According to the usual writing habits, westerners usually use the M-tip as the main pen and choose the B-tip when signing. Due to the complexity of Chinese writing strokes, F or thinner EF pen tips can generally be used.
F=Fine represents the pen tip width: 0.28 mm ~ 0.34 mm
M=Medium represents the pen tip width: 0.34 mm ~ 0.44 mm
Therefore, the nib of F-shaped nib is thinner than that of M-shaped nib.
A pen is a writing instrument mainly made of metal. It contains ink (mostly black or blue) through a hollow pen tube, and then writes through a duckbill pen through gravity and capillary action. It can be said that it is a writing tool of western calligraphy. Most pens can be replenished with ink. Generally speaking, vials or straws such as eye drops are used to supplement the kit. The earliest historical record of fountain pen can be traced back to 10 century, and this earliest fountain pen has been used until 18 century. The development process was very slow, but it was not until the beginning of the 9th century that a pen with stable and accelerated flow was invented in the production process. Only three key inventions have made the pen a widely popular writing tool. These inventions are: gold nib made of iridium, hard rubber and free-flowing ink.
The first pen using the above three key inventions was made in AD 1850. But it was not until A.D. 1880 that mass production began. Wortmann and Wilt were the main producers at that time.
At the beginning of the 20th century, American pens were introduced into China and distributed in coastal cities. After that, Conklin, Eversharp, Pelikan, Sheaffer, Parker and other brands of pens poured in.