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What is kiln seasoning?
Kiln seasoning is the most effective commercial process for drying wood. It accelerates the moisture-removal process through the use of external energy.
What are the three different stages of kiln seasoning?
Stage 1 - steam is ejected into wood at a low temperature to force moisture out. Stage 2 - steam is reduced and temperature is increased to dry the wood. Stage 3 - then there is a flow of hot almost dry air
What happends to clay in the kiln?
A brick is a block of ceramic material used in masonry construction, usually laid using mortar.In Pakistan and India, brick making is typically a manual process. The most common type of brick kiln in use there are Bull's Trench Kiln (BTK), based on a design developed by British engineer W. Bull in the late nineteenth century. An oval or circular trench, 6-9 meters wide, 2-2.5 meters deep, and 100-150 meters in circumference, is dug. A tall exhaust chimney is constructed in the centre. Half or more of the trench is filled with "green" (unfired) bricks which are stacked in an open lattice pattern to allow airflow. The lattice is capped with a roofing layer of finished brick. In operation, new green bricks, along with roofing bricks, are stacked at one end of the brick pile; cooled finished bricks are removed from the other end for transport. In the middle the brick workers create a firing zone by dropping fuel (coal, [wood], oil, debris, etc) through access holes in the roof above the trench.
Collecting the sap of maple trees and condensing it over wood fires be known as?
In general, this is the process of making maple syrup. The sap is heated over wood fires which evaporates moisture and brings on a chemical change. The chemical change brings out a new flavor that was not present before the heating. This process is called sugaring.
Why is the bottom of the pottery not glazed?
Glaze is made of powdered silica and alumina and chemicals to make it melt at the right temperature. It is usally mixed with water to apply it to the pot. When it is heated to the right tempurature the glaze turns to liquid glass. If it is on the bottom of the pot then when it cools it will be permanently stuck to the kiln shelf it is sitting on. Some pots were fired on their rims insteand and the rims were covered with metal. Other pots are fired on stilts that touch the bottom of the pot in three points. In that case the bottom can be glazed and the stilt broken off. Some wood fired pots and salt glazed pots are put on wadding (small balls of high alumina clay) to keep them from sticking. Sometimes they still have to be ground clean of glaze. Other glazes like crystalline ones always run and must be put on high stilts and always ground clean in order to sit flat.
