The difficulties of tip-making
The precision of the cutting and grinding the nib relies on the tools of the precise instrument, and the quality of the hard alloy can directly affect the performance of the cutting and grinding operations.
The difficulties of ink-making
Ink can be divided into two types – the pigment ink and the dye-based ink。 The difficulty and cost of making dye-based ink are comparatively low, but this kind of ink discolors easily. While, the pigment ink is waterproof, lightproof and fadeless, so it is the best choice when making the high quality gel ball pen. But there is a shortcoming for the pigment ink – the particle that is contained inside the ink and cannot be grinded easily, finally becomes the agglomeration to make writing impossible.
So, how to grind the particle as possible as you can and make it to be separated instead of agglomerated is a big problem. But fortunately, after the studies of so many years, this problem has been settled basically. Even so, the strictest process procedure and the quality control system are still needed to eliminate this problem.
The matches of ink and tib
When the ball at the front of the pen tip rolls continually, the letters are printed in the paper. So the matches of ink and nib are the key factor for fluent and smooth writing. Because there are many specifications for the size of the pen tip, how to correctly math ink with different kinds of pen tip is a big problem.
So far, only through strict test and process control, the ink and different kinds of pen tips can be matched with high level to insure the smooth and fluent writing.