Pearlescent plastic gravure ink common problems and solutions

one. Pearlescent effect is poor or no pearl effect

1. Check if the outlets of the printing plate are clogged. If necessary, clean the printing plate outlets.
2. Check whether the outlets of the printing plate are too shallow to achieve the required effect.
3, check the blade angle is too large or too high pressure.
4, check whether the ink dry speed is too fast, there is a dry version of the phenomenon, if this phenomenon occurs, it should be properly filled with slow-drying thinner.

two. Uneven distribution of pearl powder printing

1, poor ink diffusion, solvent failure, resulting in poor ink solubility.
2, the viscosity of the ink is too high, not uniform coating, transfer to the layout after the uneven phenomenon, at this time should consider adding thinner.
3, press pressure roller uneven pressure, should adjust the pressure on both sides of the pressure roller consistent.
4, should eliminate static electricity in time, generally take the grounding device.
5. Stir slowly to prevent precipitation of pearlescent ink.

Third, there is pearl effect but no luster

1. The diluent volatilization rate is not balanced and appropriate diluents should be used.
2, speed up the printing speed.
3. Reduce the amount of thinner when printing.

Fourth, paste version, blocking version

1, the ink drying too fast, should adjust the appropriate drying speed.
2. Impurities are mixed in. Pay attention to the surrounding environment when printing.
3, improve the printing speed. Reduce dry time.
4, reduce the scraper and pressure roller distance.

Fifth, the strength of stripping force after composite printing

1, the correct choice of pearl ink model, performance and use, determine the printing or printing.
2. Select the appropriate glue and thinner.
3, control the compound when the amount of glue, temperature, tension and so on.
4, master the corona treatment of the film.

Author: Yin Xueying

Manual Pad Printer

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