Shiv Nadar Univ experts develop ‘invisible’ security ink

HT Image
HT Image
Published on Mar 01, 2020 11:33 PM IST
Copy Link

LUCKNOW Shiv Nadar University on Sunday announced that its research team has created a unique ‘security ink’. This ink is not visible under normal lighting conditions, but the inked data can be seen when placed under ultraviolet (UV) light sources.

The research team comprising Debdas Ray, associate professor, and his doctoral student, Harsh Bhatia, from the department of chemistry has used organic compounds, which are environment friendly, low in toxicity and not harmful to the human body, to develop this ink.

“An intriguing result observed in our chemistry research laboratory has led to this useful, quality invention, and I would like to congratulate our research team for their work. Security ink market is expected to grow at roughly 8.3% over the next five years owing to rise in forgery and counterfeiting activities, to reach US$ 1.3 billion in 2024, up from US$ 941.8 million in 2019. This indigenous research may give us an edge,” said Rupamanjari Ghosh, vice-chancellor, Shiv Nadar University, UP.

The ink is made with the help of a commercially available polymer known as polyvinyl alcohol, dissolved in an organic solvent, either tetrahydrofuran or ethanol. After writing the characters with this ink, the paper is allowed to dry in ambient conditions for four hours, and afterwards it can be used for intended applications, Ghosh said.

This security ink phenomenon incorporates the elements of both fluorescence (emission of light immediately after light exposure) and phosphorescence (in which the absorbed radiation is re-emitted on a slightly longer timescale). When the UV light is switched on, the characters become visible in a white background due to the involvement of both fluorescence and phosphorescence and as soon as the light is switched off, the characters remain visible in a different colour only for a fraction of a second, due to phosphorescence, vice chancellor added.

The ink by virtue of its chemical composition can alter its emission abilities under specific light conditions, thereby giving it the ability to provide additional layers of security to enhance its anti-counterfeit capabilities.

Thus, it can provide a higher degree of safety and authenticity to a host of government documents (stamp papers, passports, cheques, etc), currency, private classified documents as well as night-vision products used by private and government agencies, she said.

Close Story

Less time to read?

Try Quickreads

  • Union Minister for Women & Child Development and BJP leader Smriti Irani addresses party workers during the party's 'Tridev Sammelan', at Kangra’s Chambi ground, on Friday. (PTI)

    Kangra ‘Tridev Sammelan’: Lotus will bloom again in Himachal, says Smriti Irani

    Union minister for women and child development Smriti Irani on Friday made a scathing attack on Congress and its leader Rahul Gandhi. Irani addressed the party's “Trident Sammelan” at the Kangra's Chambi ground. She castigated the Congress and accused it of hampering the development of the state. Irani described the Atal tunnel in Rohtang as a gift of Prime Minister Narendra Modi to Himachal Pradesh. She said the BJP broke the precedence set by the Congress regime.

  • A countrymade pistol and three live cartridges were recovered from the gang of robbers arrested in Ludhiana. (Representative image)

    Ludhiana: Gang of robbers busted with arrest of seven

    The CIA staff of Ludhiana police have solved two cases - a carjacking at Alamgir Road on April 8 and a robbery attempt at a finance company on April 16, with the arrest of seven members of a gang. SSP of Ludhiana rural, Deepak Hilori, said that a countrymade pistol and three live cartridges were recovered from Harpreet's possession.

  • The permanent lok adalat had, on December 4, 2020, ordered Ludhiana MC to construct a road in Juhi Enclave within six months and constitute park management committees within three months. (Getty Images/iStockphoto)

    Court attaches Ludhiana MC chief’s official vehicle for failing to take up devp work in Juhi Enclave

    The permanent lok adalat (public utility services) has attached the Ludhiana MC commissioner's official vehicle and other movable property after the civic body failed to implement its order issued on December 4, 2020, to take up development work in Juhi Enclave on Jassiyan Road (Haibowal). As per information, residents of the Juhi Enclave had moved court seeking the construction of a road in the area.

  • Initially, police had ruled out the possibility of murder and initiated inquest proceedings, but after the autopsy revealed injuries to the head, a broken arm and injury marks on the back of the deceased, a murder case was registered.

    35-yr-old man’s murder in Ludhiana: Victim suffered head injury after being hit by train, reveals police probe

    A day after three men were arrested for the murder of a 35-year-old man who was found dead on the railway tracks near Jassian village on May 17, police investigation has revealed that the accused had pushed Harwinder onto the way of a moving train, which resulted in a severe head injury and ultimately, his death. A local court on Friday sent the accused to three days in police remand.

  • Police in Ludhiana said it appears that the cows were slaughtered in another location and then dumped in the Sirhind Canal. (HT Photo)

    Ludhiana: Remains of cows found floating in Sirhind Canal

    Panic gripped the Machhiwara area after locals found remains of cows floating in the Sirhind Canal near Pawat Bridge on Friday. They informed the police and deputy superintendent of police (DSP, Samrala) Harwinder Singh Khaira and sub-inspector Vijay Kumar, station house officer at Machhiwara police station reached the spot and initiated investigation. Divers were also deployed and they found polythene bags which were used to dump the remains. A suspect is yet to be identified.

Story Saved
Saved Articles
My Reads
Sign out
New Delhi 0C
Saturday, May 28, 2022