The wool brush is made of goat hair. The brush is soft and has strong ink absorption ability, which is suitable for writing round and thick stippling. More durable than a wolfsbane pen. Usually there are big regular script, Jingti, Lianfeng, Feng Ping, Gaifeng, horizontal bar, bamboo shoots, Yulanrui, Jingzha and so on. Many wolf pens are made of fine hairs on the tail of weasels. The wolf's pen is stronger than the sheep's, and can be used for writing or drawing, but the pen is often not as long as the sheep's and the price is more expensive than the sheep's. Common varieties include Zhu Lan, bamboo slips, landscape paintings, flowers and plants, clothing patterns, red beans, small and exquisite, deer and wolf hair painting and calligraphy (deer hair plus wolf hair), leopard and wolf hair (wolf hair plus wolf hair), specially-made long-peak wolf hair, long-peak wolf hair with particularly long length and so on. The purple brush is made of rabbit hair, so it is named after its purple-black color. This brushwork has a sharp nib and is more elastic than wolf hair.
3. The double brush is mostly matched with simplicity and softness, mainly with Hao Jian, in the middle, called "pillar"; Soft outside and rigid inside are "pillars", which is called "pillars". The column length is shortened, that is, the so-called "column with quilt" brushwork. There are also multiple layers of bedding, rabbit hair as columns, a short wool quilt, and something as long as the bedding, which has three layers of * * *, so its roots are particularly thick and tapering, storing more ink and easy to write. The function is different according to the mixing ratio, either rigid or soft, or both, and it is cheap and labor-saving, which are its advantages.