Porcelain sinks have been around for a long time and have been a popular choice throughout the world as sink material. Porcelain is a type of hard ceramic material fired at a temperature higher than that used to fire stoneware pottery and glazed earthenware. It is white or off-white in color, translucent but is often decorated for additional coloring. Most porcelain kitchen sinks are not made of porcelain, though you may find some that are. The porcelain is used as a coating on cast iron or other metal base. Porcelain's strength as a sink material is its glassy hardness and durability which make it easy to keep clean, bright, and shiny. On the other hand, porcelain is rather brittle, and can chip easily. Since porcelain is porous, it can become stained over time. Other than that, porcelain is great choice for a kitchen sink.