Several major factors that affect printing quality cannot be ignored!

Main factors affecting printing quality

1. Block version. Clogged dots will cause the amount of ink transfer to decrease, and the color of the printed matter will change. When blocking occurs, the printing plate should be cleaned with solvent or special cleaning agent, and corresponding measures should be taken according to the cause of blocking.

2. The printing plate is worn. Abrasion of the printing plate will make the dots smaller and lighter, which affects the ink carrying capacity of the dots. The result of abrasion of the printing plate is that the color generally fades. Sometimes the abrasion of the white plate makes the amount of ink on the white ink insufficient, and the coverage of the base color of the substrate is insufficient. At this time, the plate should be shut down for production, and the old version should be re-plated. If the printing plate cylinder collapses due to the transitional mesh wall and cannot be re-plated, the plate must be re-made.

3. Pattern colors are inconsistent. When multiple patterns are arranged in the horizontal direction at the same time, the color of the patterns on the left and right ends of the printing plate may be inconsistent. During the plate-making process, especially when the full plate is on the ground, the electric engraving is easy to change the dot size from left to right. Therefore, you should pay attention to check the difference in printing effect between the left and right ends of the plate cylinder.

4. The rationality of the printing plate design. When designing the printing plate, we must fully consider the influence of the design of the printing plate on the printing process and post-press processing. For example, the color of the 80% and 5% of the dot jump area is very easy to be graded and graded, and changes should be taken in advance.

5. Printing environmental factors. If the room temperature of the printing workshop changes significantly, the flow state of the ink will change. The temperature and temperature of the general production workshop are controlled at a temperature of (23 ± 5) degrees Celsius, and the humidity is 60% ± 5%. In addition, when using ink in winter, it is necessary to preheat in advance to increase the fluidity of the ink.

6. Printing conditions. When the layout is subjected to irregular wind, the printing speed and drying speed will change, which will cause the color of the printed matter to change. The above factors should be fully considered in the printing process.