Cold Foil Inline Vision Registration Calibration across Shift Operations
Cold foil inline vision systems maintain registration across shifts by matching strobe sensor geometry to substrate thermal growth and adhesive rheology changes.
Spot Varnish Inline Foil
Decorative Application
The process of applying a localized adhesive and a metallic film in a single pass on a printing press creates a high quality visual finish. Using spot varnish inline foil allows for the addition of metallic effects to specific areas of the packaging without the need for a separate stamping operation. The varnish acts as a glue that pulls the foil from its carrier sheet only where the image is printed.
This method provides a faster and more efficient way to produce premium boxes.
Adhesive Mechanism
The strength of the bond depends on the curing time of the varnish and the pressure of the application roller. In a spot varnish inline foil setup, ultraviolet light often dries the adhesive instantly to lock the metal in place. This technique allows for finer detail and thinner lines than traditional hot foil stamping.
Aesthetic Finish
The final look is characterized by a smooth and brilliant surface that resists rubbing and scratching. Choosing a spot varnish inline foil over other methods reduces the energy consumption and tooling costs associated with metal dies. It provides a flexible way to add security features or branding elements to the exterior of the carton.