then written by a duck-billed pen. No, it can be said that it is a writing instrument for Western calligraphy.
A pen is a pen-based writing instrument that mainly uses metal as a pen. It is filled with ink (mostly black or blue) through a hollow pen tube, and is written by gravity and capillary action, and then written by a duck-billed pen. No, it can be said that it is a writing instrument for Western calligraphy. Most of the pen's ink can be refilled, usually using a vial such as eye drops or a straw to fill the ink. The earliest history of water-filled pens dates back to the 10th century, and the earliest water-filled pens were used until the 18th century. The development process was slow, but it was not until the early 19th century that a pen that stabilized the accelerated flow was invented during the production process. Only three key inventions have made the pen a widely popular writing instrument. These inventions are: tinned gold pen tips, hard rubber and free-flowing inks.
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