Master the quality control and purchase of coating

2022-07-22
  • Detail

Paint, what we usually call paint, is just one of them. It refers to that coating on the surface of an object can form a film for protection under certain conditions

paint, which we usually call paint, is only one of them. It refers to that coating on the surface of an object can form a film for protection under certain conditions. In the 60 years since the founding of new China, with the development of various industries of the national economy, the coating industry, as a supporting industry, has gradually developed from a very unobtrusive small industry to an essential and important industry in various fields of the national economy. After several generations of hard work and pioneering spirit, China has become the world's second largest paint producer and consumer, and has entered the mainstream of the development of the world's paint industry. As for how to choose and buy, let me tell you in detail

has three main functions: protecting, decorating, and concealing the defects of products to enhance the value of products. In the 60 years since the founding of new China, with the development of various industries of the national economy, the coating industry, as a supporting industry, has gradually developed from a very unobtrusive small industry to an essential and important industry in various fields of the national economy. After several generations of hard work and pioneering spirit, China has become the world's second largest paint producer and consumer, and has entered the mainstream of the development of the world's paint industry

main components:

1 film forming substances are the main components of the film, including oil, oil processing products, cellulose derivatives, natural resins and synthetic resins. Film forming substances also include some nonvolatile active diluents, which are the main substances that make the coating firmly adhere to the surface to be coated to form a continuous film. They are the basis of the coating and determine the basic characteristics of the coating

2 additives, such as defoamer, leveling agent, etc., and some special functional additives, such as substrate wetting agent, etc. These additives generally cannot form a film, but they play a very important role in the formation process and durability of the base material film

3 pigments are generally divided into two kinds, one is coloring pigments, common titanium dioxide, chrome yellow, etc., and the other is constitutional pigments, which is often referred to as fillers, such as calcium carbonate, talc powder

4 solvents include hydrocarbon solvents (mineral oil essence, kerosene, gasoline, benzene, toluene, xylene, etc.), alcohols, ethers, ketones and esters. The main function of solvent and water is to disperse the film-forming substrate to form a viscous liquid. It helps to apply and improve some properties of the film. The coating can be divided according to the main film-forming substances used in the coating; According to the properties of paint or film, it can be divided into solution, latex, sol, powder, gloss, extinction and colorful art paint. They are oily coatings, fiber coatings, synthetic coatings and inorganic coatings

paint - Shopping Tips:

when choosing paint, look at the appearance. The coating with high viscosity and good wire drawing effect has better quality. Second, smell the smell. After the paint is opened, smell it close to the mouth of the tank. The smell of good quality paint will not be very exciting, and the taste will be lighter after use. If the paint is irritating after opening the can, it is best not to use it. In addition to color and gloss, the internal quality and environmental protection of coatings are the most important factors in the choice. In addition to eliminating the false and preserving the true, we should also pay attention to the use of auxiliary materials in construction, especially glue and primer, in order to achieve wall environmental protection. Even if you choose environmental protection paint, you can't be careless in substrate treatment. The primer of well-known brands can not only ensure the overall effect, but also is absolutely necessary from the perspective of environmental protection. In addition, we should also pay attention to the use of glue. 107 glue contains harmful substances, and the relevant national regulations have expressly prohibited its use in home decoration. 1. Try to buy in the formal market or exclusive stores that pay attention to reputation. When purchasing, you should also ask clearly what after-sales service measures the manufacturer has in case of quality problems. At the same time, you should ask its dealers to issue relevant bills and service cards to avoid problems without evidence. To see whether the exclusive store is really the exclusive field of a certain brand of paint, the reliability of a wide range of brands needs to be considered. Secondly, regular brand agents have a series of supporting documents. Before the salesperson introduces the products, it is best to verify their agent identity and look at the brand authorization documents. Usually, the staff of well-known brand franchise stores have received professional training, and have a certain understanding of their product characteristics, uses, coating dosage calculation and other related knowledge, which can answer many of your professional questions. You might as well ask a question first. If you don't even have simple coating knowledge, the credibility will be greatly reduced. 2. When purchasing, recognize the marks on the commodity packaging, especially the name of the factory, address, product standard number, production date, expiration date and product instructions. It is best to choose products from enterprises that have passed ISO14001 and ISO9000 system certification. The product quality of these production enterprises is relatively stable and there are no quality problems. 3. Buy products that meet the standard of gb18582-2001 limit of harmful substances in interior decoration materials and interior wall coatings and obtain environmental certification marks. 4. When shopping, pay attention to observe whether the commodity packaging container is damaged and expanded. When buying, you can shake it to check whether there is cementation. If there is any coating with these phenomena, you can't buy it. 5. Usually, most coatings cannot be opened on the spot to check the internal quality of products, so consumers must ask for valid vouchers such as purchase invoices and construction instructions when purchasing. 6. Before use, open the tank to check whether the coating has layering, bottom caking and cementation. If the paint is still in an uneven state after mixing, it means that the paint cannot be used, and it should be immediately negotiated with the paint manufacturer. 7. Coating construction is also a very important link, which should be carried out in strict accordance with the requirements of the product construction instructions. 8. The construction environment should be ventilated. If the product has special requirements for the construction environment, it must be carried out as required. In addition, the corresponding coating can be selected according to local conditions. For example, the coating with good pollution resistance, aging resistance and color retention should be selected for the room with a large flow of people, such as Lai Wei coating with strong pollution resistance and good color retention and nalte interior wall coating, which is especially suitable for the wall of the living room; According to the climate characteristics, the South should choose the coating with good moisture-proof and mildew resistance; In the north, the coating with good low temperature resistance and workability should be selected

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