Anticopier Colour Shift Protein Film for High Security Applications

We have developed the anticopier and difficult to imitate colour shift Laminated protein film. The environmental friendly Biodegradable, non toxic, Microbial protein ink was deposited on Lamination temperature resistance porous membrane forms a stable thin protein film which will not tear easily.

Due to the advanced technologies in printing, scanning and communication devices, counterfeiters still able to make fake currency notes and counterfeit the original documents.  Branded products  were also duplicated by the counterfeiters using advanced colour copier machines. Existing colour shift inks, optically variable inks contains toxic organic, inorganic chemicals and pigments uses optical reflective effects to show the colour change when tilted at certain angle or exposed to UV detectors.  In our lab we developed the anticopier and difficult to imitate colour shift Laminated protein film. The environmental friendly Biodegradable, non toxic, Microbial protein ink was deposited on Lamination temperature resistance porous membrane forms a stable thin protein film which will not tear easily. The laminated protein film shows reversible colour change from purple to yellow under illumination and  yellow to  purple under non-illumination condition with in few seconds.

This reversible colour change under   Illumination can be triggered by using Handy torch light , Handy green laser pointers, Handy Mobile phone flash light and also under normal sunlight. The reversible colour change from purple to yellow and yellow to purple was identified by naked eye  without using external reader instruments. This Laminated protein film with reversible colour changing property can be used in developing high security  feature Holograms.