Acid branch wood is a kind of legume plant of Dalbergia in the subfamily of sphenopsis. It is named after its pungent sour taste after its wood is cut open. Acid wood is a general term for many kinds of wood, mainly distributed in the tropics and subtropics, Southeast Asia is the main producing area, and there are some acid wood in China.
Acid branch wood is mainly composed of red acid branch and black acid branch. Generally, the acid wood with "grease" is superior in quality, fine in structure, strong in nature, and can sink in water. What is particularly obvious is that there are often dark brown or black stripes in the dark red, which are clear and varied.
Morphological character
The difference between heartwood and sapwood is obvious, sapwood is yellow white to yellow brown, some trees are brown, etc.; heartwood is orange, light reddish brown, reddish brown, purplish red, purplish brown to black brown; wood color is uneven, dark color stripe is obvious. Growth ring is not obvious or slightly obvious. Porous material or half
Ring hole material, single pipe hole, a small number of double pipe holes or thin pipe hole groups, containing dark gum, sediment or infilling body. The axial parenchyma is winglike, poly winglike ribbon, ring tube bundle and wheel boundary.
The wood structure of acid branch wood is very fine to fine, and the average diameter of the chord direction of the pipe hole is not more than 200 μ m; the diameter surface speckle is not obvious or slightly obvious, and the chord surface ripple. The wood is glossy, with sour or sour flavor (a few are rose aroma), with oblique or staggered texture, fine and even structure (a few are medium) and strong corrosion resistance and durability. The material is hard and heavy, with high strength. When the moisture content of wood is 12%, the air dry density is greater than 0.85g/cm3, which is usually submerged in water.
Acid branch is the main raw material of mahogany furniture in the Qing Dynasty. Furniture made of acid branch, even after several hundred years, is still shining like the new excellent acid branch wood, which has attracted the world's attention for a long time. There are two kinds of acid wood color, dark red and light red. Generally, the quality of "grease" is superior, and the texture is clear and varied. Acid branch furniture is polished and painted, smooth and smooth, with durable luster, giving people a kind of pure and implicit beauty. Not only the quantity is large, but also the quality of wood is good, and the manufacturing process is exquisite. In the modern concept, it is the real mahogany furniture.
Growth environment
It is mainly distributed in the tropics and subtropics, Southeast Asia is the main producing area, and there are some acid trees in China.
Main categories
There are three kinds of acid wood: black acid wood, red acid wood and white acid wood. There are also a few sour flowers.
Among the three kinds of acid wood, black acid wood is the best. Its wood is hard and has good polishing effect. Some are very close to red sandalwood, but most of them have coarse texture.
The texture of red acid branch is smooth and straight, most of the color is jujube red, and a few of the color is dark red.
Black sour wood
It mainly includes: Belize yellow sandalwood, Amazon yellow sandalwood, Brazil black yellow sandalwood, East Africa Black Yellow sandalwood, Lu's black yellow sandalwood, broadleaf yellow sandalwood, black yellow sandalwood, knife shaped black yellow sandalwood.
Price of main furniture materials of black acid branch wood:
Broad leaved yellow sandalwood: commonly known as South American sour branch, the grain is close to the cross toe, and the current price is about 130000 / T.
Ebony in East Africa: commonly known as red sandalwood, the wood structure is very tight, and the current price is about 20000 / T.
Lu's ebony: it's commonly known as red sandalwood with big leaves. Its current price is about 150000 / ton.
Red wood
According to the national standard of mahogany, there are four necessary conditions for mahogany: ① Dalbergia species; ② fine wood structure
It is very fine, the average diameter of the tube diameter is not more than 200 microns; ③ the air dry density is more than 0.85g/cm3 when the moisture content of wood is 12%; ④ the wood heartwood is reddish brown to purplish red.
The difference between mahogany and black mahogany lies in the color of heartwood, which is chestnut brown with black stripes.

The species are:
Dalbergia barensis, a large tree, is distributed in Southeast Asia;
Dalbergia cearensis, large tree, mainly distributed in Brazil;
Dalbergia ochinchinensis, a middle tree, is mainly distributed in Thailand, Vietnam and Cambodia;
Dalbergia frulescensvar, large tree, mainly distributed in Brazil;
Dalbergia granadillo, a large tree, is mainly distributed in Central America, Mexico and other places;
Dalbergia oliveri, a medium to large tree, is mainly distributed in Myanmar, Thailand, Vietnam and Laos;
Dalbergia retusa, a middle tree, is mainly distributed in Central America.
All of them are red acid branch, but the material of red acid branch is different. The color of heartwood is dark or light, and the wood color is divided into partial red system and partial Brown system.
