Coating knowledge: the thickness control of coating film is very important

Core tip: [news] no matter what kind of substrate is coated, some professional painters don't realize the importance of proper coating rate This is because it is usually possible to paint at a higher rate of application and achieve a consistent appearance, especially when the primer color is similar to the applied color For example, a painter may feel very good about painting 12 square meters per liter of paint, and at the same time get a good appearance However, if 10 square meters per liter is the coating rate recommended by the coating manufacturer, the coating rate of 12 square meters per liter will lead to Paint knowledge how about Akzo Nobel Powder Coating Recommended introduction: powder coating is a kind of coating with different form from general coating, which is in powder form It is a new type of coating, because of its own advantages and more and more known by people Let's introduce Akzo Nobel Powder coating Akzo Nobel Powder coating is a cost-effective coating solution, which can be applied to different kinds of products After the treatment of static electricity and fire baking, a tough and durable coating surface will be formed, with the least impact on the environment Since the introduction of this technology, powder coating has been able to continue to maintain the Paint Home News: [news] no matter what kind of substrate is painted, some professional painters don't realize the importance of proper coating rate This is because it is usually possible to paint at a higher rate of application and achieve a consistent appearance, especially when the primer color is similar to the applied color For example, a painter may feel very good about painting 12 square meters per liter of paint, and at the same time get a good appearance However, if 10 square meters per litre of paint is the coating rate recommended by the coating manufacturer, coating at 12 square meters per litre will result in a dry film thickness of only 80% of the recommended thickness No matter how beautiful the appearance is, too thin a dry paint film will have a negative impact on some key properties of the paint, and all these properties will affect the final quality of the project Take mildew resistance as an example High quality latex paints have better mildew resistance than economical ones because they usually contain more mildew inhibitors, an ingredient used to inhibit mold growth However, if you apply the paint too thin, you will minimize this benefit of the film, because the thinner coating contains insufficient growth inhibiting additives The thicker film can not only provide the mildew resistance of the coating, but also help to prevent fungi from getting nutrients from the substrate The negative effects of too thin coating on the performance of coatings can also be shown in many other ways, including: impact on cracking resistance - the cracking resistance of coatings is directly related to the film thickness after drying This is particularly important for the painting and renovation of outdoor wood Poor hiding power - the paint cannot completely cover the surface, so the past color or pattern will appear through the paint film Once the paint film is eroded due to weather or cleaning, the problem will become very obvious Poor cleanability - necessary cleaning to remove dirt or stains may damage some paint films, especially on flat paint films Therefore, the cleaning resistance of thin film is not as good as that of thick film formed by the same coating Poor fluidity and leveling - brush and roll marks are evident on dry film A thick coating provides better fluidity and leveling Final durability of outdoor painting works - in the same case, thin film is more susceptible to erosion than thick film Uniformity of Gloss - too thin a coating film can damage this important property The primer will also be affected The problems caused by not following the specified coating rate are not only limited to the coating, but also the primer will be affected This is because the primer coating too wide will also lead to the drying of the film is too thin, which in turn weakens its main performance As for primer, the main properties affected by coating rate are: cracking resistance, covering power, mildew resistance, consistency of finish gloss, as well as stain sealing and corrosion resistance according to different properties of primer So take some time to measure your painted surface to calculate its area Then roughly determine the number of coats, colorants and / or primers required to apply the entire area in liters Whether you paint by spraying, rolling or brushing, you should try to paint the surface with enough paint The recommended coating rate is determined by the condition of the surface to be coated (smoothness and porosity) and the specific coating used For the very rough exterior wall surface, such as the rough cement surface, the coating area per liter is about 3.6 to 5 square meters, while for the smooth surface, such as the closed concrete casting surface and the smooth wooden surface with primer, the coating area per liter can be 10 to 11 square meters Whether you are contracting for indoor or outdoor works, always apply the coating and primer according to the coating rate recommended by the manufacturer In this way, a thicker, more protective and longer lasting paint film can be obtained Home of coatings is specialized in coatings, diatom mud, paint coating, coating technology, fire retardant coating news and coating, diatom mud, paint coating, coating technology, fire retardant coating decoration knowledge and decoration renderings,