I can't tell you the exact year, but I can tell you have seen them as old as 8,000 years old in museums all over the world.
Firing clay is when a clay is fired in a kiln, this is to make the clay stay strong.
bisque firing
When the clay dries just prior to firing.
Are you asking what kind of clay types there are? What can you make with clay? or what different processes there are for firing the clay?
This depends on he melting temperature of the wire that you are using. It also depends on the firing temperature of the clay. If the melting temperature of the wire is higher than the firing temperature of the clay, then wire can be added to a clay piece.
so he could make vessels
Clay is easy to shape before firing. It is also cheap.
clay vessels
for scientist its monkey but for priest we are clay
saggar
Firing clay is not a stone age invention. So no.
bisque is the name of the hardened clay called after the first firing in the kiln.