Researchers from the University of Strathclyde in Scotland, UK have developed an intelligent ink make with light-sensitive nanoparticles that detect if a food package’s seal has been broken accidentally or by tampering by changing color in the presence of oxygen. The article says that the ink could be used on labels for foods such as milk, meat, and bread to warn consumers that the food is unsafe to eat. The article says that the ink is inexpensive and suitable for use on large quantities of labels.
