1, the main component is different: the main component of pen ink is iron tannic acid, which can form clear lines on paper. The main component of brush ink is carbon black, which is very thick and very suitable for the needs of brush calligraphy. Because of the different components, the writing effect and expressive force of the two inks will be different.
2. Different viscosity: Compared with ink, ink has higher viscosity and lower purity. Ink is easier to stay and spread on the brush, which makes calligraphy works more fluent and changeable.