Factors that influence
Missing dots are most common in gravure printing. The causes vary; some are related to the paper topography, such as the paper surface being too coarse, inadequate contact between substrate surface and ink cylinder, or an electrostatic charge that causes cells to not empty properly. Other examples are uneven fibre and filler distribution, insufficient ink absorbency, and factors not directly related to the paper, such as the use of a printing press or ink that is not optimised for the task at hand. Evidently, a thorough investigation is necessary to come to terms with the problem of missing dots.
Avoid costly downtime
There are different methods of measuring and managing missing dots. Solving the problem will save you both time and money and reduce the need for print trials. Actions to take may include cleaning of the ink head, electrostatic printing assistance (ESA), or reducing the screen width/resolution. Whatever is needed for your particular problem, we have the experience, software and tools to help you measure, predict missing dots, and avoid costly repairs and downtime. For more information and help in finding efficient solutions to your missing dots problem, please contact Holmen Paper’s technical specialists.