SLAB - Clay that has been flattened by rolling. SLAB CONSTRUCTION - A handbuilding method that involves joining flat pieces of clay together (clay is flattened and thinned with rolling pin or slab roller) SLIP - A liquid clay used as an adhesive or decoration. It can be painted or molded into shapes and allowed to dry. The word "slab" comes from the fact that it was once made by flattening wet clay until only a thin layer remained, like a slab of rock. The first slabs were probably made for use as tools by early humans; they would have been useful for smoothing skins for making clothing or marking territory. Today, clay is still used to make slabs for various purposes. Slabs are used by potters when making pots and vases. They also use them to create decorative items such as tiles and candle holders. In addition, they are important elements in building models and toys. Finally, slabs are used by sculptors, both professional and amateur. To make a slab, you need to gather some ingredients: fine-grained clay (such as mud or plaster of Paris), water, and time. You will also need a tool called a slab roller to flatten out the clay. The more expensive rollers can produce very even slabs with a smooth finish.