Porcelain is a semi-translucent ceramic that is valued for its delicate appearance and its strength. It was created in China by combining white clay and a type of feldspar found almost exclusively in that country. When the ingredients are fired at extremely high temperatures, the feldspar melts to form a natural glass that fuses to the clay particles.Medieval craftspeople used lead glazes fired on red clay to create colourful, waterproof tiles that were used as flooring for churches, expensive homes and stately bui... read more