Under the premise of not changing the physical properties of the wood, it can be called solid wood after drying, liposuction, painting and other processes. Plywood (English: Plywood, commonly known as: multilayer board) is one of the commonly used materials for furniture, and it is a kind of wood-based panel. Plywood is a three-layer or multi-layer board-like material that is made of wood sections that are peeled into veneers or sliced into thin wood, and then glued with adhesives. Usually, odd-numbered veneers are used, and adjacent layers of veneers are used. The fiber directions are glued perpendicular to each other. It destroys the physical properties of the wood itself. The main ingredient in it is glue, so it will not crack, but it cannot be called solid wood. Now there are solid wood particle boards, density boards, particle boards and other boards on the market. It is wood chips, saw foam, straw and other things containing wood fibers, which are very cheap, so the cost of producing MDF is very low, so the market price is cheaper than solid wood.
One of the commonly used materials for furniture is a wood-based panel. A group of veneers are usually assembled and glued together according to the direction of the wood grain of adjacent layers perpendicular to each other. Usually, the surface board and inner layer board are symmetrically arranged on both sides of the center layer or core. The slab made of the veneer after gluing is criss-crossed according to the direction of wood grain, and pressed under heating or non-heating conditions. The number of layers is generally an odd number, and a few have even numbers. The difference in physical and mechanical properties in the vertical and horizontal directions is small. Commonly used are three-ply board, five-ply board and so on. Plywood can improve wood utilization and is a major way to save wood. It can also be used as a material for aircraft, ships, trains, automobiles, buildings and packing boxes.
The usual length and width specifications are: 1220×2440mm, while the thickness specifications generally include: 3, 5, 9, 12, 15, 18mm, etc. The main tree species are: camphor, willow, poplar, eucalyptus and so on. The main origin of plywood: Indonesia and Malaysia.
Solid wood refers to pure solid wood, that is, all materials are natural materials without further processing, and furniture made without any wood-based panels. Solid wood furniture has pure solid wood furniture and imitation solid wood furniture. Pure solid wood furniture means that all the materials used in the furniture are solid wood, including desktops, wardrobe door panels, side panels, etc. are made of pure solid wood, without using any other form of wood-based panels.