Film treated with heat recovery ink (IMAGE) KTH, Royal Institute of Technology Caption A film treated with the thermoelectric ink that was developed at KTH Royal Institute of Technology Credit KTH Royal Institute of Technology Usage Restrictions Credit must be given to the creator. License CC BY Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.