The wettability of the ink refers to whether the ink can spread evenly on the printing plate, which is closely related to the contact condition of the surface of the printing material. Viscosity is an important physical characteristic of ink, which refers to the internal resistance caused by the interaction between molecules inside the ink, and is usually used to describe the viscosity of ink.
Viscosity has an important influence on the wettability of ink. Specifically, the ink with too high viscosity is easy to form an uneven film when it is in contact with the printing material, which makes it difficult for the ink to wet the surface of the printing material evenly during printing, thus affecting the printing quality. In addition, ink with too high viscosity will also reduce the ability of the ink to be transferred to the printing material, affecting the printing speed and efficiency of the ink.
On the contrary, ink with too low viscosity may form an overly thick ink film on the surface of the printing material, resulting in increased ink fluidity, making it difficult to maintain stable printing quality during printing.
Therefore, the viscosity of the ink has an important influence on its wettability. In practical applications, it is necessary to select the appropriate ink viscosity according to the characteristics of the printing material and the requirements of the printing process, so as to ensure the uniform wetting and transfer ability of the ink during the printing process.