Why is the redwood national standard the current 33 kinds of wood?
We know that in the national standard of "redwood", the tree species in the "redwood" range is listed as "five genera and eight classes." This "five genera and eight categories" includes the current 33 kinds of wood. So some people said: Why are 33 kinds of wood, can't it be 23 or 43? Some woods, regardless of hardness and density, are even better than some of the woods listed in the current national standard, why are they not listed? Into the national standard? There are also suggestions that the current limit of 33 kinds of materials in the national standard is too large, should be further liberalized, expand the scope of the tree species contained in the national standard, and so on. Here, the author does not comment on these points, because that is not what I can manage. I only want to choose 33 kinds of materials for the national standard mahogany, and express some opinions. Because at the beginning, the author also had the same questions. Later, I went to the Chinese Academy of Forestry to consult Mr. Yang Jiaxuan, one of the main drafters of the "Redwood" national standard. He explained the author. The following is the general meaning of his explanation. Since I didn't bring the book at the time, I didn't make a detailed record. I made some sortings based on the impression, and I didn't review it. According to Yang Lao, it was a lot of trouble to determine which tree species were included in the standard. First, they went to the Palace Museum in Beijing to see the existing cultural relics, sample and identify, and see what wood they used. Second, go to the society to collect the existing ancient hardwood furniture and see what kind of wood is mainly used. The third is to investigate the current market and see which hardwoods are used. Also refer to the international evaluation and identification of high-quality hardwood, followed by a summary analysis. Further reading : Burmese rosewood refers to two kinds of wood are all redwood national standard Aggregate analysis is a very complex process that needs to be considered from multiple perspectives. We can see from above. It is from ancient times to the present, from the domestic to the international, from the court to the folk, and then queues the collected wood samples for comparison. This question is too professional, not the author can explain it, but the author remembers a few points: 1. The 33 materials currently determined are the main materials for hardwood furniture including the court, the folk, and so on. 2. It is still visible and still in use. 3. The international recognition and evaluation of such materials is relatively high. 4, selected wood, should be suitable for the production of high-quality mahogany furniture, for example, high quality, cracking to the ultimate will not be serious to affect the use, but also easy to repair. For example, Chinese traditional furniture is more carved, these woods should be applied to this process, and so on. 5, can reflect the high grade of Chinese mahogany furniture in the international. For example, the materials listed in the national standard of mahogany, the international evaluation of these woods is also very high, is a symbol of high-quality hardwood, so that the value of Chinese mahogany furniture can be reflected internationally. Then we can also analyze it backwards. Some trees look good. Even some aspects are better than some of the current 33 species, but they are not included in the national standard. Why? There are many reasons for this, but it also includes the following: 1, some kind of wood, hard density is good, but it loves cracking. (In the 33 kinds of materials in the national standard mahogany, it is not that it does not crack, but there are certain limits.) 2, some kind of wood, all aspects of the material is also good, but it is not suitable for carving. 3. Although the quality of this wood is not bad, the tree species currently have a small amount of existence, which is not enough to become a “commodity materialâ€. The meaning of commodity materials means that such wood has a large mining space and can be widely used in the manufacture of commodities for a considerable period of time. Extended reading : mahogany furniture is “buy in the store†or “buy in the warehouse†In short, it may be good in some respects, but if it is not good enough at some point, it will not enter the national standard. This is equivalent to saying that the timber currently included in the national standard is generally better in its "comprehensive quality". That is to say, from all angles, it can basically pass the customs, and it develops more comprehensively. "It is suitable for making traditional Chinese furniture." Another point is that some kind of wood may be good, but it is not recognized or has a slight remark on the international community, so it will not be included for the time being , so as not to reduce the international recognition of Chinese "redwood" furniture. Yang Lao also said as an example: Assume that the alternate timber rows are lined up and scored according to various conditions. There may be 100 points, or 70 points or 30 points. So, how many points are counted as passing (in the income of the mahogany standard)? If we count 60 points as a pass, then how do you count 59 points? 59 points and 60 points are only a little bit worse! Then put 59 points. It is also considered a pass, but there are 58 points and there will be opinions. Therefore, there must be a lower limit. This "lower limit" is some of the aspects mentioned above. Through some of the above analysis, we know that determining the current 33 materials as "standard" materials is also considered in many ways, and some problems are not thought of. At the same time, we also know that although some woods are not earned by the "national standard", it does not mean bad, good or bad, depending on which angle you are standing to analyze. For example, between 59 points and 60 points, is there any difference? But in any case, there will be a lower limit for the "standard", no way. Just like the son of a friend of the author, when I was admitted to the university, I only had one point and did not enter the admission line. Can you say that he is worse than the one who is one point higher? There is no way to do it! In response to a suggestion to expand the scope of the national standard, Yang Lao said that it is not necessarily impossible, and he explained to the author the feasible reasons. I understand this: for example, I found a new tree species, which has a considerable amount of existence and can be used as a commodity. The results of the appraisal are suitable for the production of traditional Chinese furniture. Moreover, this tree species has been recognized and praised internationally, in line with the international evaluation criteria for quality hardwood. Then it is a matter of course to revise the national standard and include it in the national standard. (The original "Chinese Redwood Classical Furniture" magazine) 13X4 Lace Closure,Human Hair Lace Wig,Front Wig Human Hair,Short Bob Wigs For Women Xuchang KANAZI Hair Products Co., Ltd. , https://www.kanazihair.com