The formal examination requires the use of 0.5 mm black pen, because when answering non-multiple choice questions, the handwriting should not be too thin, otherwise it will lead to unclear scanning results and affect the teacher's marking; Don't write too thick, because the space on the answer sheet is limited, and there may be insufficient space. The 0.7 mm signature pen is relatively thick, which is more suitable for ordinary writing and signature.
The "signature pen" often mentioned by the signature pen is actually a functional description with a wide range.
The classification is as follows:
1. The signature pen with ballpoint pen structure can be divided into water-based and oil-based according to the different ink components. The ink used for neutral signature pen is between water-based and oily, also known as "neutral pen".
2. Signing pens with fiber tips are soft and comfortable to use, and will be more and more recognized. 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.