Oily Ball Pen

The ball of the pen head used is mostly made of stainless steel or cemented carbide. The size of ball diameter determines the size of handwriting lines. Common ball diameters are 1 mm, 0.7 mm and 0.5 mm (the body or core of the product is often marked). The ink of ballpoint pen is specially made, which is mainly composed of colors, solvents and tackifiers. Common colors are blue, black and red. Common ink is mostly used for general writing, and special ink is mostly used for file writing. Ink for file writing is usually marked on the core, such as DA on the domestic core.

Oily ballpoint pen is the first product of ballpoint pen series. It has been more than 60 years since it was put on the market in batches. After long-term improvement and perfection, the production technology of oil ballpoint pen is mature, the product has stable performance, long shelf life and stable writing performance. It has become a traditional product of ballpoint pen products. The ink viscosity of oil ballpoint pen is high, so the writing feel is relatively heavy.