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The Thermo wood process consists of drying, heat treatment and finally cooling/conditioning, and takes up to 72 hours.[4] The Plato process consists of hydrothermolysis, dry curing and conditioning, and can take up to 7 days. The required time depends on wood species, width and initial moisture content. [5]
Wood drying (also seasoning lumber or wood seasoning) reduces the moisture content of wood before its use. When the drying is done in a kiln, the product is known as kiln-dried timber or lumber, whereas air drying is the more traditional method. There are two main reasons for drying wood:
Wood treated with this process is often used for cladding or siding, flooring, furniture and windows. For the control of pests that may be harbored in wood packaging material (i.e. crates and pallets), the ISPM 15 requires heat treatment of wood to 56 °C for 30 minutes to receive the HT stamp.
Kiln. A kiln is a thermally insulated chamber, a type of oven, that produces temperatures sufficient to complete some process, such as hardening, drying, or chemical changes. Kilns have been used for millennia to turn objects made from clay into pottery, tiles and bricks.
Traditionally, pieces have been fired in wood-fueled kilns or simple in a pile with wood. This is low-fire method as the temperatures achieved do not exceed 800 °C. [ 15 ] [ 16 ] Better wood kilns and gas kilns can reach temperatures of between 900 and 1000C, which is not quite yet high-fire, but allows the use of more types of low lead or ...
Tar kiln. Top-lit updraft gasifier. Tube furnace. Tybo Charcoal Kilns.
When used as fuels, coal and wood can introduce smoke, soot and ash into the kiln which can affect the appearance of unprotected wares. For this reason, wares fired in wood- or coal-fired kilns are often placed in the kiln in saggars, ceramic boxes, to protect them. Modern kilns fuelled by gas or electricity are cleaner and more easily ...
Solar-powered or fuel-fired kilns can accelerate the drying process. [8] The most common process of removing the excess moisture is called seasoning. Seasoning by air-drying the wood can take three years or more. Wood is dried in outdoor well-ventilated covered structures, or in a kiln. All wood will release creosote vapors when burned.