Using Intelligent Nano Ink to Detect Oxygen in Food Packages

Nano ink indicates safety breach in food packaging. ‘A new ink leverages nanotechnology to detect the presence of oxygen in food packages, giving a warning that the product is no longer safe to eat. The ink can be used by processors as another way of assuring wary consumers that their products are protected against faulty packaging and tampering. Once oxygen enters a food package, either accidentally or by tampering, the ink changes colour, warning the consumer that the food is no longer safe to eat.
The ink was developed by Andrew Mills and a team of scientists at the University of Strathclyde in Glasgow. The “intelligent ink” was created using light-sensitive nanoparticles, which only detect oxygen when they are ‘switched on’ with ultraviolet light.
Leaking food packages are not uncommon, said Mills. Once oxygen get in the freshness of the food is drastically reduced so it may no longer be safe to eat.’

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