News & Knowhow

Reasons for chattermarks Chattermarks occur diagonally to the web running direction. Chattermarks are often a problem of worn bearings or gears, especially when the stripes are in line with the drive system. Other reasons may be the ink system, inclu...

A tiresome issue in flexo printing is the spraying of ink over the anilox roller onto the respective substrate. Colloquially this problem is also called "ink splashing". This printing error occurs particularly frequent when processing UV ink, which h...

The paint collects around the closing doctor blade and its surroundings. Due to its design, the doctor blade is subjected to dynamic pressure because the lamella surface lies within the chamber and bends inwards. If the doctor blade is too stiff, or ...

The main reason for squeezed edges is too much pressure of the printing plate onto the anilox roller and the substrate. This results in the flexible image carrier squeezing the screen dot to be printed onto the substrate and creating a squeezed edge ...

Surface damage to the anilox roller is caused by foreign particles being ground in. These particles cause scoring in the anilox roller. Since flexo printing does not use doctor blade oscillation, unlike gravure printing, foreign particles have the po...

Tone value increase is a printing error between the master and the printout. This results in a darker and sometimes blurred image. The reasons can be many and varied, for example the pressure of the printing plate on the substrate, as well as an inco...

The paint collects around the closing doctor blade and its surroundings. Due to its design, the doctor blade is subjected to dynamic pressure because the lamella surface lies within the chamber and bends inwards. If the doctor blade is too stiff, or ...