Varnish Coating
A transparent 20-40 µm thick film which is invisible to the naked eye at a right angle. It protects the substrate from getting wet and prevents ink erasure. Varnish coating is visualized as a coating with slight gloss visible at an acute angle. It is applied over a printed image or creates an independent colorless image.
a
b
Fig. 1. Belgium. Vehicle registration certificate:
а — outside spread of a booklet; b — varnish right-angled coating covering the right part of the number «714980» applied by letterpress