Dip pen, also called dip pen, is a kind of pen, but it is different from ordinary pen. Ordinary pens are mostly needle tube type or pen container type, all of which belong to water storage pens. The dip pen has neither a needle tube for absorbing water nor a refill for storing water. When writing, they write by dipping, relying on a little ink contained in the tongue under the nib. Obviously, this pen is not suitable for writing long articles, but is more suitable for signing. Please refer to the following figure: