IR-fluorescent Ink
An ink, containing fluorescent substances (pigments) which glow white when exposed to visible infrared (green) light (wavelength is 400–530 nm). It may be coloured of coloureless. The pigments are not visible under normal daylight; can be detected by special devices (fig. 1).
Fig. 1. IR fluorescence of images, banknote denominations and security fibers.
5 000 Serbian Dinars (2010).
Images of IR fluorescence of banknotes are available in the Forensic version of the Database