The iridium particles are silver metal balls that are welded to the tip of the pen at high temperature and are in contact with the paper. Because it is more wear-resistant, it can reduce friction loss and increase the life of the nib during writing, so that the nib will not become thicker due to the wear and tear caused by a lot of writing. The wear resistance of iridium particles depends not only on the metal made, but also on the smelting process and the type of paper.

smelting
Due to the special composition of iridium particles, the melting point is very high, and smelting has become a big problem. Moreover, defects such as bubbles and cracks will also greatly affect its wear resistance. Therefore, major pen factories at home and abroad have various unique smelting methods. Such as the air arc melting process of Shanghai Iridium Particle Manufacturing Plant, the argon flame arc melting method, the powder metallurgy method of Parker, and the suspension ball method of Japan Baile.
wear
Wearing of iridium particles is a complex process. First, the high hardness and small particles in the paper will make groove marks on the surface of the iridium particles, and then the side walls of the groove marks will break, and the groove marks will become shallow and smooth. Week by week. Therefore, the effect of different papers on the wear of iridium particles is significant.