Corrugated board ink flexo printing common troubleshooting
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Flexographic printing corrugated cardboard is becoming more widespread in packaging printing. Water-based ink is one of the most commonly used environmentally friendly inks. The printing suitability of the team corrugated board is also relatively good, so the application in corrugated board printing has also increased significantly. However, the flatness of the corrugated board is not good and requires high printing pressure. The flexographic printing is called kiss printing. The printing pressure is very strict. In addition, the water-based ink itself has a slow drying and precipitation after long-term storage. The characteristics of the paper, as well as the smoothness, elasticity, water content and surface acceptability of the paper surface, make the corrugated board flexographic water-based ink printing technically more difficult than ordinary paper printing.
We know that the key factors affecting the quality of printed products are equipment, raw materials, people and the environment, as well as corrugated board printing. Therefore, to ensure the quality of printing, it is necessary to ensure that the raw materials are qualified, the equipment is operating normally, the environment meets the requirements, the operator's technical level is high, and the production practice experience is rich.
According to the production practice and the experience of some experts, to ensure the quality of corrugated cardboard water-based ink flexo printing, pay special attention to the following points:
1. Pay attention to the clarity of the printed graphics;
2. To ensure that the printing color is pure, the batch products have no color difference;
3. The same batch of printing should keep the ink color consistent;
4. When printing and coating the whiteboard carton, be careful not to have a ghost image;
5. Ensure the accuracy of overprinting of each color;
6. Pay attention to the impact of carton strength on full-page printing;
7. For the missing version, it should be printed in time;
8. Pay attention to the printing of thin cardboard;
9. For warping cardboard, it is necessary to prevent running plates and slots;
10. The flexo covers the printing, pay attention to cover the background color;
11. Pay attention to observation during printing, and problems should be eliminated in time.
In addition, pay attention to the elimination of some faults in printing. Due to the many factors affecting the quality of the direct printing corrugated board of the water-based ink flexo plate, it is easy to cause printing problems and bring quality problems. Therefore, in the case of troubleshooting, it is necessary to observe and analyze according to the characteristics of equipment, materials, water-based inks, etc., and to eliminate the prescriptions.