Screen printing ink in the use of what problems?

Screen printing ink in the use of what problems? In the use of daily life, silk screen inks what problems?

1. Foam

The reason is the printing viscosity is too high, too fast, the plate and the substrate has been too fast, bad layout, the ink itself has caused the problem and other factors, can take appropriate measures to adjust, or add appropriate defoamers and replace the ink.

2. blocking version

The reason is too fast drying, printing speed is too slow, the printing viscosity is too high, the use of poor and improper diluent, printing layout by the wind, ink fineness or impurity caused by impurities. Should be properly adjusted drying speed, or replace the ink.

3. pinhole

The reason is that the printed body is too smooth, the printing surface has a protective layer of grease or impurities, and the ink itself is not good. Therefore, it is necessary to pretreat the surface of the printed object, add a leveling agent or replace a good ink.

4. bad adhesion

The reason is improper choice of ink, pre-treatment is not sufficient; substrate debris, lack of drying time; additives, curing agent, drier dosage is not appropriate, two-component ink color printing, the background hardening and so on Caused by factors

As the chemical polarity of PE, PP, PET, aluminum foil and other materials is very low or too smooth, it is generally carried out by EDM, flame, acid soaked in order to improve the surface tension of the printing surface. Two-component ink ink film curing, due to the chemical reaction, cross-linked into a special ultra-dense ink film, fully cured ink film is difficult to be eroded by the solvent, so multi-color printing, You can print, other factors can be adjusted accordingly.

5 drawing

The reason is the viscosity is too high, too fast, the ink used in the resin and solvent caused by improper, should use a suitable solvent, adjust the appropriate viscosity or replace the good ink.

6.Migration, fading

The reason is the use of improper ink in the ink, especially with a large number of plasticizer soft film, more prone to migration, should use the appropriate ink.

7. White or printed surface fog

The reason is that the diluent contains moisture, humidity in the printing environment is high, or the printing ink itself is not good. As the printing surface is dry, solvent evaporation will absorb the surrounding heat, resulting in local water vapor solidified in the ink film or surface white fog, so you should choose the appropriate drying speed or reduce the space humidity, or replace the good ink.