What are the factors that affect the ink saturation of screen printers?

What are the factors that affect the ink saturation of screen printers?

Whether it is in contact with screen printers in life or at work, it has become an indispensable part of human life. It is a large-scale printing equipment, and the screen printing machine is a machine for printing text and images, which is a kind of printing machine. Screen printing consists of five major elements, screen printing plates, squeegees, inks, printing stations, and substrates. So what are the factors that affect the ink saturation of screen printing machines? The following staff from Dongguan Lichao manufacturers introduce to you:

Ink

When all are produced with old inks, similar problems are likely to occur. The old ink is mainly stored for a long time. If the seal is not paid attention, there may be oxidation of the ink, the solvent in the ink volatilizes, absorbs the moisture in the air, the resin and the pigment in the ink are relatively reduced, and the gloss of the ink is lowered.

2. Viscosity value

The viscosity of the ink should be controlled within the appropriate range, which means that the viscosity must be proportional to your speed and solvent drying rate. The printing machine we are using now is a high-speed printing machine. During high-speed operation, the evaporation rate of the solvent is relatively fast, and the viscosity of the ink is required to be relatively low.

3. Imprint roller

It is important to choose the right pressure roller. The spot color layout is large, and the transfer rate of the ink on the plate roll is relatively high. If the emboss roll with relatively high hardness is selected, the ink can not be well wetted on the entire plate during transfer, which will reduce the ink. Transfer rate to the printed substrate.

4. Scraper angle

It is not suitable to make a special color plate scraper. It can be softer. The distance between the scraper and the platen roller can be relatively far. The angle of the scraper should be produced at an angle of 45-50 degrees. It should not be too flat or too steep! This can take into account the problem of ink and dry plate.

5. Raw materials

Before the film of the raw material is printed, the corona strength value must be checked. If the ink is too low, the ink cannot be fully transferred. Especially in the case of shallow screen printing, there will be a quality problem of poor transfer like plugging. This problem is mainly caused by the surface of the film. The corona impact strength is not good, the surface of the film does not form a rough surface, the surface tension of the material can be greater than the surface tension energy of the ink, the ink cannot form an effective adhesion on the film, and the ink cannot be sufficiently transferred, so that the ink cannot be rendered. Out of effect.

The above factors affecting the ink saturation of the screen printing machine are introduced here. In the printing, the ink plays an important role, so it is more important to correctly select and use the screen printing ink.