The ceramic utensils used for eating and drinking such as plates, cups, bowls and other items have been a fundamental part of many societies since ancient times. The word “ceramics” is itself derived from the Greek word κεραμικός (“Keramikos”)¹ meaning “of or for pottery”. The art of making ceramics dates back thousands of years with evidence of pottery from 20,000 years ago² being reported recently from Xianrendong Cave in China. Ceramics manufacture depends on a source of various materials, namely clay, e.g. kaolinite, silica and feldspar.³ When these clay and mineral materials are mixed and soaked in water with removal of the excess water, a wet clay is produced which can then be fashioned into the desired shapes using moulds. Water is then removed via drying and the articles fired at temperatures up to 1170 °C during which complex chemical transformations occur in the clay with physical changes in the added silica and feldspar. Kaolinite (Al₂Si₂O₅(OH)₄ ) is converted via a series of precursor compounds to mullite (Al₆Si₂O₁₃) and cristobalite (SiO₂). The feldspar acts as a flux with the alkali metal ion content (Na₂O, K₂O and CaO) causing a lowering of the melting point of the silica early on in the firing process. This melt effectively forms a glass which then draws the individual particles of the fired mixture together and additionally reacts with them so giving the ceramic body strength (when it cools) and reducing porosity.