Purple rosewood (Lulberry black Dalbergia) Dalbergia louvelii butterfly flower family FABACEAE Dalbergia, black rosewood.
Commercial name: Persian rose Bois de rose, the main production of Madagascar. The wood merchant who came back from Mozambique said that the country also has this kind of timber, but it is not allowed to cut down.
Trees and distribution. The local overseas Chinese wood industry manager said that the felled tree can be bought, a long wooden 10m or so, and then cut into 2.2m long four log containers. This tree is about 5 to 6 stories tall. Growing on the slopes by the sea.
The origin of wood. The Republic of Madagascar, an African island country, faces the mainland on the west coast of the Indian Ocean across the Mozambique Strait. A friendly country, established diplomatic relations with China in 1972. And invited the assistance of the Chinese government, China sent a large number of scientific and technical personnel and staff to help Malaysia. Their outstanding achievements in work have won the government's recognition and the love of the people. When the employees returned to China, the people of Malaysia were reluctant to ask some of their employees to stay and become local official overseas Chinese. After China's reform and opening up proposed that the timber was imported for ten years, some employees assisted Ma Guo to open timber trade, transported the purple acid branch to trade, first entered Shanghai, and soon entered Guangzhou and Tianjin. When the baby was locked in the warehouse, it was only sold when it was sold. The warehouse picks up the goods. After the listing, many users were invited to buy, so the price continued to rise, and the timber trade between the two countries was active, which also enhanced friendship. Unfortunately, this Persian rose grows slowly, the trees are small, and very precious. At the same time as the scale of felling, it has become an endangered tree species. It is now forbidden to cut down, that is, the container that is loaded at the port is also stopped.
The purple rosewood is shipped from Guangzhou to the port of Tamatave in Madagascar, because the precious species are transported in containers. All the unloading in the site is the heartwood logs scraped off the sapwood. The surface is black and purple. It seems to be coated with a layer of oil. The knife is used to cut off the black and purple layer on the surface, and the inside is still purple. The specification is small, the general length is 2.2m, the diameter is 16~30cm, usually between 20-26cm. Wood merchants say that there are about 40cm, but there are not many, they have entered the Shanghai market. This kind of log scraping the sapwood is so straight and round. Bending and heart rot are very few. Individual splitting is caused by accidental cutting when the tree is cut.
The outer skin is purple, about 1mm, and the epidermis is smooth and the lifted skin is torn off. The endothelium is dark brown with a purple hue and a thickness of 5 to 6 mm. Under the magnifying glass, the cortical ring of the section is visible. There are air holes (such as tube holes), single air holes, and aerobic aperture columns. There are also pore groups, sparse. Sometimes brown deposits in the pores are visible, and the skin is also covered with silicon particles. Sometimes small silicon bodies are hung on the walls of the holes, and the sunlight shines. The bark of the bark is 6~7mm thick, hard, tough and fibrous, and it is not easy to break. The broken cortex is like a donkey, and it is tied. The bark was loosened with a hammer and the apparent cortex was separated. Regardless of whether the bark is wet or dry, it is not easy to peel off. With a bladed stylus, the skin leaves the surface of the material and the strips are peeled off by hand. The skin is smooth, dark brown, and water penetrates the skin. This part is black. After peeling off the bark for a few days, it turns purple, the material is smooth, and there are longitudinal short cracks.
Wood characteristics. Loose hole material. The new saw vertical section growth wheel is not clear. The logs on site were all cut with a knife and repaired into a smoother circular section and bevel. The growth wheel can be clearly seen depending on its arc and slope. The 10cm diameter vertical plate provided by the wood merchant is placed in the water to sink to the bottom, and the annual rings in the water are clear. The difference between heart and sapwood is obvious, the sapwood is about 1cm narrow, grayish white, and the junction with the heartwood changes sharply. The sapwood often has black short stripes. The bark stayed in the depression. After one year, the sapwood under the bark of this part became purple, and there was no heartwood. The heartwood is purple, and the color becomes darker after a long time, and the surface turns black purple or black like ebony (new cut green orange). In the diameter section, black stripes are particularly noticeable near the sapwood. Scratches are obvious. The tube hole is large and sparse, visible to the naked eye, single tube hole, individual tube hole, and 2 radial columns. The channel of the plate is clearly visible to the naked eye. The new cut material magnifying glass contains pink deposits in the hole of the tube. It will turn dark brown for a long time, and it can be clearly identified with wood under the light and sunlight. Contains silica, some filled with tube holes, and spots and light appear on the surface of the plate with the length of the channel. A close look at the entire specimen is a silver light, which is really the "Galaxy Nebula." The thin-walled tissue is lighter than the wood ray, and the main concentric layer type thin line is arranged neatly. This neat arrangement is "excellent" in the Dalbergia genus, which is a feature that identifies this wood species. There are also loops and a few short wings. The wood ray is fine, visible under the magnifying glass, and the single row of the peers, and the thin-walled tissue lines form a network. The wood merchant said that the wood is red sandalwood. Nowadays, because of the obvious scratches, this point is like authentic red sandalwood. However, when sawing, the sour gas is thicker than the red sandalwood, and the tube hole is large and sparse. Sometimes, the tube hole contains black matter, and the thin-walled tissue and the wood ray form a network, and the specific gravity is light and the density is not uniform, which is different from the purple.
