Some home gods and men advertised to their netizens some methods for verifying the quality of products or environmental indicators for the home environment. Do these methods of self-testing that lead the way and grab the limelight of professional organizations really do it? In this regard, we invite experts to enlighten the owners.
Recently, the reporter found that many owners have begun to test the quality of floor self-examination. Some immersed flooring samples in water for more than 30 days, and some of them destroyed the surface of the floor sample and examined the substrate. Are these seemingly extreme and violent self-test methods really useful? Please look at the experts one by one.
Self test method 1
The surface of the floor sample was destroyed with a kitchen knife to expose the substrate inside. Home God man said that the color of the substrate should be the color of the original wood, too white is washed, too dark, indicating too much impurities.
Expert Comments: What should be the color of logs? There are many species of trees as the substrate, and there are great differences in their colors. What is called white and what is too dark cannot be used as a basis for distinguishing between good and bad materials.
Self test method 2
The substrate was dripping and allowed to stand for a while. It was found that some substrates will completely inhale the water, while some will remain the same. This shows that the density of the base material with constant water droplets is large, while the texture that is quickly absorbed is loose.
Expert Comments: The speed of water absorption in this experiment is not directly related to the density of the substrate, but is related only to the water absorption of the substrate.
Self test method 3
After immersing the floor sample in water for a period of time, some of the sample solution will darken. This indicates that there are many impurities in the floor, and it is not a good product.
Expert Comment: Due to the different types of substrates, the solution may have different colors after soaking. For example, in the North, deciduous wood will be used as a base material. These tree species will have a darker color. In the South, poplar and pine wood will be used as materials, and the color will be relatively light. Therefore, using this method to infer product quality simply does not hold water.
Self test method 4
Some samples will sink after immersing for a period of time, indicating that the product is of poor quality and is too absorbent.
Expert Comments: This does indicate that the sample floor is relatively absorbent, however, the purchase of floor depends on the comprehensive indicators. In the case of other indicators with the same conditions, low formaldehyde content laminate flooring products, water resistance is rather poor. On the contrary, the formaldehyde content is high and the water resistance is slightly stronger.
Self test method 5
The floor samples were immersed in water (35 days) and the coefficient of expansion of each sample was measured. The more swelling, the more loose the interior proves that the stability is worse. Then, the sample was dried in the sun, and warping and breaking occurred in poor quality. Excellent products will return to their pre-immersion state.
Expert Comments: This experiment does not make sense at all. In the national standard, the test requirement for the coefficient of expansion of the water-absorbing floor is to soak for 24 hours, and the temperature is guaranteed under the condition of 20°C±2°C. The water-absorption expansion rate can be less than 18%. The test exceeds the normal floor tolerable range, so the results are not worth adopting.
Self test method 6
Put the sample into sawdust, add hot water to soak for a while, such as smelling a pungent odor that the formaldehyde level of the floor exceeds the standard; smelling the woody taste is a good environmental protection floor.
Expert Comments: There is a pungent odor, it may be formaldehyde. However, judging whether the formaldehyde content exceeds the standard is subject to the test report.
Self test method 7
With the anti-theft door key scraping back and forth several times on the floor surface, there was no obvious trace on the floor surface, which proved that the wear layer of the floor is very thick, and there is no need to worry about the flaws in use in the future.
Expert Comments: The national standard has scratch resistance test on the surface of the floor. The scratch resistance test shows that the density of the base material of the floor is relatively large. It proves to some extent that the scratch resistance of the floor is better, but this does not It also proves that other physical and chemical conditions such as floor wear resistance also pass.
This kind of experiment is best to do comparative experiments between several floors of the same level, and use the same force test to explain the problem. In addition, even if the product is scratched with a key, it cannot be proved that it can be used without fear.
Self test method 8
Pour some water into the two spliced ​​seams. After a while, it was found that the water did not infiltrate. Separate the two floors and find no traces of water in the floor trough. This proves that the water resistance of the floor is very good.
Expert Comments: The national standard in the water resistance of the floor also has relevant regulations, to do this experiment can prove to a certain extent the water resistance of the floor is better - if the floor is exposed to water, soon absorb water, swelling or even deformation, it shows Its water resistance is relatively poor. However, this kind of experiment must carry on the contrast test between the same environmental protection grade floor, the result only has the reference value.
Products with high environmental protection levels will have relatively poor water resistance. Because laminate flooring requires the use of formaldehyde during the gluing process, the amount of formaldehyde used affects the density of the substrate. Therefore, products with high environmental protection grades have low formaldehyde content, slightly loose substrates, and poor water resistance. Therefore, if the E1 grade product is compared with the E0 grade product, although the former has poor environmental performance, the water resistance performance will be better than the latter.
Self test method 9
Writing on the surface of the floor with a pen and then wiping it off with a damp cloth can prove that the floor has good stain resistance.
Expert Comments: National standards have a clear definition of this performance. For example, some floor surfaces have some pores that cause the floor to become dirty and not clean, so the floor's anti-pollution performance is unacceptable. However, using a pen to scratch a few lines on the floor does not prove how good the flooring is. If you want to do this experiment, consumers can use a dirty rag to repeatedly wipe the sample floor is very dirty, and then wipe it again the next day with a clean rag to see if it can be wiped clean, a few net shows that the floor anti-pollution ability pass.
>>Expert point of view: should pay attention to comprehensive indicators
Wang Jun, an expert member of the China Forest Products Industry Association, recommends that consumers choose a floor and need to consider their comprehensive indicators comprehensively. Not a few items perform well, and the floor even passes. In fact, consumers do not need to spend a lot of time to do a variety of experiments. When they purchase, they only ask for the product's recent test report and understand the product's overall situation. In addition, Wang Jun also reminded that returning visits to recent customers is the most direct and effective way to understand the product situation. Consumers can decide whether or not to purchase after they have a comprehensive understanding.
In addition, the purchase is only the first step, and proper installation and proper use and maintenance are also essential. Many floor-to-floor disputes are caused by improper installation or use. If the installation must be done to prevent moisture and other measures. In addition, consumers should use and maintain the floor strictly in accordance with the product specification. For example, the indoor humidity is controlled between 50% and 80% to prevent deformation of the floor, and a non-drip mop is used for cleaning.
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