2. The bristle pen is more suitable for direct drawing, which is popular in China, and is suitable for thick coating of pigments and shaping brush strokes. Plain pen is very popular in China. The shape of this pen is similar to chalk. A good quality flat bristle pen will not be completely square, but will have radians, full bristles, which are not easy to shed by hand, and feel more elastic, not very hard, while a poor quality bristle pen is hard and brittle.
3. There are also bristle pens with round heads, which are widely used abroad and rarely sold and used in China. If you don't know how to use it, there is no need to buy it. Sable brush is suitable for the so-called classical techniques of traditional indirect painting, mostly with a round head and a pointed tip, and generally with a small nib. However, few people in China really understand and master this technology, so it is of little use to beginners.