Technologies

Chemical Sciences, Physical Sciences

Title:	Anticopier Colour Shift Protein Film for High Security Applications
Area:	Chemical Sciences, Physical Sciences
Focus Area:	Security feature Holograms
Social Benefits:	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.
Developing Agency:	CSIR-Institute of Microbial Technology (IMT), Chandigarh
Technology Readiness Index:	Prototype
Email:	director@imtech.res.in
Website Link :	http://www.imtech.res.in
Source (more info) :	https://t.ly/l_sb

Brief Description

Description :

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.