After a long and arduous effort, the classical school represented by the Palace Museum and the academics represented by the Chinese Academy of Forestry finally reached a consensus and scientifically defined the tree species belonging to the category of redwood and its technical parameters such as structure and density. The three conditions that must be possessed by the mahogany are clearly defined.
(1) Tree species: five genera, seven classes and five genera: red sandalwood, Dalbergia, diospyros, yadou, and iron knife wood: rosewood, rosewood, black rosewood, red rosewood, ebony, striped ebony, Chicken wing wood
(2) Structure: The timber structure is very fine to fine, and the average diameter of the pipe is below the specified value. The specific standard is: rosewood: the average diameter of the pipe is not more than 160μM; rosewood, black rosewood, red rosewood , chicken wing wood: average duct chord diameter is not more than 200μM; ebony, striped ebony: average duct chord diameter is not more than 150μM
(3) Density: When the moisture content of wood is 12%, the air dry density of each type is above a certain value, specifically: rosewood: air dry density is greater than 1.00g/cm3; rosewood: air dry density is equal to or greater than 0.76g/ Cubic centimeters; black rosewood, red rosewood, ebony, striped ebony: air dry density equal to or greater than 0.85g / cubic centimeter; wenge: air dry density equal to or greater than 0.85g / cubic centimeter
Because the definition of mahogany raw material is a science, there is no standard, and the standard limit is too dead is not conducive to its development. Therefore, some additional explanations are needed:
(1) Ebony: This is the most popular Japanese name, and is considered by the contemporary Japanese to be the best ebony wood product. It is understood that the main thing is striped ebony, and a small amount is ebony or black rosewood.
(2): Elm: In ancient China, the tree that was caused by disease was a sputum. It is not surprising that the local long-term tumors are common, but a few rare woods have larger tumors, and some even grow into empty cores. All the nutrients are concentrated on the tree tumors. The fibrous tissue inside the tree tumors is produced. The change has formed a variety of beautiful patterns, which we call "the coffin." There are many varieties of eucalyptus. Such as: birch, maple, cypress, rosewood, etc., among which rosewood is the most expensive. Some of the panels of classical mahogany furniture handed down are made of this eucalyptus. The eucalyptus wood is rich in texture, not deformable and very rare, so it is a very valuable decorative material.
(3) White rosewood: The new national standard has classified it into red rosewood and is no longer subdivided.
Material characteristic: Using high quality aluminum extruded shutter profiles, multi-layer painting or film layer surface have excellent scratch resistance function, not decay, wearable and anti-collision.Nice white profiles, accepting mass customization according to users requirements(light gray, brown, cream, wood, fused, sand color and light sand color ,etc.)
Integrated protection and decorative features together,the best replacement of traditional theft network security replacement; flexible way open ways, supporting hand control, group control. The door could be your safe rescue channel when in emergency.
When in state of close, support ventilation and lighting, this contribute to enhance the cooling and heating effect of air conditioner, ensure safety, comfortable, energy saving, noise isolation and aesthetics.
Aluminum Roller Shutter Door,Commercial Aluminum Roller Shutter Door,Aluminum Alloy Roller Shutter Door,Color Steel Aluminum Roller Shutter Door
Shenzhen Hongfa Automatic Door Co., Ltd. , https://www.spiralfastdoor.com