Description: The viscosity change of water-based ink is related to the following points:
1. The ink has a certain viscosity at a certain temperature (25 ℃). The viscosity of the ink decreases with the increase of temperature, and the viscosity increases with the decrease of temperature. Such an inversely proportional property.
2. The change of viscosity has a subtle effect on the migration area of the ink migration or the flow mode of the dots, especially in multi-color printing. If the room temperature changes greatly, the migration state will change, and the color tone will often change. This is because the temperature change affects the change of ink viscosity.
3. The fluidity of the ink
The characteristic of ink flowing under the action of external force and gravity is usually called the fluidity of ink. There is a close relationship between the fluidity of ink and viscosity. When ink increases viscosity, it will reduce its fluidity, and vice versa.
4. Ink with high consistency is not equal to high viscosity, but ink with high viscosity is not necessarily thick. Only the ink with the same viscosity, the greater the consistency, the worse the fluidity.
If the fluidity is too small, the ink will not spread smoothly and uniformly, causing the same printing surface to fade and deepen;
Excessive fluidity causes uneven distribution of ink, unclear printing levels, insufficient ink color, enlarged dots, etc.
The viscosity change of water-based ink is related to the following points:
1. The ink has a certain viscosity at a certain temperature (25 ℃). The viscosity of the ink decreases with the increase of temperature, and the viscosity increases with the decrease of temperature. Such an inversely proportional property.
2. The change of viscosity has a subtle effect on the migration area of the ink migration or the flow mode of the dots, especially in multi-color printing. If the room temperature changes greatly, the migration state will change, and the color tone will often change. This is because the temperature change affects the change of ink viscosity.
3. The fluidity of the ink
The characteristic of ink flowing under the action of external force and gravity is usually called the fluidity of ink. There is a close relationship between the fluidity of ink and viscosity. When ink increases viscosity, it will reduce its fluidity, and vice versa.
4. Ink with high consistency is not equal to high viscosity, but ink with high viscosity is not necessarily thick. Only the ink with the same viscosity, the greater the consistency, the worse the fluidity.
If the fluidity is too small, the ink will not spread smoothly and uniformly, causing the same printing surface to fade and deepen;
Excessive fluidity causes uneven distribution of ink, unclear printing levels, insufficient ink color, enlarged dots, etc.
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