Most of the walls after scraping porcelain need to be brushed latex paint, brush latex paint can reach the decorative effect can not be achieved. Latex paint is divided into primer and topcoat. Some of the decoration is not brush primer, brush the paint twice directly. If you plan to decorate your new home, don't you know if you know enough about coating? What is a latex paint primer ? Latex primers are coatings that are applied directly to the surface of an object as a base for topcoats. It is required to adhere firmly on the surface of the object to increase the adhesion of the upper coating and improve the decorative properties of the top coat. Latex paint is a kind of water-dispersible paint, then wall paint latex paint in the end do not need to brush primer it? What does the brush primer do? Here is the answer to reveal with me. What are the effects of latex paint primer? One of the biggest features of the primer is its sealability and alkali resistance. Why the wall has alkaline substances? The reason is that the main component of the wall putty powder is Caco3 and the water molecules in the air combine to produce basic substances. CaHO2, its harm lies in that if the ubiquitous phenomenon is serious, the color wall will make flowers; Anti-mildew principle: The sealability of the primer can make the wall base not wet, and keep it dry. Since the mold is then how it breeds, the principle of anti-mold and waterproof is the same. The function of the top coat is mainly reflected in the latex. The exquisite degree of paint film and anti-powdering ability, covering the elasticity of fine cracks (the latex paint has more emulsion components, the better the anti-powdering ability and the ability to cover fine cracks; fine or not depends mainly on titanium in latex paints. White powder and heavy calcium carbonate, light calcium carbonate and talc powder ratio and fineness; The cost of latex paint is based on this principle.) In general, latex paints have stronger primers than topcoats, but they are less elastic than topcoats. Closed primers for moisture are better than topcoats. The impact on construction mainly includes the following two points: 1. For the construction of a wall with a primer, due to the sealing of the wall by the primer, the moisture cannot enter the wall when the paint is applied on the upper surface, and the phenomenon of falling occurs easily, which increases the difficulty of construction; 2, because the primer has a good sealing, if the wall putty is not very dry during construction, so that the water can not be distributed out, it is easy to crack the problem; and if there is no primer on the water through the surface The paint evaporates; so the primer will increase the construction time and difficulty; 3. Although the primer has increased the material cost of the primer, it will also reduce the amount of topcoat used, and the overall cost will not increase too much; 4, not on the primer does not necessarily cause the wall to produce mold, because the environment will be very different. According to the function, the paint is generally divided into four kinds (from bottom to top): closed, primer, middle coating, topcoat. Closed: used for wood substrate, closed isolation effect. Primer: Fill and increase thickness and other functions such as rust prevention. If it is latex paint, it has the effect of alkali and mildew. In the coating: increase the thickness, more common in floor paint, and some other special functions, such as anti-static. Topcoats: decorative and aesthetically pleasing, surface decorative and protective and wear-resistant. Latex paint is divided into primer and topcoat. The primer has anti-alkali and plasticizing effects. However, it is not necessary to use primers. This is mainly from the economic point of view. The primer is generally used in conjunction with high-grade topcoats, and if low-end finishes are used, there is no need for primers. The primer is more expensive than topcoats. Is it necessary to use a primer? Too bad, but also does not reflect the benefits of brush primer. What is the difference between latex paint and topcoat? Latex primers are coatings that are applied directly to the surface of an object as a base for topcoats. It is required to adhere firmly on the surface of the object to increase the adhesion of the upper coating and improve the decorative properties of the top coat. According to different coating requirements can also be divided into the first primer, second primer and so on. It is the first layer in the coating system. It is used to increase the adhesion of the top coat, increase the fullness of the top coat, provide alkali resistance, provide anti-corrosion function, etc. At the same time, it can evenly absorb the paint and make the latex paint system play the most. Best results. Some people think so. If the paint quality of the latex paint is too high, it is not necessary to use a primer. This idea is completely wrong. The reason is that the finish of the latex paint is different from that of the primer. The top coat is more focused on the final decoration and appearance. The most important role of emulsion paint primer is to increase the viscosity of latex paint, anti-mildew, anti-alkaline wall function. Editor's summary: The above is the difference between latex paint primer and topcoat. Home decoration paint selection skills: A look at the relevant introduction of the second and third hands, hoping to help meet the needs of the friends! 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The difference between a latex paint primer and a top paint Home improvement paint Buying tips: A look