What effect does the size of ink viscosity have?
author: Uvink
2022-12-16
What effect does the size of ink viscosity have?Viscosity can also be called internal
friction or cohesion. From physics, its direction of force is the opposite of the direction
of liquid flow, and it is a resistance to flow. In the case of ink transfer to explain,
the production of viscosity is based on the process of transfer, the ink layer is pulled
apart, and in order to contend with the tension, so there is another inward force, this is
the viscosity. Lithography often requires ink to have a certain viscosity, so that when
the ink is spread on the surface, there is a certain adhesion, so that the dot is clear;
On the other hand, it can make the surface of the roller line speed is equal to help the ink
evenly transfer and maintain a certain thickness of the ink layer.
What effect does the size of ink viscosity have?The viscosity is too high, the ink transfer is
easy to be uneven, the paper wool and powder are easy to peel off, and the paper is
difficult to peel from the rubber roller, the printing quality is greatly affected; And the
viscosity is large, the ink will spread slowly in the printing plate, the ink layer on the printing
plate, after a few times of rotation, the remaining ink layer is not enough to protect the layout,
the result will not be able to withstand the pressure of printing and the function of the water,
so that the printing plate is easy to spend. But the viscosity is too small, and will make
the ink is too easy to emulsify, dirty, so that the printing quality is not good.
friction or cohesion. From physics, its direction of force is the opposite of the direction
of liquid flow, and it is a resistance to flow. In the case of ink transfer to explain,
the production of viscosity is based on the process of transfer, the ink layer is pulled
apart, and in order to contend with the tension, so there is another inward force, this is
the viscosity. Lithography often requires ink to have a certain viscosity, so that when
the ink is spread on the surface, there is a certain adhesion, so that the dot is clear;
On the other hand, it can make the surface of the roller line speed is equal to help the ink
evenly transfer and maintain a certain thickness of the ink layer.
easy to be uneven, the paper wool and powder are easy to peel off, and the paper is
difficult to peel from the rubber roller, the printing quality is greatly affected; And the
viscosity is large, the ink will spread slowly in the printing plate, the ink layer on the printing
plate, after a few times of rotation, the remaining ink layer is not enough to protect the layout,
the result will not be able to withstand the pressure of printing and the function of the water,
so that the printing plate is easy to spend. But the viscosity is too small, and will make
the ink is too easy to emulsify, dirty, so that the printing quality is not good.
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