To make a slab bowl the easy way, buy a hump mold, or in my case I bought a bisque bowl (a pot that has had the first firing) from my local ceramics shop.
1. Roll out your slab of clay
2. Apply your textures etc to the clay. In this case I pressed a wooden antique stamp that I bought from an antique store.
3. If you are using a bisque bowl lay your slab on the inside, or in this case I turned the bisque bowl upside down and put the slab of clay face down on the bottom of the bowl. I then added a few extra coils and small balls of clay to the edges and joined them to the main slab. A bisque bowl is the perfect mold to use as the clay does not stick to the mold and it helps the clay to dry out evenly thereby avoiding cracks in the clay.
Thought I would make a few plates with left over clay. For these plates I also lay the clay into bisque plates. Again to help provide the shape, but also even drying etc.