What pen does the official script use?

Official script generally uses the brush with wolf hair or double brush, seal script, official script and regular script are all suitable for wolf hair or double brush, running script or cursive script is suitable for Yang Hao or double brush, and the specific font of calligraphy should be determined according to specific needs and personal habits. Before the Qing Dynasty, all calligraphy was written with hard pen. Yang Hao's brush only appeared in the middle of the Qing Dynasty, and the pen-making technology was also developing. People who are good at calligraphy have no special requirements for using pens, but when they first learn calligraphy, they will still choose the right brush according to the different fonts. Double-stranded brush is the most commonly used brush for writing official script. Double-stranded brush is a kind of brush between Yang Hao's pen and Langhao's pen. It is very flexible when writing and absorbs a large amount of ink, which is very suitable for writing. Sheep hair is made of the tail hair of Qingyang or antelope, which is more suitable for calligraphy with heavy brushwork. The written words are soft and have no strokes, and the ink absorption of sheep hair is relatively large. The strokes written are round and thick, and the wool is very durable. Pay attention to the swallowtail of the silkworm head when using the pen in official script, so when writing, pay attention to writing the strokes in a shape similar to that of the silkworm head, and pick them obliquely to the upper right when receiving the pen.