The nib, which can be said to be the most critical part of the pen, varies in thickness. Generally speaking, the most common pen tip sizes are "B (wide), M (medium), FM (thin-medium), F (thin) and EF (extra thin)".

From coarse to fine, it is B > M>F & gtEF, and there will be some differences in the specifications of each pen manufacturer. Under the same size unit, the Japanese pen will be thinner than the European pen.

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.

2. Hold your ground?

The assembly formed by wrapping and fixing the pen tip and tongue with tubular material is called the holding position. The position of grip is closely related to the comfort of grip. In addition to the common circular cross section, various ergonomic designs often contain the ingenuity of designers. In addition, the friction, hardness, size and shape of the pen holding position also have a great relationship with the writing feel.

3. Pen container

The tubular structure connecting the holding position and covering the ink storage device is called a pen holder. The material and shape of the pen holder are variable. The design is divided into general size and short rod. When writing with a short rod, the pen sleeve is sleeved at the end of the pen holder, and the increased length makes it more comfortable to hold and write.

4. Water supply/ink storage mechanism?

The ink supply/storage mechanism includes dropping ink supply, ink box ink tube, piston ink supply, ink absorber, pressure bag ink supply, pull rod ink supply, underwater ink supply, etc.

Drip ink is directly stored in the pen tube behind the handle. When replenishing ink, loosen the grip and directly inject ink into the pen tube with the dropper. The advantage is that the ink storage capacity is large, and the disadvantage is that it is easy to seep out and cause pollution.

Extended data:

First of all, the history of the pen

Pen is a writing tool with metal as the main body. 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 the 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.

Second, the pen selection method

1, pen tip smoothness You can pull out the pen cover and move the pen tip on white paper. Generally, the grinding difficulty of nib is the side. We do experiments and move the pen 30 degrees to the left and 30 degrees to the right on the white paper. If it is still smooth, it means that the sliding of the pen tip is guaranteed.

2. The main reason of water leakage is that the pen container is not well sealed. We can plug the nib and squeeze the liner. If it is difficult to squeeze, it shows good water leakage resistance. Of course, water leakage resistance is a comprehensive parameter.

3. Continuous writing time and intermittent writing time are the soul of a pen. If you buy a pen, you can't guarantee continuous writing and intermittent writing, which is equivalent to waste. According to the width of handwriting, the writing time is different. But usually it takes at least 30 minutes.

4, some mechanical properties, such as pen clamping force, mechanical properties of parts, pen sleeve tension, these are all concerned by users. Generally, mechanical properties can be tested by hand without any instruments. Users can pay attention to these details when choosing. Especially some expensive pens.

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