At present, preservative wood is still a relatively new product. It's really a difficult problem for consumers who have just contacted how to identify their quality. Here's a method to help customers make their own choices in a simple way.
A simple method to identify the quality of pineapple preservative wood (not bran is better) from the visual point of view, the finer the wood ring, the better the material is generally, because the wood growth is slow. In short, the wood with less bran should be better wood from the section.
The method of discriminating wood processing quality (uniform specification, small error and good processing quality) can first see whether the specification of wood is correct and neat without too much error. Generally, the error of thinner wood should be less than 0.5-1 mm; The overall error of larger size material should not be greater than 2mm. Generally, the material under the production line is neat and has no error. However, the material processed by hand has large error, which will cause construction difficulty. In addition, for the planing material, you also need to look at the quality of the surface planing. Smooth and natural is better.
3. The method of screening the stability of wood preservatives (the color of soaking water changes little, the preservative stability is good) take different preservative wood samples (the same specifications, the same moisture content), respectively soak in the same temperature, the same volume of water, after the same soaking time, observe the color of water, the color change is small, the preservative stability should be good.
This is not an accurate method, because the preservative concentration may vary greatly during the treatment. After preservative treatment, the stability of wood varies greatly due to the use of different preservatives. After pressure treatment, the stability of wood also varies greatly. The preservative with poor quality does not greatly improve the preservative performance of wood, On the contrary, it will cause significant potential harm.
4. The method of screening the quality of wood preservative pressure treatment (sapwood is fully immersed in preservatives, the surface is clean and uniform is better) for Pinus densiflora, from the perspective of wood section, the quality of sapwood immersed with preservatives is better, because the heartwood part of the tree species has natural durability. However, most other tree species should be immersed in preservatives.