Direct printing on materials with inherently smooth surfaces, such as films, foams, and aluminum foils, can face challenges, including unclear prints and susceptibility to color fading. However, the application of corona treatment can significantly enhance the surface adhesion properties of these materials. This advanced treatment process increases the surface's affinity for printing inks, ensuring a more robust and lasting bond."

Water-based inks have a relatively high surface tension, making it difficult to evenly cover the surface of the print material during the printing process. This leads to problems such as uneven ink, dotting, or non-adhesion, affecting the quality and appearance of the printed product. Corona treatment addresses these issues by generating a high-energy plasma field through high voltage. Plasma field induces both physical and chemical alterations on the material's surface, increasing its surface energy and improving wettability. The outcome is a marked improvement in print quality, with even ink distribution, minimized ink migration, and reduced blurring, ultimately enhancing both the quality and the aesthetic of the printed item.