U.K. Supermarket Chain Experiments With Smart Food Label

British supermarket chain Sainsbury’s is testing an advanced labeling technology to help customers avoid tossing edible food in the waste bin before its time. The company sticks a color changing label to packets of its own brand sliced ham. The smart label changes from yellow to purple the longer the packet has been open. It is sensitive to temperature as well, because an open pack of ham has a relatively long fridge life when kept below 5º C (41º F). The new label is being used on ham packages in all 601 stores and will be expanded to other foods if consumers like it. [Image Credit: © Sainsbury's ]