  We analyse the dewetting of printing plates for gravure printing with
well-defined gravure cells. The printing plates were mounted on a rotating
horizontal cylinder that is half immersed in an aqueous solution of the anionic
surfactant sodium 1-decanesulfonate. The gravure plates and the presence of
surfactants serve as one example of a real-world dewetting situation. When
rotating the cylinder, a liquid meniscus was partially drawn out of the liquid
forming a dynamic contact angle at the contact line. The dynamic contact angle
is decreased on a structured surface as compared to a smooth one. This is due
to contact line pinning at the borders of the gravure cells. Additionally,
surfactants tend to decrease the dynamic receding contact angle. We consider
the interplay between these two effects. We compare the height differences of
the meniscus on the structured and unstructured area as function of dewetting
speeds. The height difference increases with increasing dewetting speed. With
increasing size of the gravure cells this height difference and the induced
changes in the dynamic contact angle increased. By adding surfactant, the
height difference and the changes in the contact angle for the same surface
decreased. We further note that although the liquid dewets the printing plates
some liquid is always left in the gravure cell. At high enough surfactant
concentrations or high enough dewetting speed, the dynamic contact angles in
the structured surface approach those in flat surfaces. We conclude that
surfactant reduces the influence of surface structure on dynamic dewetting.
