In the market, the neutral pen variety is complex, the style neutral advertisement pen is different, how should the consumer choose the appropriate self neutral pen?
1, the tip of the pen
Pen tip diameter: Asians love 0.5mm or smaller diameter balls, and the European beautiful people love big diameter balls.
Ball bead material: tungsten carbide, stainless steel, ceramic. Now the neutral pen manufacturers have a better induction of tungsten carbide.
Tee: nickel copper nickel alloy, stainless steel, brass. The better from the inductive function is the stainless steel.
As the neutral pen ink is not skilled at present, if the process of storage, processing and transportation is questionable, it simply presents a variety of questions. So please be careful. Choose a variety of methods to write, such as a continuous number of consecutive writing numbers "8", not only to test the smoothness of the pen, but also to see if the ink is even. Others can be discriminate through other elements, such as less bubbles in ink and even no quality control for printing ink. The error of ink height with 5-10mm is reasonable.
3, tail plug oil
It is now extracted from minerals and from petroleum. Oil extracted from oil is usually bright and colorless, usually with less impurities, and is also superior to yellow tail plug oil. The other can be distinguished by writing, which is very important.