Coal-Clay Composite Ceramics from Yingjing, Sichuan Province, China

Ethnographic ceramics from Yingjing, Sichuan Province, China, made with half powdered coal cinder and half clay. Image analysis was done to compare porosity of unfired sherd (3% Total Optical Porosity), sherd that was fired in the kiln but did not go into the adjacent ash glaze pit (11% Total Optical Porosity), sherd that was fully fired and ash glazed (11% Total Optical Porosity), and overfired sherd (25% Total Optical Porosity). Image analysis was done using Image-Pro Premier with Smart Segmentation tool. Full details about the coal-clay ceramics of Sichuan Province are found in: Chandra L. Reedy, Pamela B. Vandiver, He Ting, Ying Xu, and Wang Yanyu, Preliminary investigation of the coal-clay composite ceramics of Sichuan Province, China, in 2015 International Symposium on Ancient Ceramics – It’s Scientific and Technological Insights, edited by Chen Shiping. Shanghai: Shanghai Institute of Ceramics, Chinese Academy of Sciences, pp. 113-116 (2015).