China's wood-based panel production enterprises are numerous and widely distributed. The enterprises with a small scale have their own quality inspection departments and laboratories. There are also a large number of full-time wood-based panel quality inspection institutions. In the large provinces (regions) of several wood-based panel industries, there are full-time quality inspection institutions at the provincial, prefecture, city and even county levels. The sum of the quality of quality inspection of artificial boards implemented in China may be greater than the sum of all other wood-based panel producing countries. The large amount of inspection data obtained by this method provides abundant materials for scientific research work, and with the improvement of the quality of the quality inspection personnel. The accumulation of empirical knowledge and the ability to discover, analyze and solve problems in quality inspection work are also strengthening year by year. A few years ago, the amount of formaldehyde released from artificial boards was measured for the widely used perforation extraction method at that time. Many research reports have been published, which have played a very good role in how to correctly understand and implement the standard of the measurement method. The dryer method has become the most widely used and most popular method for the determination of formaldehyde emission in artificial wood panels due to its simple equipment, convenient operation, low detection cost and no toxicity to operators. There are several versions of the standard for this method. Japan's JAS and JIS each have a dryer method standard. After careful comparison, there are two differences that will affect the test results. The difference between the two is the number of test pieces and the pretreatment of the test piece. The rules of time are inconsistent. ISO, ASTM and GB/T also have a dryer method standard. The ISO and GB/T dryer methods are basically the same as JIS, but there are some subtle differences in data processing and specimen pretreatment conditions. The ASTM dryer method is very different from JIS, such as the number of test pieces, the time and temperature of the test piece placed in the dryer, the pretreatment method of the test piece, the size of the absorption dish, the volume of the absorption liquid (distilled water), and the test piece. Whether the edge sealing treatment or the quantitative analysis of the absorbing liquid is different from the JIS, ISO, and GB/T regulations by the chromotropic acid method, the detection result naturally cannot adopt the same limit value index. Since it seems that no one in the country has used the ASTM dryer method to determine the amount of formaldehyde released (the comparison test between the individual quality inspection units and the acetylacetone method), there has not been any dispute concerning the method. However, the dryer methods of JIS, ISO, JAS and GB/T are different due to different regulations, even if they are very subtle, how much influence on the test results? Is there any rule to follow? The test results of the dryer method and the use of the artificial board What is the corresponding relationship of environmental impact? At present, there are only a few senior quality inspectors who insist on the front line for a long time to judge. For this reason, the relevant research reports should not only stay on the list of some test data and simple analogy. Through theoretical analysis, a reliable mathematical model with sufficient basis is finally obtained to improve the readers' ability to recognize false and true. In view of this purpose, the author intends to provide the readers with the theoretical knowledge that has been determined by the senior experts and their own thoughts and thoughts, in order to inspire others. Two problems are discussed below: one is the mechanism problem of formaldehyde release from wood-based panels; the other is the absorption of formaldehyde by the absorption liquid (distilled water) on the artificial board in the state of the dryer. Carbide Drill Bit,Granite Tip Drill Bit,Ceramic Tile Drill Bits Tenyu Tools Co., Ltd. , http://www.dydrillbits.com