engleski

The influence of the structure of the offset rubber on the screen reproduction

During the indirect printing process, the rubber offset blanket has the function to transfer the ink from the printing form on the paper. The tiny printing elements of the dotted shape with the size between 20 and 250 μ m (screen dots) are reproduced on prints. In this process, the positive deformation of the screen elements appear inevitably, which is in direct dependence on the hardness and the composition of the compressible rubber blanket. In this work it is analyzed how the rubber composition and its compressibility influence the reproduction of the screen elements, and how great is its influence in the total deformation of the screen elements. The shape of the reproduced screen elements, i.e. the circularity of the dots has also been monitored. All four printing units as well as their reproduction of the basic process inks have been tested in the work.

Offset printing ; impressible rubber blanket ; deformation of the screen elements ; circularity

nije evidentirano