*Inkjet Printing of Functional Inks for Smart Products DOI: http://dx.doi.org/10.5772/intechopen.104529*

coating with hydrophilic moieties (such as PVP and PVA solutions) [97, 98], plasma activation [98–100], mechanical abrasion, or superficial integration of nanoparticles or nanoclays [101], which increase surface roughness. Plasma activation is usually done by resorting to corona discharge plasma treatment and relies on the production of a high voltage electrical discharge that ionizes the molecules of the treated surface, positively changing its polarity (or oxidizing it) [99, 102, 103].
