Because of the stability of wood, the furniture has a long circulation time. Common hardwoods are rosewood, Huang Huali, wingwood and rosewood.

Red sandalwood: the most precious wood, with solid texture but slow growth, so most furniture is made of several tenons. If there is a whole board, it is quite precious and rare. Its color is mostly purple and black, which exudes a quiet and noble temperament.

Rosewood: Pterocarya stenoptera, a precious tree species with high quality and dark heartwood. The sapwood of rosewood heartwood is obviously different, and the sapwood is yellow-white to grayish brown; Heartwood is reddish brown, purple to purplish brown; The wood is uniform in color and has dark stripes, but the annual rings are not obvious or slightly obvious. Loose or semi-annular porous materials, single-tube holes, a few radial multi-tube holes, containing dark gum, deposits or fillers. The axial parenchyma is wing-like, wing-like, band-like, annular tube bundle-like and rim-like. Wood rays are extremely fine, mainly in a single row, and the radial markings are not obvious or slightly obvious, and the chord surface is wavy. Wood has luster, slight or obvious fragrance, staggered texture, fine and uniform structure, slightly coarse in some South America and Africa, strong corrosion resistance and durability. The material is hard and heavy, some are medium, some are medium, and some are high in strength. Generally, it floats in water, and the water of wood powder or sawdust fluoresces. Most of them appear on Ming-style furniture, with dense wood and colors ranging from light yellow to dark brown. Generally, the longer Huang Huali furniture is used, the brighter its color is, which is more suitable for modern space.

Chicken wing wood: solid texture, purple-brown texture. In modern times, their lines are smoother and new ideas are injected into the tradition.

Sour branches: Good sour branches are similar to rosewood, but the luster and color are slightly lighter, the color is warm and thick, and the yield is more.

Two. cork

There are many kinds of furniture and the prices are acceptable to most people. Many softwoods are also used with hardwoods. Such as beech, nanmu, camphor, pine and Chinese fir are all common cork materials.

1. Black walnut is the best walnut, mainly produced in North America and Europe. Walnut made in China is lighter in color. Black walnut is light dark brown with purple, and the cutting surface is a beautiful large parabolic pattern (mountain pattern). Black walnut is very expensive. Furniture is generally made of wood skin, rarely solid wood.

2. cherries. Imported cherry wood is mainly produced in Europe and North America. The wood is light yellow brown with elegant texture. The tangential section is a medium parabola with a small circle in the middle. Cherry wood is also high-grade wood, furniture generally uses wood skin, rarely uses solid wood.

3, beech, beech here refers to beech, and China traditional furniture "south beech and north beech" are two different things. Beech is bright in color, pale yellow, with dense "needles" (wood rays) and mountain-shaped patterns in rotary cutting. Beech imported from Europe has fewer defects and is much better than domestic beech. Imported beech wood belongs to high-grade wood in China and is often used as veneer. Solid wood is also used as dining chairs and cubes.

4, maple, maple is light yellow, with hills, the biggest feature is "shadow" (local luster is obvious). Maple belongs to the middle-grade wood, and the common ones are veneer and solid wood.

5. Birch Birch is light yellow in color, and its easy separation is characterized by many "waterlines" (black lines). Birch is also a mid-range wood, and solid wood and veneer are common.

6. Rubber wood, native to Brazil, Malaysia, Thailand, etc. Produced in Yunnan, Hainan and coastal areas, it is the raw material of latex. Rubber wood is light yellow, with messy rays, obvious annual rings, dark bands on the rim and few tube holes. The wooden structure is thick and uniform. The texture is oblique and the wood is hard.

Advantages: smooth section, easy adhesion and good painting performance.

Disadvantages: Rubber wood has an odor, and it is easy to change color, rot and be eaten by insects because of its high sugar content. Not easy to dry, not wear-resistant, easy to crack, easy to bend and deform, easy to process wood, easy to deform when processing plates.

7. Oak wood: heavy and hard material, rough structure, obvious wood rays, high mechanical strength, not easy to dry, process, resist loss and cementation, but good coloring performance and bending performance. It is often used as furniture face material and veneer.

8. Pine: no carving, clear texture, delicate lines, scattered fragrance and beautiful traces. The production process is demanding and needs drying and degreasing.

9. Catalpa bungeana: The wood is shiny, slightly thick in structure, slow in drying, not easy to warp, easy to process and strong in nailing.

10, elm: the wood is tough, the texture is clear, the hardness and strength are moderate, it can adapt to the general relief carving, the plane is smooth, the chord pattern is beautiful, and the "chicken wing wood" pattern. After drying, shaping, carving and polishing, elm can make exquisite lacquer carving crafts. It can be seen everywhere in the furniture market in the north. Elms and beeches produced in the south are called "beeches in the north". And the width of the fabric is large, and the texture is moist and excellent; The deformation rate is small, and the carved patterns are mostly rough. Elm can be divided into yellow elm and purple elm. Elm is more common, and the wood is pale yellow when it is newly cut, and its color gradually deepens with the growth of tree age; Purple elm is naturally dark purple, and the color of heavy elm is similar to that of old mahogany. The biggest furniture in the north is elm, waxed and painted.

1 1. Oak: Quercus acutissima of FAGACEAE, with yellowish brown to reddish brown nucleus, obvious growth rings, slightly wavy, heavy and hard. It is distributed from Jilin and Liaoning in the north to Hainan and Yunnan in the south, but high-quality oak is rare. Still have to import from abroad, high-quality wood is nearly 10 thousand yuan per cubic meter.

