UV ink problems that must be understood in printing.

author: Uvink

2022-12-29

How the characteristics of the ink determine the amount of fountain

solution and the fluidity of the ink can affect the amount of fountain

solution used in printing. In the printing process, one of the reasons

for using fountain solution is to make it easier for clean water to form

a water film on the non image parts, making it difficult for the ink to

spread to these parts. If the fluidity of the ink is small, it will spread

slowly on the printing plate, and the ink will stay in the non image part for a

short time. In this case, we can use less fountain solution; On the contrary,

if the fluidity of the ink is large, we should appropriately increase the amount of

fountain solution to prevent the ink from sticking in the non image part.

What will happen to the emulsion of ink?UV ink problems that must be

understood in printing.If the ink is emulsified, it will produce the following changes:

since the water molecules after emulsification all run into the ink, occupying

the space between its original molecules, the volume of the ink will increase;

Similarly, because water molecules occupy the space of the ink, the proportion of

the area occupied by pigment particles on the ink surface is reduced. Because

the pigment reflects the colored light in the air, so we can see the color of the ink,

so the less pigment particles, the less light the ink can reflect, which destroys

the hue, brightness and saturation of the ink; When water seeps into the ink,

its viscosity will also decrease.

What's wrong with printing with emulsified ink?UV ink problems that must be

understood in printing.In fact, once the ink is emulsified, its hue, brightness and

saturation will be damaged due to the penetration of water molecules. Therefore,

printing with these inks will inevitably lead to the problem of color shift. As

the saturation of the ink decreases, the amount of ink has to be increased during

printing, which will bring another problem of increasing the field density value.