The hazards of poor quality plates are mainly due to excessive levels of various harmful substances, most of which are excessive levels of formaldehyde. For formaldehyde, the majority of consumers are not unfamiliar, many people are talking about formaldehyde discoloration. Formaldehyde is a highly toxic substance and it is also known as the first killer of indoor environments. According to scientific research, when the concentration of formaldehyde in the air reaches 0.06~0.07mg/m3, it will cause slight asthma. When the concentration reaches to 0.6mg/m3, it will cause throat discomfort, pain, nausea, vomiting, and cough. Even pulmonary edema and other symptoms; concentration reached 30mg/m3, it will cause death. Of course, there are other harmful substances in the poor quality of the plate, and the harm to the human body is very serious, such as benzene, hydrazine, ammonia and so on. These substances make inferior plates less harmful than poisons. What kind of sheet is a high quality sheet? There are many types of plates and various standards are also different. However, as a variety of different types of plates, they can meet the standards of high quality or quality. The content of harmful substances in plates meets the national standards, and the materials used in plates are excellent. And for these consumers, we may not be able to directly determine, but if the plate brand can be certified by some authorities in the country and even the world, then this is an important affirmation of the quality of the plate, but also allows consumers to feel confident about the quality of the plate. How to determine the quality of the plate? (I) Check whether the surface of the board has obvious flaws. The surface of the board should be smooth, free of burrs and grater marks, no glue penetration phenomenon, and board surface contamination (such as local blackening and yellowing). Try to pick the surface of the board without cracks. Cracks, cracks, no knots, sandwiches, resin capsules, and gum lanes, the entire board natural warpage should be as small as possible, to avoid the sanding phenomenon revealed by the substrate due to improper sanding process. (b) recognize the difference between veneer veneer and natural wood veneer veneer sheet The former plate texture is basically straight texture, texture patterns are regular; the latter plate is natural wood pattern, the natural variability of the texture pattern is relatively large, no rule. (C) appearance of the plate inspection Decorative plate appearance should have a good sense of beauty, material should be detailed uniform, clear color, wood grain appearance, the texture of the plate with the plate and the parquet should be arranged according to a certain rule, the color of wood is similar, patchwork and edge Nearly parallel. (4) The structure of the sheet glue layer is stable, and there should be no phenomenon of bulging or delamination between the veneer surface and the substrate, and between the internal layers of the substrate. (E) to choose the formaldehyde emission of a low plate selection of the more environmental protection plate, formaldehyde, the less harmful, in the wood board GB/T5849-2006 standard, formaldehyde emission: E0 level ≤ 0.5 mg / l. In the Japanese F4 star standard, the average value of formaldehyde emission is ≤ 0.3 mg/l and the maximum value is 0.4 mg/l. The above information, relevant Baoyuan plate supply information, plate purchase, etc. Please pay attention to the Chinese plate trading network Polyester Webbing Sling,Flat Webbing Sling,Polyester Sling,Synthetic Web Slings Guangdong Gongyou Lift Slings Machinery CO.,LTD , https://www.workmatehoist.com