Security Ink Based on Nano-materials to Combat Counterfeiting
Recently, Indian scientists have developed a highly stable and non-toxic security ink from nano-materials that spontaneously emit light (luminescent) due to its unique chemical properties to combat counterfeiting of various types.
Existing Method to Combat Counterfeiting
- Luminescent Ink: Luminescent ink is generally used as covert tags to combat the counterfeiting.
- Downshifting: Most of the security inks available today are based on luminescent materials that absorb a high energy photon and emit low energy photon, technically called downshifting, where covert tag is invisible under daylight, and it becomes visible under UV light.
- Prone to Replication: These single emission-based tags are ....
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