After a lump of clay has been
centered on the potter's wheel, it must be opened up and the base formed. This
tutorial will discuss this opening up procedure as well as showing you what to
do when things go wrong. Much like this video, it goes over lots of little
details about how and why certain things are done. In this detailed guide,
we're going over one thing, and that's how to open up the lump of clay and form
the base. A centered lump is our starting point.