Hidden Multi-colour (HMC) Image
An image made by colorless embossing over a printed area on the banknote. When the banknote is tilted, the image appears on the one-coloured area of the banknote. Each character of the image has its own colour. When the banknote is rotated without changing the angle of view, each character changes its colour (fig. 1).When the banknote is tilted under UV light, the image may appear on the one-coloured area of the banknote. Each character of the value numeral has its own colour. When the banknote is rotated without changing the angle of view, each character changes its colour (fig. 2).

a

b

c
Fig. 1. Hidden Multi Coloured image under white light. 500 Russian Rubles (1997). Modification 2010:
a – view at right angles; b – view of the tilted banknote; c – view of the tilted and rotated banknote

a

b

c
Fig. 2. Hidden Multi Coloured image under UV light. 500 Russian Rubles (1997). Modification 2010:
a – view at right angles; b – view of the tilted banknote; c – view of the tilted and rotated banknote