When painting the wall, it will usually be brushed more than twice. It may be that many people don't understand it very much, so it often passes over when painting the wall. In fact, this is not correct. The following small series tells you two. The role of the layers of paint, then you will understand.
Many owners are easy to ignore the role of the primer. In fact, the primer has a very large effect. First, it strengthens the adhesion between the base and the topcoat. It can penetrate into the pores of the foundation and form a claw-shaped layer deeply embedded in the base layer to form a base layer. Strong adhesion, and at the same time has a very good adhesion with the topcoat, which plays a role of supporting the upper and lower;
The second is that it closes the pores of the base layer, prevents the alkali in the cement from penetrating, causing the topcoat to bloom (so-called efflorescence) and reducing the amount of topcoat used. Therefore, it is necessary to apply the primer, and it must be ensured that the coating is uniform, no bottoming, no leakage coating; uniform thickness, no sag, etc.
The topcoat is a layer directly to the outside, so it has strict technical requirements for the construction of the painting. It requires a certain skill in the arrangement and time of the workers during the construction. In addition, the second coat must be painted when the second coat is applied. After the top coat is dry, it can be painted, and the second coat should be molded once, and it can not be repaired to ensure the uniform color, uniform thickness, no bottom, no leakage, no sag, no color. Clear color separation, do not add water to the topcoat, especially for deep-colored topcoats. Otherwise, the color of the water may be different due to different proportions of water added to the barrel; some coatings or coatings need to be sprayed, for example Silver fluorocarbon paint, because the aluminum sheet in the paint is sheet-shaped, so when spraying, it is necessary to maintain a fixed angle, fix the distance from the wall surface, and to form a molding, it is forbidden to repeatedly re-spray, otherwise it will The gloss of the coating will not be caused, and it will be dark after repeated spraying.
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