Print halo classic 9 improvement program

[China Packaging Network News] First, the printing halo classification and formation reasons

1. There is a halo around the entire printed pattern

There is a halo around the entire printed pattern, usually caused by too much pressure between the print cylinder and the corrugated cardboard, which causes the print plate to distort during the extrusion process, which is caused by a large printing pressure.

2. There is a halo on the front edge of the blot

The halo around the front edge of the print is usually caused by the pressure exerted by the press anilox roller between the print cylinder and the corrugated cardboard on the plate. That is to say, the plate pressure is too large, or the printing plate is not tight, causing halo.

3. All printing patterns have halo

Generally, the printing plate is not horizontal, worn, bent, and dirt is caused on the surface when it is printed. This causes uneven thickness of the ink layer and thick ink layer to cause halos. The same printing plate can also cause halo phenomenon. Such as the rubber plate is more likely to produce halo because of the relatively high hardness of the printing plate.

Second, halo improvement proposal classic 9

How to improve after printing halo appears? You can start from the following 9 points:

1. Pay attention to the gap between the anilox roller and the print cylinder to reduce the pressure.

2. Pay attention to the distance between the print cylinder and the impression cylinder to reduce the pressure.

3. Use a thinner material to pad the plate to maintain the proper thickness.

4. Reinstall the plate so that it is tightly attached to the roller.

5. Adjust and reduce the pressure of the anilox roller, check the level of the printing plate and typesetting situation.

6. Level the plate, fill its pits, remove dirt, or replace plates.

7. Adjust the pressure of the squeegee device, cardboard and anilox roller so that the rollers are parallel and change the plate.

8. Reduce the thickness of the ink layer by the following method.

9. Reduce the ink concentration and use a softer plate generally controlled at about 35 degrees.