Pay attention to the thickness and thickness of th

2022-07-22
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No matter what kind of substrate to paint on, some professional painters did not realize the importance of brushing the appropriate coating rate

no matter what kind of substrate is coated, some professional painters do not realize the importance of brushing the appropriate coating rate

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this is because the paint can usually be applied at a higher coating rate, and a consistent appearance effect can also be obtained, especially when the primer color is similar to the painted color

for example, a painter may feel very good about painting 12 square meters per liter of paint, and also get a good appearance. However, if 10 square meters per liter of paint is the coating rate recommended by the paint manufacturer, the thickness of the dry paint film will only be 80% of the recommended thickness after painting at the coating rate of 12 square meters per liter

no matter how beautiful the appearance is, too thin dry paint film will adversely affect some key properties of the paint, and all these properties will affect the final quality of the project

performance quality is damaged

take mold resistance as an example. High quality latex paint has better mold resistance than economical latex paint, because they usually contain more mold inhibitor, an ingredient used to inhibit mold growth

however, if you apply the paint too thin, this benefit of the paint film will be minimized, because the thinner coating contains insufficient growth inhibiting additives. The thicker paint film can not only provide the mildew resistance of the paint, but also help prevent fungi from obtaining nutrients from the substrate

the negative impact of coating performance caused by too thin coating will also be shown in many other ways, including:

impact on cracking resistance - the cracking resistance of the coating is directly related to the thickness of the paint film after drying. This is particularly important for the painting and renovation of outdoor woodwork

poor hiding power - the paint cannot completely cover the surface, so the past colors or patterns will appear through the paint film. Once the paint film is eroded due to weather or cleaning, this 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 thinner paint film is not as good as that of thick paint film formed by the same paint

poor fluidity and leveling - brushing and roll marks are obvious on the dry paint film. A thick coating can provide better fluidity and leveling

final durability of outdoor painting works - under the same conditions, thin paint film is more likely to be eroded than thick paint film

consistency of Gloss - too thin coating film will damage this important performance

primer will also be affected

problems caused by coating not in accordance with the specified coating rate are not limited to coating, but primer will also be affected. This is because coating the primer too widely will also lead to too thin paint film after drying, which in turn will weaken its main performance

as for the primer, the main properties affected by the coating rate are: cracking resistance, hiding power, mildew resistance, consistency of gloss of the finish paint, and according to the different properties of the primer, including stain sealing and corrosion resistance

therefore, take some time to measure your painted surface to calculate its area. Then roughly determine the amount of paint, colorant and/or primer required for painting the entire area, in litres. Whether you use spraying, roller coating or brush coating, 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 very rough exterior wall surfaces, such as rough cement surfaces, the coating area per liter can be about 3.6 to 5 square meters, while for smooth surfaces, such as sealed concrete casting surfaces and smooth wood surfaces with primer, the coating area per liter can be 10 to 11 square meters

whether you contract indoor or outdoor projects, you should always apply paint and primer at the application rate recommended by the manufacturer. In this way, you can get a thicker, more protective and longer lasting paint film - all of which will make your customers uncontrollable " Publicize everywhere "e; Your project quality

dilution is not a good method

painting a certain amount of paint on an area larger than the recommended area is a practice that leads to too thin paint film, which will damage the key performance of the paint. Another way to cause the paint film to be too thin is to dilute the paint

diluting the coating is a problem worthy of concern, because it will affect the coating and use performance of the coating. For example, if the emulsion paint is diluted with water before coating, and the coating is still applied according to the recommended coating rate, the coating coverage (measured by the thickness of the dry paint film) will also be reduced, because the dilution process reduces the volume solid content in the coating. This will also weaken the performance mentioned above in the article about coating too thin

dilution will also destroy the performance balance of the coating, especially the balance between fluidity, leveling and sagging resistance. Diluting the paint will cause it to hang on the vertical surface, inducing the painter to paint less paint, which will also cause the dry paint film to be too thin

therefore, do not dilute the paint unless it is necessary (when spraying, it may be necessary to dilute the paint), and you should follow the instructions of the paint manufacturer

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