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.
The process of heating clay, known as firing, involves subjecting it to high temperatures in a kiln. This process transforms the raw clay into a hard, durable ceramic by causing chemical and physical changes, such as the removal of moisture and the vitrification of minerals. Firing typically occurs in two stages: bisque firing, which strengthens the clay body, and glaze firing, which adds a glassy finish. The specific temperature and duration depend on the type of clay and desired outcome.
so he could make vessels
Clay is easy to shape before firing. It is also cheap.
It depends on what kind of clay it is, whether it be terra-cotta, stoneware, or porcelain. Each of these clays has different clay particle size. Also, it depends on how much water is in the clay. The more water, the more it will shrink in the firing process.
saggar
for scientist its monkey but for priest we are clay
Firing clay is not a stone age invention. So no.