Chinese literary name: Yuchuangmu
Latin scientific name: Guaiacum officimale
According to the testing of wood professional inspection institutions, the so-called sandalwood is mostly from Guaiacum officimale (Tribulaceae, Guaiacum officimale) in the West Indies of Central America, while the main species of sandalwood seen in the market are the wood of Zygophyllaceae and Bulnesia.
According to the wood professional inspection institutions, the so-called sandalwood is mostly Guaiacum officimale (Tribulaceae, Guaiacum officimale) from the West Indies of Central America. Besides the West Indies and Mexico, it is also distributed in other tropical regions of South America. The main species of sandalwood seen on the market are the wood of the genus Bulnesia (Zygophyllaceae). Bulnesia spp., commonly known as Verawood in English, Maracaibo lignum vitae in Britain, Guayacan Bola in Colombia, Beta and Velaaceituna in Venezuela. There are about 8 species in this genus. Trees B. arborea and Samivira B. sarmienti are common. Trees usually have a height of 12-15 m and ** up to 30 m. The trunk is straight and the diameter of breast height is 35-50 cm. It is distributed on the coast of South America, mainly in Venezuela, Colombia, Argentina and Paraguay.
From ancient times to modern times in China, people are accustomed to naming wood according to the color or pattern of wood, such as rosewood, yellow pear, ebony, Redwood and chicken wing wood. Many names can not be found in the works of wood science, such as the "green sandalwood" mentioned by readers. The so-called "green sandalwood" is not a scientific name, but a common name for lumber merchants or furniture manufacturers in order to raise prices in the market.
In addition, there are two kinds of timber, G. gua*** alense and G. sanctum, produced in the same area. The basic characteristics of wood are light yellow-white sapwood, green heartwood or light green heartwood, and shallow after a long time. The end of the log is covered with green spots. Diameter section shows different shades of green, with slender dark green or dark brown stripes; if it is a chord section, the outline texture composed of rings is very obvious. Green sediments were distributed in the pore and parenchyma of heartwood. Wood fresh cut surface fragrance, sawing aroma overflowing, sawdust is green and sticky, water color is also light green or dark green. When the moisture content is 16%, the air-dry density is 1.30g/cm3. Drying is very difficult, generally adopt the method of shade drying. The surface of processed wood is oily and shiny.
Wooden characteristics
Wood is extremely hard. Its air-dry density ranges from 1.1 to 1.33, with an average of about 1.25. Wood strength value is high. Drying is very slow, in order to prevent cracking in the drying process, it is necessary to paint the end face. The whole drying process should be carefully noted. Because the wood is extremely hard and the texture is interlaced, sawing and cutting are difficult, especially with manual tools; however, better finishing surfaces can be obtained by rotary cutting and moulding rotary cutting. Because of the oil content, the surface treatment such as sandpaper polishing and caustic sodium solution washing should be used before gluing. The corrosion resistance and insect resistance are very high, and termites and seaworms can not be corroded. Wood is not tall, it contains grease, has self-lubrication and low wear, so it has irreplaceable uses as mechanical materials, utensils and other materials in the world. Especially the bearings and bushes, sliders of ship propeller shaft, bushes of various industrial machinery, model materials, pulleys, axles, handle, frame saw sliders, etc.