Analysis of common failures in printing ink printing - missing or missing dots

Fifth, the network is missing or missing

Under normal circumstances, the cause of the failure is: First, the viscosity of the ink is too high; Second, the ink film drying too fast; Third, there are particles in the ink; Fourth, the poor leveling of the ink; Fifth, the lack of printing pressure; Plate sleeve circumference is not smooth, not clean and so on.

Treatment method: First, the ink viscosity should be adjusted between 25 ~ 30S/25 °C · 4 cups between the coating is appropriate; Second, the ink is added in the printing when the slow-drying thinner; third is to prevent the ink from drying prematurely in the plate version of the hole (Add wetting agent); Fourth, add 1% to 3% leveling (such as ether) or adjust the pressure, so that the substrate tension control is appropriate at 0.05; Fifth, replace the printing plate or grinding India Edition surface.

Failure (1) (2) (3) (4) (5) (6) (7) (8) (9) (10) (11)