![]() Petroleum-based inks also require print shops to use harsh cleaners on their printing plates and equipment, increasing the amount of VOCs emitted.Ī combination of oil shortages and the EPA's Clean Air Act of 1970 led the printing industry to transition many historically solvent-based inks to vegetable/soy or water-based inks. In the 1970s, most inks had petroleum-based carriers and were referred to as "solvent-based inks." When solvent dries, it releases volatile organic compounds in the air, which leads to poor air quality and adverse health effects for print workers. Pigments account for 10-20%, and additives account for 5-15%. Carriers account for 70-80% of a bucket of ink. Inks contain a few different components: pigments (what gives the ink its color), additives (that improve performance, drying time, resistance to smudging, etc), and carriers (the vehicle that transfers the ink onto the substrate that then dries off, leaving only the pigment and additive behind). Learn more about Algae Ink.īut we have come a long way since the 1970s. If you're printing in black, we strongly encourage you to ask for Algae Ink to keep you on the cutting edge of sustainable ink technology. ![]() The truth is that there is no ink available today that is 100% free of non-renewable resources or chemicals. Algae Ink (available with a water-based and soy-based carrier) comes the closest. I believe what people are asking is: Are your inks eco-friendly? Or Are your inks vegetable-based? or Are your inks water-based? We often get the question: Are your inks soy-based? A common man can find out easily that the document/product is original or fake.What is the Most Sustainable Ink? | What Inks are Eco-Friendly The developed ink has huge potential to combat counterfeiting. We thought that if these materials are applied for anti-counterfeiting, it will give better encoding, decoding capacity and thereby improve the security ability,” he added. “Lanthanide ions are known for their excellent downshifting and upconversion luminescent properties. 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 explained: “Trivalent lanthanide ions have very rich energy levels which help to exhibit both downshifting (absorb a high energy photon and emit low energy photon) and upconversion (absorb two low energy photon and emit a high energy photon) 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 simple co-precipitation method. The luminescent security ink developed by the researchers is based on lanthanides ions (Ln3+) doped Gd1-xBixPO4 nano-materials, and showed very strong downshifting as well as upconversion luminescence properties, the statement said.Īlso, the downshifting luminescence colour of the ink is highly dependent on the excitation wavelength, making it difficult to decode the covert tag. ![]() This work has been published in the journals Crystal Growth and Design and Materials Today Communications. To address this challenge, Sanyasinaidu Boddu’s research group from the Institute of Nano Science and Technology, Mohali, an autonomous institute under the Department, has 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. However, most of the materials reported recently for this purpose are based on fluorides which are less stable and highly toxic,” the Department of Science and Technology statement said. This is because increasing the number of parameters required to decode the tag decreases the possibility of decoding and replication. “To overcome this, luminescent ink with excitation-dependent luminescent properties (downshifting and upconversion) are advised. ![]() However, these single emission-based tags are prone to replication. Most of the security inks currently available are based on luminescent materials that absorb high energy and emit low-energy photons, or “downshifting”, where covert tag is invisible under daylight, but becomes visible under UV light. ![]() New Delhi– Indian scientists have developed a highly stable and non-toxic security ink from luminescent (spontaneously light-emitting) nano-materials to combat the counterfeiting of branded goods, bank-notes, medicine, certificates, and currency, an official statement said on Tuesday. ![]()
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