Do you have a friend who knows how to write? Is a pen better or a ballpoint pen? Ask for reasons!

in a nutshell, a ballpoint pen or a ballpoint pen is a water-based ballpoint pen. Oily ballpoint pen is commonly known as ballpoint pen. Most of the ball heads used are made of stainless steel or cemented carbide. The diameter of the ball bead determines the thickness of the writing lines. There are three common ball diameters: 1 mm, .7 mm and .5 mm (usually indicated on the pen body or ballpoint pen core of the product). The ink of ballpoint pen is specially made, which is mainly composed of pigment, solvent and viscosity regulator. Common colors are blue, black and red. Ordinary ink is mostly used for general writing, and special ink is mostly used for file writing. The ink used for file writing is generally marked on the refill, such as the domestic refill with the word DA. Oily ballpoint pen is the first generation of ballpoint pen series products, which has been put on the market in batches for more than 6 years. After long-term improvement and perfection, the production process of oily ballpoint pen is mature, the product performance is stable, the storage period is long, and the writing performance is stable. Now it has become a traditional product variety in ballpoint pen products. The ink used in oily ballpoint pen has high viscosity, so the writing feel is relatively heavy. Water-based ballpoint pen is also called ball pen or ball pen. The pen holder and pen of the ballpoint pen are made of plastic injection molding, which is called all-plastic ballpoint pen; The pen is made of stainless steel by stamping and grinding, which is called semi-steel pearl pen; Pen holder and pen cover are all made of stainless steel, which is called all-steel ballpoint pen. All plastic types are basically disposable, that is, the ink is discarded when it is used up; Semi-steel type and all-steel type mostly adopt replaceable refill structure. The tip of the ballpoint pen is divided into two types: cannonball type and needle tube type, which are made of copper alloy, stainless steel or engineering plastic respectively. Most of the balls are made of stainless steel, cemented carbide or alumina. The diameter of the ball in Chinese writing is .7 mm, and the diameter of the ball in fine writing is .5 mm.. There are two forms of water storage: fiber bundle water storage and fiber bundle water storage. The colors of ink are red, blue, black and green. Ballpoint pen has the characteristics of both pen and oily ballpoint pen, and it is an ideal writing tool with smooth writing lubrication and even lines.