Energy transfer between bismuth and lanthanide ions results in excitation dependent downshifting emission. The patterns of this ink under different excitation wavelengths were found to be stable against various conditions which may occur during practical applications.ĭr Boddu explains, “Trivalent lanthanide ions have very rich energy levels which help to exhibit both downshifting – absorbing a high energy photon and emit low energy photon and upconversion meaning absorb two low energy photon and emit a high energy photon with luminescent properties. The composite ink was used to print patterns and letters on black paper. A composite was made with these nanoparticles and commercially available PVC gold medium ink. These luminescent nanomaterials were synthesized via a simple co-precipitation method. Its natural, carbon-based, and less likely to cause infection.Tattoo ink is deal, but India ink. The new luminescent security ink developed by the researcher is based on lanthanide ions doped with nano-materials. A non- toxic ink, like India ink, would be your best bet. However, these single emission-based tags are prone to replication.
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 a covert tag is invisible under daylight, and it becomes visible under UV light. If these materials are applied for anti-counterfeiting, it will give better encoding, decoding capacity and thereby improve the security ability, he added. You can use it with a brush, drawing pen or.
This work has been published in the journals ‘Crystal Growth and Design’ and ‘Materials Today Communications’,” Dr Sanyasinaidu Boddu the lead researcher said. Talens Indian Ink is made using a shellac based binder which delivers vibrant, opaque results in your artwork. “We have developed non-toxic metal phosphate-based ink with excitation dependant luminescent properties which are highly stable under practical conditions such as temperature, humidity, and light, etc. The new ink has huge potential to combat counterfeiting of branded goods, bank notes, medicine, certificates, currency. The versatile deep-black drawing ink for making, for example, pen-and-ink drawings, washed drawings and covering large areas. The innovators at the Institute of Nano Science and Technology, Mohali believes that with the use of new non-toxic security ink even a common man would be able to find out easily whether the document or a product is original or fake. WATERPROOF INKS include India ink, acrylic ink, and some oil-based ink.
New Delhi – Indian Scientist has developed a highly stable and non-toxic security ink from nano-materials that spontaneously emit luminescence due to its unique chemical properties. Some manufacturers may claim their inks are non-toxic.
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