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.
Institute of Microbial Technology (IMTECH)
Acces sibility Controls