Recently, Mr. Yao, who is about to refurbish, told of his troubles in selecting interior wall paints: The function of the paint products is too much, crack prevention, waterproof, alkali resistance, and mildew resistance, as well as additional functions such as net taste and formaldehyde absorption. The Purchasing Guide was awful and he was still in the fog. For this reason, he wanted to know if the various functions of the paint had any practical effect. It was not that he did not promote the “ultra-low VOC†paint and “not environmental protectionâ€. With his doubts, the reporter conducted a survey, and experts also pointed out that some of the paint's propaganda "is a gimmick."
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â—† The more features the more expensive
Recently, the reporter visited a number of brand paint stores on a certain building materials market in the Southwest Fourth Ring as a consumer. It was found that the interior wall paint functions advertised by the merchants were indeed more. Anti-alkali, waterproof, anti-crack, and anti-mildew are all functions covered by the wall paint that reporters see. Some of these products also have the additional function of odor absorption and formaldehyde absorption. Some products also claim to be formaldehyde-free, ultra-low VOC, or unattended to add VOCs, which can achieve the effect of instant brushing, which means that products are safer and more environmentally friendly.
The reporter learned that the price of paint also rose with the increase in product features. Taking a well-known paint brand as an example, the price of wall paint that absorbs formaldehyde is increased by nearly RMB 100 per barrel compared to low-cost wall paints that contain only basic functions such as alkali resistance, water resistance, crack resistance, and mold resistance.
â—† Shopping guides conflict with each other
What do these features mean? The introduction of the Purchasing Guide is confusing. What is the role of crack resistance? A brand purchase guide said that it could cover the small cracks on the wall; the shopping guide of another store of the same brand said that the paint was flexible and could prevent cracks on the wall of the hair after a period of use. The interpretation of the net taste function is even more different. Introduced by a certain brand of shopping guide, this means that the paint itself is tasteless, that is, it can live immediately. The shopping guide for another store of the same brand said that net taste means that in addition to the paint itself, it can also absorb the odor produced in other parts of the room, that is, absorb formaldehyde. However, when a reporter asked whether the odor emitted by the paint itself was toxic, it needed a clean smell. Shopping guide only vaguely answered one sentence: "No, no." It will no longer answer.
In another brand shop, when reporters expressed that they were very interested in the recent advertisements on television, which had the function of removing formaldehyde, the guide instead recommended a product with no such function and cheaper, and told reporters: "In fact, the function and composition are the same. It doesn't help to see the propaganda."
Although some Purchasing Guides themselves do not think that some products have special features, but a few paint stores visited by the reporter have clearly stated that they can provide test reports that prove the product's functions, and they can also copy test reports and products when purchasing products. The certificate is also given to the reporter.
â—†Confused buyers pay
How do consumers see and choose for the many functions of coatings? The reporter interviewed several consumers who were choosing paint. When asked how to choose paint products, the consumer Mr. Zhang said that he paid more attention to the actual performance of the wall paint on the wall, such as whether crack resistance, etc., so "listen to guide the introduction of crack prevention and other functions are good, just Bought".
Ms. Zou, a consumer, said that she saw advertisements often promoting the odor function, and many products also promoted the absence of harmful substances such as formaldehyde and VOCs. “I feel that wall paint actually contains many harmful substances. To be safe, buy it with a clean smell. The function is good, after all, the use of wall paint is so large. For health, your points are worth!†The reporter also learned that several consumers interviewed did not think that they should ask for relevant inspection reports to verify the performance of the paint.
â—†Industry: Detailed basic functions
What is the practical significance of these basic functions of paint for home improvement projects? Need these features in home improvement projects? The reporter asked a senior engineer working on a wall paint brand to answer these questions.
Waterproof: The most important performance of the waterproof performance is to use a semi-wet rag to wipe the paint, and poor waterproof paint will fade. If the paint is applied to places where the water vapor is heavy, such as kitchens and bathrooms, the water resistance can prevent the wall paint from dusting.
Anti-alkali: It is very important that the coating has anti-alkali, because the concrete material of the wall is very alkaline, and anti-alkali will appear after painting the wall paint on it so that the wall paint will change. Although the wall surface will be treated with a putty, the waterproof putty used now is also highly alkaline with a pH value of 10 or more, so the anti-alkali function is very necessary.
Anti-mildew: Although the north is relatively dry, mildew in the wall can also occur under certain conditions. For example, there is a phenomenon of condensation on the wall, in the humidity of more than 70%, the temperature reached 25 °C when the mold will appear. The use of wall paints with mildew resistance on such walls can reduce the chance of mildew, but it cannot be completely eliminated.
Crack resistance: The main defense is the cracking of the paint surface due to shrinkage, which should be the basic function of a qualified product. As for coatings with crack resistance, which can cover small cracks on the wall, the person in the industry pointed out that this function is mainly reflected in the secondary renovation of old houses, and can cover up very minute cracks without completely removing the putty layer. Live, but it can play a very limited role. In the new house renovation, the wall completely re-treatment, this performance of anti-crack paint will be of no use.
â—† consumption tips: buy products to see the test report
How can we buy a reliable coating product? Tang Yueqing said that currently the quality of interior wall coatings on the market is generally good, and the sources of main raw materials of all manufacturers are basically the same, and the formulas are similar, so long as they are brand coatings, the quality of products is mostly guaranteed. However, he suggested that consumers should check the test report before purchasing it. "Untested products are not allowed to enter the circulation field. Businessmen are also obliged to provide consumers with appropriate inspection reports to prove the quality of the product is a pass." Zheng Sujiang also said that for products with antibacterial and other functions, but also to check the test Report, speak with tangible experimental data.
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