When you’re standing in the frozen food aisle, it’s nearly impossible to know whether that Salisbury steak has thawed and refrozen — a process with potentially harmful consequences. So, researchers have now designed a food-grade device from edible materials, including table salt, red cabbage and beeswax, that lets you know. The proof-of-concept sensor provides a color readout when it’s warmed above a specific temperature, which is tunable from -58 F to 32 F.
Click here for original story, Toward a fully edible sensor showing if frozen food has previously thawed
Source: ScienceDaily