What is the function of UV varnish coating?After the UV flatbed inkjet printer prints the color pattern, in order to achieve a special highlight effect or extend the shelf life of the pattern, varnish is needed. Varnish is a special post-printing process. It has decorative prints, smooth the surface of printed items, prevent patterns from fading, provide a protective layer to protect items, and improve the applicability of waterproof, weather resistance, and scratch resistance. You can use the uv flatbed printer nozzle for spraying, or you can use a special spray gun or shower coater for spraying.