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We usually identifyLarch wood pileMainly relying on the sensory judgment of wood color, smell and pattern, it usually takes many years of accumulation to be able to fully identify the wood type. Therefore, if you are not careful in the market, it is easy for traders to pass off inferior wood as good wood. The science of wood identification The main basis for determination is: the microscopic characteristics of the wood plus the density and macroscopic characteristics of the wood to determine the type of wood.

　　Larch wood pileIt can be divided into broadleaf wood (such as redwood) and coniferous wood (pine, fir). The structure of coniferous wood is relatively simple. The following characteristic pictures are mainly derived from broadleaf wood:

　　Larch wood pileIt is composed of many cells. Their shapes, sizes and arrangements are different, making the structure of wood extremely complex and becoming an anisotropic material. Therefore, sawing wood from different directions will have different cut surfaces. People use the cut surfaces Identify and study the characteristics of wood. Countless sections can be obtained by sawing wood from different directions. There are three typical sections, namely: transverse section, chord section and radial section.

The microscopic identification of wood mainly involves using a blade to cut the cross-section and chordal section of the wood (about 20 μm thick), staining it, making it into a glass slide, and observing it under a microscope or magnifying glass.

Tube hole: Refers to the hole shape of the tube on the cross section. The size of the tube hole is based on the chordwise diameter.

According to the arrangement of tube holes on the cross section, it can be divided into: diffuse hole material, semi-ring hole material, and ring hole material.

Single tube pore: In the cross section, 90% or more of the tube pores are completely surrounded by other molecules and are not connected to other tube pores. Such as water cyanide, etc.

Radial multiple tube holes: most or all of the tube holes are 2-4 or more arranged in a radial direction, such as basswood, etc.

Pipe hole chain: The pipe holes are arranged in a radial chain, but each pipe hole still maintains its original shape. Such as holly wood, etc.

Tube hole group: more than 3 tube holes are combined together to form a bird's nest shape. Such as the late wood of elm wood, etc.

Axial parenchyma: The concept is complicated, and it can be divided into scattered, scattered-aggregated, band-shaped, ring-shaped, wing-shaped, poly-wing-shaped, and wheel-shaped.

In addition, when we observe the structure of wood and understand the performance of wood, it can be reflected through three sections.

Cross section: The section obtained by sawing perpendicular to the growth direction of the tree is called the cross section. The cell tissue in the wood parallel to the direction of the wood grain can be seen on the cross section. It is the most important section for identifying wood. This section The board has high hardness and is wear-resistant. However, it is easy to break and difficult to plan.

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