Water-based pen is usually used on paper, and it is easy to erase when used on whiteboard or sample. Oily pens are generally used for sample signatures or other permanent marks. Oily pens are difficult to wipe, but they can be cleaned with alcohol.
The classification is as follows:
1. Signature pens with ballpoint pen structure can be divided into water-based and oil-based according to the different ink components used. The ink used for neutral signature pen is between water-based and oil-based, also called "neutral pen".
2. A signature pen with a fiber tip is soft and comfortable to use, and will be recognized more and more. It is constructed like a ballpoint pen and feels like a pen when writing.
Signature pens can also be divided into broad sense and narrow sense. Broadly speaking, pens used for signature are all called signature pens. For example, Parker's signature pen and Montblanc's signature pen, which are often used now, are all pens that we have been using since childhood. In a narrow sense, it refers to carbon ink pen or above, while the exam uses a narrow signature pen, that is, carbon ink pen.
Refer to the above? Baidu encyclopedia-signature pen