Characteristics of oak furniture: there are obvious mountain-shaped wood grains, and the surface feels good. European white oak has elegant texture, while North American red oak has mountain veins. Because oak is hard and heavy, it is difficult to remove water for processing.

12, Sabili (scientific name: Entandrophragma cylindricum) alias: mahogany, sapile mahogany; Distribution: West Africa, Central Africa and East Africa; Appearance: the wood grains are staggered and sometimes wavy, forming unique fish-shaped black stripes at the wood grains processed by the four-saw method; Medium porosity and high gloss; Sapwood is light yellow, heartwood is light red or dark reddish brown; Physical properties: moderate weight, bending strength, compressive strength, seismic performance, corrosion resistance and durability; Low toughness and steam bending performance;

Machinability: easy to process, although the surface may crack due to the staggered wood grains during planing; Good gluing, tenoning and nailing performance; The performance of surface treatment such as painting is good, especially after filling the pores with fillers;

Usage: It is similar to real mahogany in many application fields, such as: ordinary furniture, joinery furniture, decorative veneer, paneling, floor cabinets, wooden components connected indoors and outdoors, door and window frames, doors, stairs, ships and other means of transportation and piano panels.

13, Fraxinus mandshurica: hardwood, commonly known as Fraxinus mandshurica, is one of the three rare tree species in Northeast China, with slightly hard material, beautiful patterns, good corrosion resistance, good water resistance, easy processing, high toughness, cementing paint, good coloring performance and good decorative performance. It is a widely used wood in decorative materials at present.

14. Cinnamomum camphora: It is found in all provinces in southern China, and is abundant in Taiwan Province Province and Fujian Province. The tree diameter is larger, the wood width is wider, the pattern is beautiful, especially it has a strong fragrance, which can drive away insects. China's camphor wood boxes are well-known at home and abroad, including suitcases, sleeping boxes (suitcases), top boxes and cabinets. Only tables and chairs are mostly in Beijing. In the old wood industry, camphor wood is divided into several types according to its shape, such as camphor, camphor tree, camphor tree, camphor tree, camphor tree, camphor tree and so on.

15, yellow pineapple: its wood is shiny, the texture is straight, the structure is rough, the annual rings are obviously uniform, the material is soft, easy to dry, the processability is good, the color pattern is beautiful, the paint and adhesive properties are good, the nailing force is moderate, and it is not easy to split; Good corrosion resistance, used for high-grade furniture and plywood.

16, poplar: commonly used wood in northern China, soft, stable, cheap and easy to obtain. In ancient furniture, it is often used as the accessory of elm furniture and the fetal bone of lacquer furniture. This is the so-called poplar, also known as "Populus simonii", which often has a piece of luster, so it is also called "satin poplar", not the kind of Su Yang, Populus euphratica and Populus euphratica introduced in the middle of this century. Poplar often has a "coquettish taste", which is lighter and softer than birch. On the other hand, birch has a slight fragrance and often has very fine brown-black water stains. This is the difference between the two.

17. Walnut wood: Lvliang and Taihang Mountain are rich in walnuts. Walnut is the first-class material for making furniture in Jin Dynasty, which has been polished by water mill and waxed. It will have a hardwood-like luster, delicate and asexual texture, easy to carve, and elegant and soft color. Its products are available in Ming and Qing dynasties, and most of them are excellent. Available and hidden. Its wooden features are only fine needle-like brown eyes and yellowish filiform annual rings. Weight and elm, etc.

18, willow eucalyptus: the material is moderate in weight, with straight or oblique texture, slightly coarse structure, easy to process and good bonding performance. There is slight warping and cracking during drying.

Wood has many uses, and I will list its uses as (40):

1.2 bed. Table 3. Fourth floor. Tea set 5. Washboard 6. Kitchen utensils 7. The eighth chair. Cup 9. Globe 10. Pencil 1 1. Baseball bat 12. Tumbler 13. Bookcase 65438. 7. ashtray 18. Photo frame 19. Book cover 20. Trash bin 2 1. Fence 22. Room 23. Block 24. Sweep rod 25. Window frame 26. Buddha statue 27. Wood blade 28. Hang clothes 29. Wooden handicrafts. Sedan chair 3 1

Composition: cellulose. What needs to be added is that cellulose is a kind of polysaccharide, which belongs to sugar and consists of three elements: C, H and O.

First, the land changed hands. The first round of land contract expires due to the death of the original contractor or the death of villagers or land managers.

The ownership relationship has changed, the land has changed hands, and the price of trees has not been agreed, leading to deforestation.

The second is policy mistakes. The first round of land contract expires, and the extension policies formulated by some places are inconsistent with the "big" of the central government.

The policy of "maintaining stability and fine-tuning" is inconsistent, which harms the interests of farmers and leads to deforestation.

The third is interest-driven. Wood processing plants in some areas have raised the purchase price, which makes some farmers only pay attention to the present.

Interests, only talking about economic rights, not talking about the obligation to protect the environment, cutting down trees or forests on the original land.

The Central Committee has repeatedly reminded that in the second round of land contracting, it is necessary to prevent deforestation. There are still some places

Or regardless of the overall situation, leading to deforestation.

I'm so tired. Thank you.