(1) Double brushes: made of more than two different kinds of terry. Generally made of wolf hair or purple hair combined with wool. Some people directly refer to the double brushes as double brushes, while others indicate the amount of ingredients, such as three-purple seven-sheep, seven-purple three-sheep and five-purple five-sheep.
(2) Wool: The pen is made of goat hair. Wool pen is soft in texture and absorbs a large amount of ink, which is suitable for writing with round and solid stippling. More durable than a wolf's brush. Most of these pens are lake pens, which are relatively cheap.
(3) Wolf hair: The pen is made of the hair on the tail of the weasel. The rat tail produced in Northeast China is the most common, and it is called "North Langhao" and "Guandong Liao Wei". Wolf hair is stronger than wool pen and suitable for writing and drawing, but it is not as durable as wool pen and more expensive.
Simply put, wool is soft, and the words written are round and beautiful; The wolf is hard and the words written are vigorous and powerful. For beginners, the so-called "soft" and "hard" are difficult to grasp accurately, so it is suggested to use a double-strand brush pen (double-strand brush: the pen is made of two kinds of animal hair with different hardness. Common breeds are two-headed wolf brush sheep and two-headed purple brush sheep. This kind of pen has the advantages of a sheep's pen and a wolf's pen. It is both rigid and flexible, and the price is moderate. It is commonly used by painters and painters. Double-sided brush has moderate hardness and is suitable for beginners.