0.5 refers to the diameter of the pen tip, which refers to the width of the strokes of the written words. Generally, 0.5, 0.7, and 0.9 are commonly used, and those below 0.3 are generally used as financial accounting pens.

Bullet type If we look closely at the pen tip of this gel pen, we will find that they look like a bullet. During the manufacturing process, we use metal cutting to cut a raw rod into a complete pen tip. The bullet type is suitable for making thicker pen tips. The most common ones on the market are 0.5MM, and the thickest ones can reach 1.2mm.

Extended information

Ensuring good ink stability is one of the most critical technologies for neutral ink. First of all, it is necessary to ensure that the pigment is highly and effectively dispersed, and it is also necessary to promote the stability of the highly dispersed pigment without re-agglomeration.

At the same time, it is also necessary to overcome the binding of the pigments by the colloid in the neutral ink, which will destroy the reasonable dispersion of the pigments. This is a stable guarantee for the system. According to the unique characteristics of the pigment, raw materials with suitable color, loose particles, small degree of polymerization, and easy dispersion must be selected as the color base of the ink. Dispersing and grinding the pigment is the first step to ensure the stability of the ink, and it is also an important step in the production of neutral ink. link.

The color paste used is also a dispersion system, which itself has a tendency to be unstable. When the dispersant wrapped or adsorbed on the pigment particles is competed by other substances or the charge performance is destroyed, the pigment particles are affected by each other. When external force is pulled, unstable situations such as aggregation, settlement, and even sedimentation and stratification between pigment particles are likely to occur.

The thickener dissolves in water and forms its own system with other solvents and additives. When this system is miscible with the color paste system, there is a system that is compatible with the color paste system. problem, it is this problem that leads to the existence of neutral ink stability problems.