Researchers at India’s Ministry of Science and Technology’s National Institute of Physics (CSIR-NPL) have developed a new security ink that encrypts and protects sensitive data contained in documents such as passports.scientific journalnature indiareported on April 25.Research results published in academic journalsnano micro smallPublished in
Existing security inks are unstable, lose their ability to emit light over time, and are mostly made from toxic substances. So a research team led by Bipin Kumar Gupta combined a variety of luminescent materials with specific magnetic nanoparticles to synthesize a safe and effective security ink.
Items printed with the newly developed security ink usually look only golden, but when exposed to ultraviolet light, they emit red and green light, and when exposed to a laser, they emit blue light. The magnetic nanoparticles in the ink also have magnetic character recognition capabilities, so confidential and personal data contained in documents such as passports and bank checks can be encrypted and protected.
The researchers also used this ink to develop a special QR code that is colorless under visible light, but can scan data under ultraviolet and laser light. In the future, this ink is also being considered for use in other fields, such as military equipment and pharmaceuticals, to curb fraudulent activities.
Science Portal Asia Pacific Editorial Department