Wood properties. The wood structure is very thin or thin. The texture is staggered, with a curved and shiny. The weight is very heavy, and the air dry density is 0.95g/cm3. But the density is not uniform. A 26 cm diameter log heartwood was used for rough testing. Take the log radius as the test point, saw into the plate test piece, put the balcony for half a year, the moisture content is about 12%, the test piece of the sapwood part of the heartwood is very heavy, the specific gravity is over 1, and it is placed in the water and the bottom is sounded. The two specimens were heavy in wood and placed in the water. The surface of the board was like a water surface. The specimen near the heart of the heart floated about 0.8g/cm3 on the surface of the water. There was no water in the water for 24 hours. Full dry shrinkage rate: 3.7% in the radial direction, 6.7% in the chord direction, and 10.5% in the volume.
Mechanics. Because the density is not uniform, it is also very hard and hard. The bending strength is 215.7 MPa, the compressive strength of the grain is 77.5 MPa, and the hardness is 112.5 N.
dry. Harder. The wood is expensive, so that the plate is not sampled as much as possible to ensure the quality of the product. The low temperature method is adopted, and the drying is slow. It usually takes about 30 days in the furnace. It does not deform or crack when it is released, but the color becomes darker.
Processing. Although the amount of silicon is rich, the sawing of wood is easy. The general specifications are not large, manual operation with a band saw, sawing into a sheet or a small hoe. The sawing is smooth. On-site trial saw, the log size is 2.2m long, the diameter is 26cm three, the sawing 3cm thick the edge board, no saw blade, the sawing edge is straight, no wave type. The finishing is smooth, and the nails are drilled first to avoid nail bending and high speed when planing.
Durability. Very durable, resistant to termites. Three years of stacking have not found termite erosion and decay, and no small cysticercosis has been found. No cracking. In the warehouse is as good as ever.
use. Most of it is used for furniture, carved furniture, and carved crafts.
The wood of the Dalbergia genus is generally called the acid branch. Persian rose, purple color, as the name suggests, call it purple rosewood. Entering China into the category of redwoods, precious. For listed logs, the merchants do not check the size, use the weight, and trade the pounds. The operator used the pool as a test site, and put 10 logs into the pool one by one with a crane. The strips were sounded at the bottom, and the proportion was definitely more than one. The people present said that the wood was well received by the users. Another one is an individual test, a 2.2m long, 26cm diameter three logs, sawn with a band saw into a sapwood, and found three 3cm thick burrs in the middle, each piece becomes a neat three pieces. Why is this? After analysis, the wood density near the medulla is small, the shrinkage is large, and it is separated from the dense boundary line (the log section should show a ring crack, but the ring crack width is too narrow, the naked eye can not find), this This phenomenon is related to the uneven width of the whole wood.
This purple rosewood has entered the country to fill the gap. It is generally used to manufacture Ming and Qing mahogany furniture style products and carving crafts. Ming Dynasty furniture design, reasonable function, rigorous structure, beautiful shape, the use of materials to pay attention to the formation of a distinct and unique style, has always been considered the peak of China's furniture history, known as "Ming-style furniture" and included in the history of the world. Persian rose furniture in wood and wood colours is comparable to rosewood furniture. The use of modern technology to make purple and sour branches of Ming and Qing style furniture, more embody the solemn, majestic, rich, luxurious, product rarity and the glory of the times. Five long and short chairs made of purple rosewood, double bed, vertical finished combination wardrobe, bookcase-style Dabaoge, quaint and elegant, gorgeous and generous. Through the design of the craftsman, the technician's fine work, the engraver is fine, the lines are smooth, the strength is strong, the middle is soft, the carving is fine, the beautiful and calm color, and the luster. The folding screen has a furniture-independent style. The design is beautiful, the golden ratio is exquisite, the lines are very beautiful, the curves of the flowers are colorful and flexible, healthy and not hard, soft and not weak, clean and neat, moderate and moderate, and appreciate the classical style of the civilized country. The historical figures of the sculptures are complete in shape, vivid in appearance, self-conscious, static and dynamic, and extraordinary in nature. The Arhat chair with purple rosewood is clear and elegant. The purple rosewood has bright color, purple and transparent, and the color is prominent. This color is one of the folk traditions in China. The ancient and modern society regards purple as auspicious, and the purple character is composed in the first part of the word, and the effect is meaningful. "Zizhu Tune" is a world famous song; the gorgeous woman is called Ziwei, and the person and the name add together, meaning beautiful and noble. "Ci Hai" is a good word for purple, and it is good for both good luck and respect. Purple gas - like the gas of the Swiss; a book called the purple book. The clothes made of purple cloth are called "purple robes", as the attire of your official, even their relatives are vying to wear purple clothes to express themselves; the court gave the "邬波驮耶" 袈dress is also purple to respect the top; The name of the official summer is Ziwei, the middle of the book is Ziweiling; the purple official is the Taoist temple. The world is arguing for auspiciousness, and the fairyland strives for purple and enjoys happiness. Guanyin's self-cultivation is called Zizhulin; the heavenly star is called the Purple Palace, and the purple palace on the ground is the emperor's big house. The Ming and Qing emperors have a special liking for purple, and the hegemony is the old, the old Chinese rule center "the Forbidden City", Ziwei The emperor's patent, the people are forbidden to go to this city, the connection to the imperial city roots will not work, you can see the purple.
Liberation, the people are the masters of the country, and now they are wealthy and become God. Because of their hobby of furniture for the purple and sour branches and the Ming and Qing Dynasties, they are full of unique shops. They are generally complete sets of transactions, and some have several sets. Buyer. The purple rosewood products of this endangered tree species, long-lasting, high-quality furniture and other handicrafts, will become the treasures of Chinese and foreign collectors.
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