March 10, 2020 8:39 PM
Discovery of Ink to Curb Fake Printing of Passports and Counterfeiting of Currency Notes
<span style="color: #333333;">CSIR-National Physical Laboratory has developed a bi-luminescent security ink which glows in red and green colours when illuminated by two different excitation sources at 254 nano meters (nm) and 365 nm, respectively. </span><br />'' <br />'' <span style="color: #333333;">The ink was prepared in a batch of 1kg and given to Bank Note Press (BNP), Dewas, a unit of Security Printing Minting Corporation of India Ltd. (SP...