No matter what type of substrate is used for painting, some professional painters are not aware of the importance of applying a suitable coating rate. This is because it is usually possible to apply the coating at a higher coating rate and also to obtain a consistent appearance, especially when the color of the primer is similar to the color of the coating. For example, a painter may feel very good at brushing 12 square meters per liter of paint, and at the same time obtain a good appearance. However, if 10 square meters per liter of paint is the coating rate recommended by the paint manufacturer, coating at a coating rate of 12 square meters per liter will result in the thickness of the dry film only as a recommendation. 80% of the thickness. Regardless of how beautiful the appearance looks, too thin a dry film can adversely affect some of the key properties of the coating, all of which can affect the final quality of the project. Damage to performance quality Take mold resistance as an example. High-quality latex paints have better mold resistance than economical latex paints because they usually contain more anti-mold agents, an ingredient that is used to inhibit mold growth. However, if you paint the paint too thin, this benefit of the paint film will be minimized because the thin coating contains insufficient growth inhibitor additives. Thicker films not only provide the required mildew resistance of the coating, but also help prevent bacteria from obtaining nutrients from the substrate. The negative effect of overcoating on coating performance can also be manifested in a variety of other ways, including: Affects crack resistance - The crack resistance of a coating is directly related to its thickness after drying. This is particularly important for the painting and refurbishment of outdoor woodwork. Poor hiding power - The paint cannot completely cover the surface, so past colors or patterns will show through the paint film. Once the film is eroded due to weather or cleaning, the problem becomes very obvious. Poor washability - The necessary cleaning to remove dirt or stains may damage some paint films, especially on flat paint films. Therefore, thinner paint films are not as washable as thick paint films formed from the same paint. Poor flow and leveling - brush marks and roller marks are evident on dry films. A thick coating can provide better flow and leveling. Final Durability of Outdoor Coating Works - Under the same conditions, thin paint films are more susceptible to erosion than thick paint films. Consistency of gloss - too thin a paint film can impair this important property. Primer can also be affected Problems caused by painting not in accordance with the prescribed coating rate are not limited to paints, and primers are also affected. This is because too much primer coating can lead to too thin a film after drying, which in turn weakens its main performance. With regard to the primer, the main properties affected by the coating rate are: resistance to cracking, hiding power, mildew resistance, consistency of gloss of the top coat, and also stain blocking and corrosion resistance according to different properties of the primer. Therefore, spend some time measuring your painted surface to calculate its area. Then roughly determine the amount of paint, colorant, and/or primer needed to coat the entire area in liters. Whether you use spray, roller or brush coating, you should do your best to apply a sufficient amount of paint to the surface. 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 textured cement surfaces, the coating area per liter of paint is approximately 3.6 to 5 square meters, and smooth surfaces, such as closed concrete casting surfaces and primed Smooth wooden surface, can paint 10 to 11 square meters per liter of paint. Whether you are contracting for interior or exterior engineering, paint and primer should always be applied at the coating rate recommended by the manufacturer. This allows for thicker, more protective and long-lasting varnish - all of which will make it impossible for your customers to "promote" your project quality. Dilution is not a good way Applying a certain amount of paint over the recommended area is one way of causing the paint film to be too thin, which can impair the key properties of the paint. Another way to make the paint film too thin is to dilute the paint. Diluting the paint is a concern because it can affect the paint application and performance of the paint. For example, if the latex paint is diluted with water before painting and still applied at the recommended coating rate, the coating coverage (measured as the thickness of the dry film) will also decrease because the dilution process reduces the coating The volume of solid content. This will also impair the performance mentioned above with regard to the overcoating of the paint. Dilution also destroys the balance of properties of the coating, especially the balance between flowability and leveling and sag resistance. Diluting the paint will cause it to hang on a vertical surface, which will induce the painter to paint less paint. This will also result in too thin a dry film. Therefore, unless you must ask not to dilute the paint (the paint may need to be diluted when spraying), and you should follow the paint manufacturer's instructions for painting. Paint coating buy three tree paint paint paint paint latex cement
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Note: The thickness and thinness of the coating and dilution of the coating