There are a few types of kiln firing. During the course I learnt about Bisque and Glaze firing. For Bisque Firing, the pots must be bone-dry and then packed into the kiln. The stacks can be stacked on each other or props and shelves can be used to create levels. There are three main cycle to take note of. In the first cycle, pots are fired steadily for 6 hours at the rate of 100 deg celsius per hour. Steam from the moisture in the pots will start to form and the flue cover will have to be removed. It can be replaced before the next cycle.
At the next cycle, the clay morphs into ceramic. It will fire continuously till it reaches the temperature of 1000 deg celsius at the rate of abt 110 deg celcius. This will take around 3.5 hrs. The last cycle is where the pots are left to soak in the remaining heat for about 15-20 mins. Below is a drawn cross sectional view of a kiln.
No comments:
Post a Comment