up-draught

Fig. 2-15: Chimney effect creates hot spots in an up-draught kiln.

2. Kilns 1987

In fig. 2-8 a simple up-draught kiln is nearly ready for firing.

2. Kilns 1987

The Bujora kiln (p. 53) has an up-draught biscuit chamber which at the same time serves as a chimney.

2. Kilns 1987

In the Near East up-draught kilns with permanent outer walls were developed (fig. 2-9) and this type of kiln spread with migrating potters from Persia to India.

2. Kilns 1987

These up-draught kilns were originally developed in Germany, by the beginning of the 17th century, in an attempt to produce porcelain which was then only produced in China.

2. Kilns 1987

Fig. 2-11: Setting of pots in an up-draught kiln has to be done so that the hot gases rise evenly throught the pots.

2. Kilns 1987

The cross draught kiln originated in the Far East and as with the up-draught kiln this type of kiln must have developed gradually from the open bonfire.

2. Kilns 1987

The bottom of an up-draught kiln tends to become hotter as the hot gases strike here first.

2. Kilns 1987

The up-draught kiln is wasteful because the hot combustion gases rush too quickly through the kiln setting, so that the heat of the gases has little time to be transferred to the ware.

2. Kilns 1987

This kiln was constructed with a second chamber which works as an up-draught kiln and chimney.

2. Kilns 1987