Flexography is currently one of the most common printing techniques when it comes to printingof packaging. It is a high printing technique that uses flexible printing forms which allow the reproduction of prints on different types of material. The imprint is created by using tiny elements called raster points. In the process of preparation and printing there are many factors that can disrupt the harmony and shape of the raster elements, and thus the quality of the imprint. Some of them are:inadequately performed preparation, badly madeprinting forms, problems during machine preparation (anilox roller, doctor blade, pressure...), poor quality of paint or material. This research deals with the anomalies of the raster elements that appear during the printing of labels in flexography. The main question is how to avoid changes of the shape of raster elements and thereby increase the imprint quality. Sometimes thoseare just minor corrections on the machine while some mistakes can be eliminated only by correcting the preparation and by creation of new printing forms. Such corrections create additional costs that lead to new questions. How many anomalies of raster elements are actually visible to the naked eye and do the customers notice them? The aim of the paper is to investigate the mistakes of raster elements and theway how they can be corrected. Based on the examples will be defined the visibility of these mentioned deformations and how much they actually affect the end product quality.