The principle of the dip pen is the same as that of common art pens. In the 1990s, teachers used similar pens to mark papers. The characteristic is that the pen tip is relatively soft and can draw varied lines depending on the force and angle. The disadvantage is that the thickness of the lines is not easy to control, it is easy to scratch the paper and splash ink, and it wears out quickly. Needle pens have uniform lines, are very stable, and come in a variety of diameters, which can be very thin. Especially you can do intensive dot painting work. If you do this with a dip pen, you will splash on your face. Because the pen tip will also wear out, it is generally a disposable product, but there are also styles that can be filled with ink. The disadvantage is that it is relatively rigid and the pen tip is easy to break. Both are used for drawing lines, but you can choose freely according to the needs of the situation and painting style. However, if you are a novice, you should first buy a pack of gel pens to practice drawing lines. If you use professional tools rashly, it will be difficult to get started and the drawing will be ugly. The G pen is a type of dip pen. The line effect is very good when processing line drawings, but ink will splash if you are not careful. Generally, using a needle pen to process logo-style images will be very stable. However, due to the small diameter of the needle pen, a very grand effect can be created through intensive dotting techniques.