Hot Stamping Foil for Water-Based Varnished Paper
Water-based varnish is widely used on paper boxes to improve surface protection and visual finish. It can make packaging feel cleaner and more durable, but it can also change how hot stamping foil bonds to the surface. ## Why Varnished Paper Needs Testing A foil that performs well on uncoated paper may behave differently on a varnished sheet. The varnish layer changes smoothness, surface energy and contact behavior. Some varnished papers stamp cleanly, while others show weak adhesion, dull metallic effect or incomplete transfer. The key is to test the actual varnished sheet, not just the b…