Black carbon pen, the ink in the refill is mainly composed of graphite, which is one of the most stable substances in nature. Black gel pen is also called gel pen, signature pen, ballpoint pen or ballpoint pen. It's an upgraded version of a ballpoint pen. Black gel pen contains an organic solvent, which is lower in viscosity than oily ink and thicker than water-based ink, so it is called black gel pen.

Second, the writing is different.

Black neutral ink is different from ordinary ink, which is not only smooth, but also lubricated. Lubricant is added to reduce the friction between the ball and the seat, so as to minimize the loss of kinetic energy and obtain a more comfortable writing feel. But the writing fluency of black carbon pen is not as good as that of black gel pen.

Third, the difference between written materials.

There are many kinds of black gel pens on the market, including stainless steel, nickel-white copper and lead brass. According to the different materials of balls, they can be divided into tungsten carbide balls and modified ceramic balls. According to the structure of the pen, it can be bullet, gourd head, needle tube and so on. The nib of black carbon pen is divided into cannonball type and needle tube type, which are made of copper alloy, stainless steel or engineering plastic respectively. Most balls are made of stainless steel, cemented carbide or alumina.

Baidu encyclopedia-gel pen

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