Factors affecting surface tension and interfacial tension in printing

1 kind of liquid. Different liquids have different intermolecular forces, and the intermolecular forces are large and the surface tension is large. Water has a large surface tension, while oil has a small surface tension.


2 temperature. When the temperature rises, the attraction between the liquid molecules weakens, and the density of the coexisting vapor increases. The surface molecules are reduced by the attraction force of the molecules inside the liquid, and the gravity of gas molecules increases, and the surface tension decreases. As the temperature of the printing shop increases, or the machine heats up during the printing process, the temperature of the ink and the fountain solution will increase, causing the surface tension of the ink and the printing plate solution and the interfacial tension between them to decrease.


3 A solvent dissolves in Other substances and the surface tension changes. If you add a small amount of surface active punishment in pure water, the surface tension will drop sharply.

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