We invented Rainbow Fibres™. This range of multi-colour and multi-effect fibres is one of the most innovative developments in security fibres used in banknotes
The small size of the fibre, combined with the variety of fluorescent colours in precise register, makes it difficult to counterfeit.
Four-colour Rainbow Fibres™ are completely invisible in normal light but under ultra-violet light, they fluoresce in four different colours along the length of the fibre. We can combine dual-fluorescence, so that colours are different under long-wave and short-wave fluorescence
The ‘rainbow’ appearance of the fibres makes it easy to describe and easy for the observer to identify. If the bands are visible as well as fluorescent the fibres can also be a semi-public security feature.