In the SilkLab at Tufts University bioactive inks have been developed that can function as a sensor either of the body wearing a garment printed with the ink or the environmental conditions surrounding the object printed with the ink. Amazing stuff.

‘The technology builds upon earlier work by the same researchers developing bioactive silk inks formulated for inkjet-printing to create petri dishes, paper sensors, and laboratory gloves that can indicate bacterial contamination by changing colors.”