Ink for Printed Elektronics (IMAGE) Linköping University Caption Polymer ink. The blue one is the donor polymer solution, while the red one is the acceptor polymer solution. Both pristine polymers are non-conductive because there are no free moving charges inside the polymers. When they meet each other, electrons from the donor polymer will automatically be transferred to the acceptor polymer, leaving free moving charges on both polymers. Credit Thor Balkhed Usage Restrictions Connected with news from Linköping University License Licensed content 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.