Cold Sintering 2 (image) ETH Zurich Share Print E-Mail Caption This is a sample of cold sintered calcium carbonate (sample diameter: 2 centimeters). Credit ETH Zurich / Peter Rüegg Usage Restrictions Reporting about this ETH Zurich research paper. Share Print E-Mail 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.