Common troubles in printing plates and solutions

1. The blank part of the printing plate is the cause of the plugging failure and the processing method:

 1 Back exposure time is too long. Care should be taken to properly control the back exposure time: 2 The main exposure is excessive. Under the premise of ensuring the reproduction of small texts and thin lines, the main exposure time should be shortened as much as possible: 3 The contact between the plate and the film is poor. The vacuum system should be ensured to work normally, and rollers should be used to drive off the air between the plate and the film.

2. Small outlets, small prints, thin lines are washed out.

 1 back exposure time is not enough. Consider increasing the back exposure time: 2 main exposure time is not enough. Can increase the main exposure time; 3 wash plate time is too long or brush pressure is too large. Pay attention to shorten the washing time and adjust the brush pressure.

3. The reason why the bottom of the plate is not completely hardened and its treatment method:

Insufficient exposure on 1 back. Increase the back exposure time; 2 flushing is not complete, there is residual unhardened resin retention. Check the brush pressure and adjust the wash time.

4. The reason for the inconsistency in the depth of the same printing plate is as follows:

 1 printing machine is too hot. Carefully inspect the ventilation and cooling system for any malfunctions; 2 The intensity of the typography lamp is uneven or the opening is not synchronized. At the same time, replace all the lamps; 3 washing brush is not parallel or the action is not balanced. Adjustable brush pressure and leveling.

 5, the image part is blurred and the cause of the fault and the treatment method:

1 film is defective. Carefully check that the image on the film is clear; 2 wrongly use offset film for flexo printing. Reproduce qualified flexo film.

6. The reason for the loss of small outlets during printing and its handling methods:

 1 There is not enough main or back exposure. Can increase the main exposure or back exposure time; 2 original design beyond the flexographic reproduction capabilities. Improve manuscript design to suit flexographic technology.

7, Causes and Troubleshooting of Rupture Caused by Moving and Curving After Field and Text Making

 1 The main exposure and back exposure time is too long. Can reduce the main exposure and back exposure time; 2 removal of sticky time is too long. Reduce the removal time; 3 main exposure and underexposure. Check the lamp for damage or deterioration.

8. The reason why the thin lines are curved and wavy and the treatment methods are as follows:

 1 Back underexposure. To increase the back exposure time: 2 The main exposure is insufficient. To increase the main exposure time; 3 lack of drying time. To increase the drying time: 4 wash plate water is not fresh. Replace fresh wash water; 5 wash time is too long. Adjust the wash time.