In the supermarket, there are individuals who like to open the package and steal the food. Japanese researchers have developed a food tamper-proof packaging technology. With this technique, as soon as the lid of the food container is opened, the pattern covering the lid changes color. This food anti-thief package places a small bag of ferrous oxide in a packaging container and another oxidation-indicating graphic logo on a transparent bottle cap. Once the cap is opened and fresh air enters the container, the ferrous oxide is converted to iron oxide by oxidation, and the color of the round logo also changes. This food anti-tamper packaging technology can be applied to granular, powdered, baked, baked and canned foods.

Source of information: pack.cn