1. Naturally dry or air dried
air drying is the drying of wood by exposing it to air. The key to air drying technology is that the environment needs to be clean and cool. In a dry and cool place, a stack of sawn timber is made on the piled foundation. The drying rate is highly dependent on climatic conditions and air movement. For successful air drying, it is necessary to arrange a continuous and uniform air flow throughout the wood pile.
Advantages: the use of this drying method is related to the production cost of wood, which usually produces good wood quality.
Disadvantages: depending on the weather, it takes several months to dry the wood.
2. Artificial drying
the process of artificially drying woodworking wood is basically done by introducing heat for rapid drying. Solar energy is also an option, either directly using natural gas or electricity, or indirectly through a steam-heated heat exchanger. In this process, specific drying characteristics are achieved by controlling variable conditions such as temperature, relative humidity, and air circulation. To achieve this, the wood is stacked in a confined space containing equipment for controlling atmospheric temperature, relative humidity and circulation rate.
Almost all woodworking wood in the world is dried in industrial kilns. Drying temperatures above 60 °c usually kill all fungi and insects in the wood. Dry air is not guaranteed. At the same time, if the air is not dried properly, the dry summer may dry too quickly, causing cracking and splitting. It is too slow in the cold winter.