operational approach
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1, look at the shape. After the environmental protection paint is opened, a layer of resin floats on the surface. Perchloroethylene paint has a strong texture after mixing, and the bright paint is white and crystal clear. Matte paint is translucent and slightly turbid, without red, black and precipitation. It is straight and continuous when dripping. If inferior paint drips intermittently, there will be caking.
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2. Smell. Under normal circumstances, the smell of environmental protection paint is mild, elegant and pure; Inferior paint gives off a strong pungent smell or other unknown smell as soon as it is opened. At present, some inferior coatings also have fragrance. It may be that some unscrupulous merchants add spices to pass inferior coatings off as environmentally friendly coatings. This kind of paint has a pungent smell, but it is not as elegant as the real environmentally friendly paint.
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3. Find the test report issued by the business to the country, compare the parameters and compare who is the most environmentally friendly.
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1)VOC content. There are three types of effects of VOC on human body: odor and sensory effect; Pathological changes caused by mucosal irritation and other systemic toxicity; Some volatile organic compounds have been proved to be carcinogens or suspected carcinogens. The national standard for waterborne wall topcoat is VOC≤ 120g/L, waterborne furniture paint is VOC≤300g/L, and oily furniture paint is VOC ≤ 700g/L. From the national standard, waterborne paint is relatively more environmentally friendly. However, the actual VOC parameters will be different for a certain brand of products. For example, a full-effect alkali-resistant primer of Carpoly, whose VOC national standard is ≤ 120g/L, actually contains only 74g/L. Choosing the most environmentally friendly paint depends on the field comparison.
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2) Formaldehyde content. At present, the national standard value is ≤ 100mg/kg. Formaldehyde itself is highly toxic, has a strong coagulation effect on protein, can combine with amino and hydroxyl groups of nucleic acid to denature it, and can hinder the action of gastric enzyme and pancreatic enzyme, thus affecting metabolic function, and its vapor has carcinogenic effect on rodents.
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3) Heavy metal content. Heavy metals mainly refer to soluble lead, cadmium, chromium, mercury and other substances. Some heavy metals are essential trace elements in a certain concentration, but when they enter the human body beyond the tolerance limit, they will cause serious physiological damage and cause many diseases. Lead poisoning in children is more serious, and children have special susceptibility to lead. The content of heavy metals in children's paints is lower than that in general paints. For example, the lead content of Carpoly Happy Baby latex paint for children is only 1mg/kg, which is far lower than the national standard ≤90mg/Kg.
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4) Scrubbing resistance times. Scrubbing resistance mainly depends on the content and quality of emulsion, and this main raw material also determines the main properties of latex paint, such as scrubbing resistance, weather resistance, color retention and so on.
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(Note: The standard value will change depending on the type of paint. )
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4. Looking for China environmental label and 3C certification. If the manufacturer does not print the logo on the cans, he should also be required to show the corresponding supporting documents. It is worth noting that all environmental protection paints are equipped with national standard inspection reports and corresponding certificates. If he can't produce relevant certificates, it means that the paint is fake or not environmentally friendly.
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5. Look at the brand. When buying environmental protection paint, please choose a brand with good reputation and high reputation. The price may be higher, but the quality and sanitary performance are guaranteed. In order to prevent counterfeit brand-name products from being bought, it is recommended to go to the special dealers, specialty stores and large building materials supermarkets of well-known brands to buy them.
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6, packaging appearance and identification. The products produced by regular manufacturers are not only beautifully packaged and distinctive, but also marked with company name, address, production date, batch number, net content, high-quality paint, contact number and implementation standard. Everyone should look carefully to avoid being cheated by fake paint.
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7. Look at the service. Paint is only a semi-finished product. In order to obtain the ideal decoration effect, not only excellent product quality, but also good construction technology is needed. Alkyd antirust paint needs better service from manufacturers or merchants. Services usually include procurement guidance, cost accounting, technical consultation, construction guidance, quick solution to construction problems, and return visit after construction. For example, there are various precautions for paint construction in the product manual of Carpoly. www.yspaint.com
Special tips
1, whether the surface of furniture mixed with oil is smooth and saturated. Make sure there are no bubbles and cracks, and the paint thickness should be balanced and the color should be consistent.
2. The surface thickness of furniture varnish is consistent, and the paint surface is saturated, clean and particle-free.
3. Whether the surface of the wall latex paint is smooth and reflective, without hollowing, foaming and cracking.
4, wood and gypsum board ceiling coating is generally latex paint, should be smooth surface, plate joints without cracks.
5. Whether the corner joint of the ceiling is handled smoothly, and whether the polyurethane paint is obviously mismatched and deformed.
6. Whether the wall is free of pollution and dirt.