1, golden pen. The nib is made of gold alloy, which is soft, elastic and comfortable. But the gold pen is expensive, soft and difficult to master, so it is not suitable for beginners.
2. Iridium pen. The nib does not contain gold, and it is partially gilded. The nib is hard, but it is cheap and good. It is a tool suitable for beginners to write. The reason why gold nib and iridium nib are more durable than pen nib lies in the small round particles on the pen nib. This small round particle is made of iridium ruthenium alloy, which is very hard and wear-resistant.
3. Ink bag pen. The ink bag pen does not need to absorb ink, but it can be used by inserting a special ink bag.
Extended data:
The earliest pen = a pen that can absorb ink by itself appeared in the early 20th century, and used a piston to absorb ink. When using a bladder in a pen, insert an iron sheet into the gap to squeeze the bladder to absorb ink. At 1952, there appeared a snooker pen with a tube inserted in the ink to absorb water. The commonly used capillary pen was not invented until 1956. And some art pens.
How to choose a pen in real life;
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.
References:
Baidu encyclopedia-pen