The logs have just been cut down to "bubble" for 2-3 years? So, what is the role of logs in soaking water?
Previously, the industry had put forward the saying that “the old man cut down the logs in the old age and put them in the pond for 2-3 yearsâ€, and there are different reasons for the reasons.
Due to the divergence of ideas between the masterpieces and the masters, there are currently three reasons for the "water soaking" of logs:
First, enhance pest and disease resistance: Some wood contains sugar, eggs, strains, through the flooding, and some also add chemicals in the water to inject anti-corrosion to the wood itself. After soaking in water, the fish is removed and the ends are sealed and dried, which can help the wood's corrosion resistance. Some netizens have suggested that the hardwood core material of the mahogany is itself uncomfortable with eggs, and this treatment is a bit of a superfluous addition.
Second, in order to preserve preservation: This reason is the most popular saying on the Internet recently. The general meaning is to use the external factor to make the water content higher than the fiber saturation point, so that the wood does not shrink or expand completely, and the shape maintains the largest size and volume.
Third, the old experience taught by the master: Chinese people are always "myth" and some "experience talks." Since the craftsmanship of the traditional carpenters was inherited by the masters and apprentices, perhaps only at the beginning, they followed the teachings of Master, and later they took this step as a "rule", which was passed down from generation to generation to become a convention.
There are divergent answers, no professional conclusions, all folklore. To get together, the most common statement is the second: to prevent cracking and deformation, that is, to "de-sex" (release internal stress).
So, is this really true? Effect of water content on wood expansion and contraction
The effect of wood moisture content on expansion and contraction occurs from the “fiber saturation point†to the “dry wood†stage. The fiber saturation point refers to the water content of the wood cell wall when the water content is saturated and the cell cavity has no free water. In the professional field, 30% is usually used as the average value of the water content of the fiber saturation point of each tree species. The fiber saturation point is the turning point of various wood properties such as density, strength, toughness, and anti-caries.
Note: The amount of moisture in a growing or newly felled tree varies with the species. Generally, the water content in trees is between 40-100%, more than 200%, and individual trees can reach 300%.
When the water content is higher than the fiber saturation point, no matter the weight increases or decreases, the wood has no shrinkage or expansion at all, and the shape maintains the largest size and volume. Below the fiber saturation point, the wood volume increases or decreases as the moisture content increases or decreases. The more the moisture content decreases, the greater the wood shrinkage rate, and when it is dry, it shrinks to the minimum size.
It is known that wood does not expand and contract when the wood is above the fiber saturation point. That is to say, internal stress has not yet occurred. The internal stress (woodiness) is caused by the difference in the anisotropy of the wood (anisotropic).
Log water is an advantage for preservative preservation, but it can only be temporarily preserved. The stress in the new cut to the fiber saturation point (water content 30%) has not yet appeared, and there is no "de-sex". What is the essence of that water? Wood is terrible, with deformation, cracking and warping, which can occur at different stages. Therefore, it is these craftsmen who are simple and blindly "adhering to the ancient system", or are they really ignorant?
Of course, no matter what the reason is that the craftsmen will "soak" the wood, it is certain that if the moisture content in the wood is too large, the articles sold after the finished product will inevitably have quality problems such as cracking and deformation. Therefore, no matter whether there is any “water soaking†beforehand, the wood needs to be dried before it is made.
The drying of the wood solves the phenomenon that the furniture joint is loose or the board surface is cracked due to the uneven swelling and shrinkage of the wood, the stability of the mahogany furniture structure is ensured, the natural texture of the wood is maintained, and the appearance is beautiful, and then appropriate The carvings not only make the mahogany furniture have a natural beauty, but also provide the "reassuring pills" for the mahogany furniture consumers.
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