Source International – Manufacturing Materials – Learning Center
Earthenware is glazed or unglazed pottery which has not been vitrified and is normally fired below 1200°C. Bone China, Porcelain, and Stoneware, all which undergo the vitrification process, are the other most common types of pottery found in the market today. Earthenware is a broad term encompassing nearly all ancient forms of pottery, terra-cotta, building bricks, and the high-quality forms which make up the majority of our tableware products today.
For the most part, bodies made of this material exhibit higher plasticity than other forms of pottery and are easier to shape than their counterparts. As mentioned above, this material does not undergo the vitrification process, so it is more porous than its whiteware cousins. This means anything made from it must be glazed in order to become watertight. In addition, products made from Earthenware are more fragile than those made from Bone China, porcelain or stoneware and chip much easier.
Terracotta garden pots, certain oven wares, decorative pieces, and different types of tile are also classified as being made of Earthenware. The more orange and red colors of terracotta products come from the relatively higher content of iron oxide found in such products.