50# bag; white bag, green textCedar Heights Fireclay
Cedar Heights Fireclay is generally used in recipes for stoneware clays. Fireclay is a type of refractory clay. Because of its high firing temperature, fireclay is typically used to make firebricks, kiln furniture, and is used in some sculpture and pottery clays. using a fireclay in a clay recipe will create plasticity and allow the clay to go to a higher temperature.
Information gathered from Digitalfire Ceramic Materials Database and The Potter’s Dictionary of Materials and Techniques by Frank Hamer.