If surfaces must be painted, printed or glued, they need good wettability of the surface to get a good bond. Many surfaces even in a clean state show insufficient wettability exacerbated by impurities. As a result, liquids such as adhesives and inks fall off. This is because the surface tension is very low and insufficient for further treatment. If untreated materials are treated, the result is that paints and varnishes often fail to adhere completely and quickly become loose again, or the bonded parts fall apart. This can be prevented by plasma activation. Plasma activation of the surface increases its surface energy and produces molecular groups associated with the liquid. This emerges through improved wettability and leads to optimal adhesion of the appropriate liquid.
