Method for printing 3D micro-optical image on packaging system

摘要

The present invention relates to a method of printing a 3D micro-optical image on a packaging system in an in-line process, the method comprising providing a substrate and a plurality of images on at least a portion of a first major surface of the substrate. A printing step, a step of applying a transparent varnish layer on the printed first major surface of the substrate, and a step of forming a plurality of relief features on the outer surface of the varnish layer, the relief feature comprising: The part is a microlens.