1. Festival The knot is the base of the branches of the tree that are hidden in the trunk during the growth process. The existence of the knot destroys the texture of the wood.
2. Discoloration and decay A fungus called a chromobacteria that invades wood and ingests nutrients in the lumen of the wood cell, causing a change in the normal color of the wood, called discoloration. There is also a fungus called decay fungus, which not only makes the structure of the wood gradually softer and brittle, but finally becomes a soft mass that is mesh-like or powdery. This phenomenon is called decay. Decaying causes significant harm in the use of wood.
The main methods to prevent wood decay are:
1. Reasonably store the wood, accelerate the drying of the wood, and maintain ventilation.
2. Apply closed storage method with oil preservative or directly soak in water.
3, with chemical preservatives for anti-corrosion treatment, commonly used agents are sodium fluoride, borochromium mixture, copper chrome mixture, lindane, arsenic arsenic chromium mixture.
Pests: The most common pests are the beetle, the geese, the termites, the dead insects and the tree bees. The hazards of these pests mainly come from the erosion of wood by their larvae, and the inside of the wood is quickly formed into a powder, which has a great influence on the material and use.
Crack: According to the location and direction of cracking, cracks can be divided into diameter cracks, wheel cracks and end cracks. Most of these are caused by improper drying of wood.
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