First, the main reason for faded color latex paint?
1, the choice of pigment: to bear about 40% responsibility. (Refers to light-colored - to be light-resistant to level 7 or above, weather-resistant to level 4 or higher. International standards: Lightfastness 1-8, 8 is the highest level; weather resistance 1-5, 5 is the highest level).
2, the production of latex paint to be genuine, the responsibility is about 25%. (Example: A lighter beige emulsion paint, because of their different quality and cost, respectively, color protection for one year, three years, five years and above).
3, construction issues: to bear about 35% of the responsibility. (The following mainly talk about the improper construction, easy to cause the fading of the outer wall.)
A, PH value? (The ideal PH value for emulsion paint is 8-9, while the newly completed cement wall has a pH of around 12.4).
B. Water problem? (The optimal water content of the paintable wall is <10%, while the new wall surface moisture is more than 20%.
C. How to construct after rain? (Whether the new or old wall surface is under rain, if the color of the wall surface is deeper than when it is not raining, the wall water content will exceed 15%).
D. The problem of new treatment of old walls? (Because it is the old wall, there will be inconsistent colors. There is a loose wall ash. The painter repairs and flattens the bumps. Usually, after mixing with 107 glue and white cement and stuffing, it is then brushed again and becomes a relatively consistent new one. On the wall surface, whether it is gray cement or white cement, the PH value after the new wall is still more than 9), how to solve the above four points:
First, naturally dry 14 days before construction.
Second, now have to drive time, can not wait to repaint after 14 days, only on the wall surface layer of moisture-proof anti-alkali agent (also called the sealer), must be completely sealed (> 10% of the water,> The pH of 9) instead of the normal emulsion, 1:1 water added to the hook.
E, overlap problem? It is best to construct by graded lines on the wall. However, due to the fact that there are no dividing lines for large walls, how can construction work be done? (On the premise that the wall is relatively flat, it is advisable to use two or two under each roller brush. When the brush is ready for dinner at noon, the last roller should be brushed one by one and marked up. Work in the afternoon. After that, the first action is to first mix the paint in the bucket, and paint the first roll full of paint on the wall next to the next morning, and then return to the last wall in the morning to make up the brush. In this way, the overlap color can be reduced to a minimum degree.If, according to the conventional construction of the painter, the two centimeter or so seams between the last roll of the morning and the first roll of the afternoon, it becomes four upper and four lower walls. After drying, it will naturally form a stack of colors).
F, putty problem? (Construction workers generally use 107 glue as a binder, plus some of the powder as bone powder, batches on a relatively rough wall after mixing, etc., etc.) It is easy to cause cracks on the wall, Bubbling and rolling the skin until the putty comes off together is mainly due to the insufficient adhesion and viscosity of putty. In addition, due to the fact that the house has four sides and is unreasonable, in the spring, summer and autumn seasons, the northwestern side is lighter in color than the southeastern side, and deeper in the winter. The reason is that the northwesterly wind is relatively large in winter and the wall is dry and dry, which means that it absorbs more paint and is relatively deep after drying. The opposite is true in spring, summer and autumn. There is neither the sun nor the wind in the north. The wall is slower to dry than the southeast, and it draws less paint and the color is lighter.
Second, the general wall and high-grade wall how to construct?
1, the general wall: Both sides are not strict requirements, only one sentence: What is the price of the other side? What do you do quality.
2, high-grade wall in two parts:
A. A latex manufacturer has never done a high-rise building and has the opportunity to receive a building.
In order to give their companies a “model house†and also have a basis for the subsequent competition in the project, the bragging capital is to maintain this “model building†by protecting the capital or losing money. In other words: Some latex paint manufacturers have not received a building within three or five years, which is a lack of factual basis - "model building" is critical (excluding interpersonal relationships).
B. The manufacturers who received high-rise buildings are, of course, profitable, but there is also a way to exchange formulas. Satisfy the stringent requirements of quality and price proposed by Party A.
Wall construction paint latex paint cement paint house
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