The four virtues of writing brush are fingertip, roundness, neatness and health, among which the sharp tip of writing brush should be sharp, the wool should be good and the round tip should be smooth to improve writing ability, while the sharp tip means that the wool should be flat, which is beneficial to the uniform stress of writing brush, and the healthy tip means that the writing brush can recover quickly after deformation.
Sharp: When the pens are gathered together, the ends should be sharp. The pen tip is easy to write and express. Writers often refer to their pens as "bald pens", but if they are not sharp, they will become bald pens, and there will be no spirit in writing books. When buying a new pen, the hair is glued and polymerized, which is easy to distinguish. When checking the old pen, first wet the pen and gather the hair, then you can distinguish the sharp baldness.
Health: the elasticity of the pen waist; Press hard, lift the pen, and then return to its original state. If the pen is flexible, it can be used freely; Generally speaking, rabbit hair and wolf hair are more elastic than wool, and their writing is firm and firm. In this regard, press the pen after wetting, and the front is straight and healthy.
Qi: refers to the pen tip after it is flattened with water. If the brush is neat, the length of the brush is equal at ordinary times, and there is no gap, then it is "ten thousand Li Qi" when writing. Because the pen needs to be completely wet, it is difficult to check this when buying it.
Round: it means that the pen is as perfect as a jujube pit, which means that the hair is sufficient. If you have more hair, you will have enough pen power to write, otherwise you will lose weight and lack pen power. The pen is perfect. The pen can turn. When shopping, there is glue in your hair. Is it perfect? Just take a closer look.