Intaglio Contrast Effect (ICE)
ICE – Intaglio Contrast Effect
An image printed with special inks by intaglio over the metal coated area of the polymer banknote. The element has an optically variable colour effect: the colours of the image become more contrasting when looking at the banknote at a very sharp angle (fig. 1).
a
b
Fig. 1. Intaglio contrast effect (ICE). 100 Brunei Dollars (2004):
a – view at right angles; b – view at a sharp angle