Screen printing mesh screen printing inks will inevitably have problems in the process of using, this time you need a professional solution. Hebei Maishi professional and technical personnel told the following solutions to the problem:
1, blocking: the reasons are too fast drying, printing speed is too slow, printing viscosity is too high, poor use and improper thinner,
The printing position is subject to wind, ink fineness or impurities. The drying speed should be adjusted as appropriate or the ink should be replaced.
2, pinhole: the reason is that the substrate is too smooth, the printing surface is grease or with impurities, the ink itself is bad, so it must
Pre-press treatment of the surface of the substrate, addition of leveling agent or replacement of good ink.
3, foaming: the reason is that the printing viscosity is too high, too fast drying, the plate and the substrate are too fast, the layout is poor, the ink
If you have problems, etc., you can take appropriate measures to adjust according to the above reasons, or add appropriate amount of defoamer and more.
Change the ink.
4, poor adhesion: the reason is improper ink selection, pre-press processing is not enough, the substrate has impurities, drying temperature
Insufficient degree and time, improper use of additives, curing agents and driers, and solid color of two-component inks when printed in color
Hard and so on.
Because PE, PP, PET, aluminum foil and other materials have relatively low chemical polarity or are too smooth, they are generally carried out.
EDM, flame, strong acid immersion and the like to improve the surface tension of the printing surface. After the ink film of the two-component ink is cured,
Due to the chemical reaction, the ink film is cross-linked into a dense film, and the fully cured ink film is difficult to be etched by the solvent.
Therefore, when the color is printed, the background color can be printed after drying, and other factors can be adjusted by corresponding methods.
5, screen printing mesh wire drawing: the reason is that the viscosity is too high, too fast drying, the resin used in the ink and the solvent is not properly matched. Should be used properly
Solvent, adjust the proper viscosity or replace the good ink.
6, whitish or printed surface is foggy: the reason is that the diluent contains moisture, the printing environment air temperature is high, or printing
The ink itself is bad.
When the printing surface is dry, the solvent volatilizes to absorb the surrounding heat, causing local water vapor to solidify in the ink film or surface.
Causes white atomization, so choose the appropriate drying speed or reduce the space temperature, or replace the good ink.
The above is the screen printing mesh ink to solve the problem, do not be nervous and panic if there is a problem, as long as the correct solution is taken. I hope that everyone will have a profit after reading.
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