According to the German "Business Daily" report recently, experts at the Fraunhofer Processing Technology and Packaging Research Institute in Freising, Germany, recently designed a new type of cling film. This cling film contains a "scavenger-indicator system" that not only captures oxygen that is detrimental to food preservation, but also signals "high oxygen content in the package" through discoloration. When the temperature of the storage environment rises, the signal substances in the cling film are activated, and the excellent spots are revealed to let people know that the food has experienced an excessive temperature during transportation.
Another advantage of this cling film is that the use of food additives such as antioxidants can be reduced. Thomas Wanna, head of the research project, said that the plastic wrap that is being developed has been able to prevent the oxidation of orange juice in glass or plastic containers. The researchers hope that this new result will be used for the preservation of more kinds of food in the future.