Analysis of the growth, crack and hollow problems of red sandalwood

The lobular rosewood grows slowly, and there is a saying: a hundred years of tan. We can count the annual rings on the cross section of the rosewood. For woods that can be seen clearly by the annual rings, there are typically three to five annual rings in the diameter of each millimeter. That is to say, 1 cm needs to grow for 30 to 50 years, and each inch needs to grow for 100 to 160 years. The red sandalwood wood we see is about 10 cm in diameter, usually 20 cm above and below, and more than 30 cm, but very few. For a 20 cm diameter sandalwood, it should have been grown for at least three hundred years, and it may be five or six hundred years. (By the way, the growth rate of sea yellow is not faster than that of red sandalwood. The dark stripes of sea yellow that we often see are not actually their annual rings, and the actual annual rings are much denser than these stripes.)

The above is the general situation of the old red sandalwood, that is, the wild forest. For plantations? Many people mention plantation forests, and they always feel that they have been planted in the last 20 or 30 years to pursue economic benefits. However, according to the annual ring, we know that the “plantation forest” that has already become mature is at least 150 years old, and it may be 300 years or more. I don't know if Indians of that era would cater to the interest of the Ming and Qing dynasties to plant red sandalwood trees, but the possibility is too small - after all, it will take two hundred years to grow, and the grandson's grandson will not be there. Know where it is. My feeling is that because the rosewood is especially suitable for building furniture and building houses, the Indians planted the batch on the hillside from time to time after the wild resources were exhausted. They did not manage it like the orchard, but let it go its own way. . It is a bit similar to the predecessors who planted trees and enjoyed the cold.

The seedlings of red sandalwood are not purple heartwood. Only when they grow for a certain period of time, the heartwood will gradually turn purple (of course, the fresh red sandalwood is orange-red), and its essence is the accumulation of red sandalwood. The texture of the excellent red sandalwood, the feeling is pure rosewood, pressed, almost no feeling of wood fiber, carving and polishing when the texture is similar to nephrite. The so-called old red sandalwood is fine, or there is no brown eye. The reason should be that many brown eyes are filled with red sandalwood, so it is not visible. For the same reason, many of the old rosewood's annual ring line is almost invisible due to too much red sandalwood. The density of the rosewood is higher and the density of the wood fiber is smaller. Therefore, the old red sandalwood containing red sandalwood has a relatively high density, and may exceed 1.3 after drying. The new material red sandalwood has a shorter growth time, and the time for accumulating the red sandalwood is less than one or two hundred years, so the density of the wood is low. . Therefore, only wild rosewood with slow growth and long growth cycle can be called old red sandalwood. After the new red sandalwood is cut down, even if it is dried for decades, the density and the content of rosewood will not change.

Related reading: Introduction of traditional new and old rosewood furniture judgment and recognition knowledge

Next, talk about the water content of the wood and the problem of cracking. Obviously, when the wood has just been cut down, there will be a certain amount of water content, so the density (in this case, the physical density, that is, how many grams per cubic centimeter) will be slightly larger. After a long period of dryness, the water will be lost. Dry materials are suitable for processing. In the process of dryness, many woods will have more or less cracks, which is caused by the internal stress changes of the wood during the dehydration process and is difficult to avoid. The red sandalwood material that has been placed for many years is not cracked, but the cracked part has been cracked. The part that has not been cracked has reached the internal stress balance, and the finished product is less likely to crack again. We can see that some polished sandalwood wood has flame marks on the surface. These lines are caused by cracks on the surface of the wood. The part under the crack is oxidized faster and becomes purple-black. Therefore, even if the crack is worn away after grinding, the oxide traces under the crack. Still.

Finally talk about the hollow problem. It is said that it is ten sands and nine empty, the actual proportion may not be so much, but it will not be less. The reason for the hollowness is also easy to understand. Isn't the tree old? This is a good statement, but the hollow of the rosewood also has its special reason. First, when there is a hollow tendency, the most central part has grown for more than five hundred years. Secondly, as long as the rosewood tree is alive, it will always produce the rosewood and store it in the trunk. Therefore, the conduits of the heartwood near the center will be filled with the sapphire (and sometimes the mineral crystals of Venus), slowly becoming more and more compact, and because of this, they are rooted, The connection of the leaves will slowly break. It is like a fruit, and once the nutrient supply is stopped, they will slowly rot. Of course, this hollow process of red sandalwood is very slow and should start from the roots.

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