Varnish Coating
A security feature consisting of two varnishes: matt and glossy. Images (texts) are printed by glossy varnish over matt varnish and are visualized, when the banknote is tilted due to the contrast of the varnishes. (fig. 1, b).
a
b
Fig. 1. Fragment of the front side of the banknote with Securicoat. 50 Nigerian Naira (2010):
a – at right angles; b – at an acute angle