Mahogany furniture is also very popular in the north, but it will crack even if you pay attention to maintenance in the north. What is the reason?

Surface crack: a crack on the surface. Crack refers to the crack on the surface of the original wood itself or the finished wood. Internal crack: Internal crack. Internal cracks, also known as honeycomb cracks, appear in the late drying stage and sometimes in the storage process of dried materials. Usually it is not easy to see from the outside of wood, but it can be judged by the depression on the surface when it is serious. Internal cracking is caused by tensile stress of wood inner layer. End crack: end crack. End cracks are either confined to the end face of wood or extend to one or both ends, and the latter is usually called cracks.

Wheel crack: this kind of crack develops along the growth ring direction and often extends to several adjacent growth rings. Wheel cracking generally occurs in the early stage of drying and appears on the end face of wood. With the drying process, the cracks gradually deepen and expand. Sometimes it happens inside, but it happens in the later stage of drying, which is caused by serious internal tensile stress. Prevention of mechanical cracks and methods of improving sawn materials 3. Waterproof coating adopts high temperature qualitative treatment. Soaking treatment adopts waterproof agent.

Wood swells when wet, shrinks when dry, and swells when dry. The expansion and contraction of wood volume will cause the deformation and warping of wood. The same is true of external force, gravity compression, deformation and warping. Because the water content of mahogany itself is not balanced with the water content of the external environment. The comprehensive factors of external natural environment lead to high water content, and wood absorbs too much water from the outside, which will lead to the expansion and warping of furniture. The moisture content of furniture is higher than the comprehensive factors of external natural environment. Wood releases moisture to the external natural environment, which will cause external air resistance.

The natural environment is dry, which will absorb the water inside the redwood. This is a problem between the dry moisture content of wood and the moisture content of external natural environment. When the moisture content of wood is greater than that of the external natural environment, water molecules in wood move into the atmosphere, that is, when the moisture content of wood is lower than the fiber saturation point, its volume will continue to dry and shrink. When dry wood absorbs moisture, it stops absorbing moisture when it reaches the fiber saturation point with the increase of moisture absorption. When the moisture content of wood is higher than the fiber saturation point, the volume of wood will not change only with the increase or decrease of free water. Due to the non-uniformity of wood structure, the expansion and contraction of wood volume may cause wood deformation and warping.