Ceramic glazes and their effect on tea. (IMAGE) Nagoya Institute of Technology Caption Sample pieces of glaze-coated tile (b) tea solutions before and after mixing with glazes (top) and degraded tea solutions with and without existence of glazes (bottom). Credit Takashi Shirai from NITech, Japan 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.