Mahogany of reddish system: new cut of heartwood lemon red, reddish brown to purplish red brown, often with obvious black stripes, heavy density, air dry density of 1.0 g / cm3, the main production area is Indochina Peninsula. The color of heartwood is also dark and light. The light color is yellow and the texture is straight.
In the market, most of the mahogany trees have straight grain texture, with chestnut brown stripes like black mahogany trees. In the industry, they are called "green tendons", just like the green tendons - blood vessels under human skin. The wood with good quality will turn dark when it is kept for a long time. It is dark jujube red to purple red. The color is quite like sandalwood and red sandalwood. The wood is as delicate as Lu's black and yellow sandalwood, which is the best quality of mahogany.
Reddish acid branch wood of brownish system: the new section of heartwood is purplish red brown or dark red brown, often with black brown or chestnut brown Pinstripe, which is produced in Southeast Asia. The heartwood of high quality is purplish red or dark reddish brown, and the chord section is like the skin pattern of the belly of yellow croaker. There are also special texture types in mahogany. There are light colored stripes like muscle fibers on the chord section, slightly like the "V" texture of chicken wing wood; there are also twisted and exaggerated patterns on the chord section.
Main value
Among the three kinds of wood, the black acid branch is the most precious and rare. The real black acid branch furniture is very rare. Most of them are red acid branch furniture. The quality and value of white acid branch and flower acid branch are relatively low.
Identify
Due to the different origin of raw materials of acerbic acid branch wood, its materials are also different, so the price of raw materials is also different.
It is generally believed in the market that the quality of acid wood with darker color is good, while the material of red acid wood with lighter color is not as good as that with darker color. It is because of the price difference between the two raw materials that some manufacturers dye the reddish acid branch with lighter color to make it dark.
So, how to distinguish the two materials of finished furniture?
Identification 1: the identification of mahogany depends first on whether its growth ring is obvious. The authentic mahogany heartwood is orange red brown, purple red brown and deep purple; the wood is hard and heavy, usually sunk in the water, with purple and black stripes and landscape patterns with oil as the best material for making furniture and crafts.
Identification 2: the heartwood of black acid branch wood is purple black, dark purple and reddish brown, with black stripes. It is rare and expensive. Once polished, smooth and lubricated, it gives people a mellow and implicit beauty, which is the main method of identification of black acid branch wood.
Identification 3: another common characteristic of the white sour branch and the other two sour branches is that they will give out a taste of edible vinegar during the processing. It has no red acid branch, and its oil property is not as big as red acid branch. After processing, it is similar to CaoHua pear, but its price is much more expensive than CaoHua pear.
Daily maintenance
Maintenance methods of acid wood furniture:
1. In the first two to three years of use, it is best to use solid floor wax for a comprehensive waxing maintenance at the turn of seasons. In the use process, furniture will constantly "anti oil" from the inside to the outside, which has a good self-care effect. After a few years, there will be "slurry coating" phenomenon, so there is no need to wax.
2. In the process of wiping, it's better to wipe with a coarse cloth. The surface of furniture will be more bright and clean day by day. There are many places for carving and hollowing in hardwood furniture. Some places are difficult to handle with cloth, just brush with shoes, and the harder the brown hair of the brush, the better the effect.
3. When cool or overheated utensils or articles are placed on the surface of furniture, there will be a "white mark" phenomenon, which will affect the appearance. This phenomenon is only the natural reaction of wax on the surface of furniture, and the wood body itself is not damaged. It's very simple to deal with. Just polish it with 800 water sandpaper and wipe it with a cloth.
4. Acid branch wood furniture should not be placed in the position of direct sunlight. If it is placed too long, the surface of furniture will fade due to the influence of ultraviolet light in the sun.
5. In rainy season, windows should be opened for ventilation. In the air-conditioned room, the temperature must be kept at 15-25 degrees, or a proper amount of bonsai and fish tank should be placed beside the furniture to adjust the relative humidity of the air. When the air humidity is too low, the hardwood furniture will contract, and when it is too high, it will expand. When using and placing, it should be noted that it should not be placed in the place that is too wet or too dry, such as the place close to the furnace heating and other high temperature and high heat, or the place that is too wet, such as the basement, so as to avoid mildew and cracking. The tabletop should not be covered with airtight materials such as plastic cloth.
6. No gasoline, acetone and other organic solvents are allowed to clean the surface of acid wood furniture to avoid chemical reaction with wax on the surface of furniture.
7. Handle with care when moving. During use, avoid impact of sharp tools and hard objects. If there is dust and grease, use a duster and clean with soft cotton cloth.
8. Sour wood furniture should be wet and dry, so it should not be exposed to the sun, and avoid the air conditioning