A signature pen is a pen specially designed for writing and signing. It usually uses special ink or ink to ensure smooth writing, rapid drying and not easy to fade. The tip of a signature pen is usually very thin to facilitate detailed writing and signature. The design of the signature pen is also diversified, and there are many styles and colors to choose from. Pen is widely used in office, law, bank and other fields, because it can provide a clear, stable and lasting writing effect, making the signature more formal and reliable.