1. Screening material quality:
Intuitively, the finer the wood annual ring, the better the material is, because the fine growth ring means that the wood grows slowly. Simply speaking, the wood that looks less "bran" from the cut surface should be better wood.
2. Screening wood processing quality:
Uniform specifications, small error and good processing quality. You can first see from the wood as a whole whether the specifications are correct and neat without much error. Generally, the error of thinner plates should be less than 0.5-1mm; the overall error of larger specifications should not be greater than 2mm. Generally through the materials under the production line, the specifications are neat and basically no errors. However, the materials processed by hand have large errors, which will cause difficulty in construction. In addition, for planing materials, you also need to look at the quality of the surface planing, it is better to be smooth and natural.
3. Screening wood preservative stability:
The color change of the soaking water is the smallest, and the preservative has good stability. Take samples of different antiseptic woods (same specifications and same water content), and soak them in the same temperature and the same volume of clean water. After the same soaking time, observe the water color. The preservative with the smallest color change has the best stability. . This is not an absolutely accurate method, as preservative concentrations during processing can also vary widely. After the wood has undergone antiseptic treatment, the stability of the wood is greatly different due to the use of different preservatives. After pressure treatment, the stability in wood is also greatly different. Using preservatives that are not of high quality has no effect on the antiseptic properties of wood. Too much improvement would instead cause significant potential harm.
4. Screening the quality of wood preservative and pressure treatment:
The sapwood is fully immersed in the preservative, and the surface is clean and even. From the perspective of the wood cut surface, the quality of all the preservatives dipped into the sapwood is good, because the heartwood part of the tree species has natural durability, but most other tree species should generally be dipped into the preservatives.
5. Screening wood anticorrosive pressure treatment quality certificate: anticorrosive wood capable of issuing test reports with guaranteed quality.