ca: ARGILA DE BOLES
es: ARCILLA DE BOLAS
Ball Clay is mixed with many types of clay to build up their bonding and working properties, to increase their plasticity and strength. It is called ball clay because when originally found it was formed in the shape of a ball. When fired it becomes a greyish white color.
Found in Devon and Dorset in England and also in Kentucky in USA, where it is known as Kentucky ball clay.