Baiyun pen belongs to double brush.
Hard and elastic, less ink, faster ink; Soft and elastic, with more ink and slow ink; Double brush combines the advantages and disadvantages of the first two. Even so, it is wrong to say that double brushing is the best.
Baiyun pens are mostly wool pens (including double-strand brushes), and the production materials are mostly wool. Both brushes are made of wolf hair, wool and rabbit hair. Double the two brushes are hard, and the wool pen is soft.
The characteristics of small white cloud pen:
Small white cloud brush is a pen made of wolf hair, wool and rabbit hair. Most of the materials are wool. Double-stranded brush is hard, while wool pen is relatively soft. The outer layer of the white cloud pen is wool, and the middle part is hard and hard, which can hold water and is elastic. Some white clouds brushes are made of all wool and are very soft.