1. The adjustment of printing pressure is critical. It includes the pressure between the printing plate and the substrate and the pressure between the anilox roller and the printing plate. If the ink viscosity is too high and the ink dries too quickly, the solution is to adjust the pressure, dilute the ink, and add a slow drying agent.
2. The ink dries on the printing plate. If the printing edge is blurred, it may be that hot air is blowing on the printing plate. The paper fiber is mixed with the ink to cause static reaction. The elimination method is to dilute the ink and gradually increase the speed, cover the ink system, or replace the ink 3. Install anti-static device.
3. Flexo is especially suitable for printing on the spot. If the spot is not solid, the cause may be that the viscosity of the ink is too low and the surface of the substrate is uneven. The response method is to use ink with high viscosity and use printing materials with good surface quality.
4. The ink is accumulated on the printing plate or the dots are full. The reasons include too much ink, too much printing pressure, too fast drying ink or too weak ink, the solution is to replace the anilox roller, adjust the pressure, add slow drying Agent or use high color and strong ink.
5. The reason for poor printing adhesion is that the drying temperature of the ink is too low, the ink has no affinity with the material, and the dyne value of the surface of the material is too low. Corona treatment is required. The solution is to measure the surface tension, increase the drying temperature, replace the ink type or Brush the surface of the printing material.
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