1. Construction specifications for ceiling latex paint

The top latex paint is mostly used in the algae ceiling and the original top surface. The construction is divided into three stages: bottom treatment, coating and primer and painting.
The standard procedure is: cleaning the base layer → filling the putty, partially scraping the putty, smoothing → the first time full of putty, smoothing → the second time full of putty, smoothing → brushing and sealing the primer → brushing the first time Paint → Make up putty, smooth → brush the second coat → polish and live.

Since the veneer of the algae ceiling is gypsum board or wood, when the base layer is treated, the nail cap and the nail hole when the decorative panel is treated should be emphasized. The joint of the gypsum board finish must be added with a fiberglass mesh belt. Apply the top layer of the top latex paint to at least two times. After each drying, apply the putty and gently polish it with sandpaper. Clean the surface layer with a dry cloth and apply it for the next time. Although the top latex paint is not technically strong, it must follow the standard procedure in order to obtain satisfactory results.

2. Construction specifications for wall latex paint

(1) Construction procedure: The specification procedure for wall latex paint is the same as that of top latex paint. The main difference between it and the top coating is the difference between the base treatment and the construction method. Please refer to the top latex paint specification procedure.

(2) Technical essentials Z wall surface latex paint is the most commonly used method for paint construction in home decoration. Special attention should be paid to the following problems during construction:

The basic treatment is the key link to ensure the quality of the construction. It is the most basic condition to ensure that the wall is completely dry. Because the cement is used as the bonding material, the mortar is strongly alkaline before it is hardened. At this time, the latex paint must be anti-alkali. When the cement mortar is hardened, the alkaline value is greatly reduced, and the latex paint can be applied at this time. Drying time varies depending on climatic conditions and should generally be placed for more than 10 days. The wall surface must be flat. At least the putty should be scraped twice. If it still fails to meet the standard, it should be scraped to meet the standard requirements.

The construction method of the latex paint can be hand brushed, rolled and sprayed. Among them, the hand brush material has less loss and the quality is also guaranteed, which is a method used in home decoration. However, the hand brush has a longer construction period, so it can be combined with the roller coating. The specific method is to use a roller coating on a large area and a hand brush in the corner portion, which not only improves the painting efficiency but also ensures the painting quality. During the construction, the latex paint must be fully stirred before use. When color matching, choose alkali-resistant and light-resistant colorant to be mixed with the paint liquid. Do not mix the paint with dry color powder. The latex paint with the color paste should be stirred for at least 5 minutes to make the color smooth before construction.

Hand brush latex paint using a pen, the pen should be wet with water first, clean the off the pen and then use. The first time the latex paint should be diluted with water and then brushed. The brush is applied first and then down, and a row of pens and a row of pens are brushed smoothly. The last row of pens must be next to the previous row of pens. There is not much paint in the pen. When the second pass is applied, water should be added less than the first pass to increase the consistency of the paint and improve the hiding power of the paint film. The specific amount of water should be determined according to the consistency of different brands of latex paint. When the paint film is not dry, do not clean the hair on the wall by hand. It should be polished and then sanded off with fine sandpaper. No matter how many times you brush it, the last pass should be brushed up and down. From the end of the wall to the other end, the joints should be connected and brushed, and the pens should be straightened out. The brush should not be too big. When brushing, it should be operated continuously and quickly. After one brushing, it should not be intermittent.

Rolling is done by using paint enamel. The technical essentials are: stir the paint evenly, adjust the viscosity to suit the construction, pour into a part of the flat lacquer plate, draw the paint in the pan, and roll the shovel. The paint is evenly attached to the cartridge. When painting the wall, first move the donkey up and down according to the W type, and apply the paint to the wall. Then press the tube to make it close to the wall surface, and roll back and forth smoothly to make the paint evenly spread. The cylinder is rolled once in one direction. When rolling to the joint, it should be rolled once with the empty scorpion of non-stick paint to avoid unevenness of the joint and reveal obvious marks.

Spraying is to use the pressure or compressed air to spray the paint on the wall through the spray gun. The technical principle of the spray is: firstly, the spray pressure of the air compressor should be adjusted, generally within the range of 0.4~0.8 MPa, and should be pressed according to the specific construction. Adjust the coating product instruction manual. When spraying, hold the spray gun firmly. The paint exit should be perpendicular to the painted surface. The spray gun should be parallel to the painted surface. The speed of the spray gun should be appropriate and should be consistent. Generally, the spray should be uniform at 400-600 mm per minute. .

When spraying, the distance between the nozzle and the painted surface should be controlled between 400 and 600 mm. The spray gun should be parallel or perpendicular to the ground. The moving range should not be too large. After the linear spray is 700~800 mm, turn 180. Spray the next line in reverse, the overlap width of the two lines should be controlled at about 1/3 of the spray width.

3. Acceptance of latex paint

The types and colors of materials used for latex paint are in accordance with the design requirements. The color of the painted surface is the same. It is not allowed to have quality defects such as through the ground, leaking brush, falling powder, skin alkali, peeling and biting. When spraying with a spray gun, the spray point is even and even, no skin phenomenon is allowed, no flow is allowed, the hand touch paint film is smooth, no powder is removed, doors and windows, lamps, furniture, etc. are clean, no paint marks.

4. Common quality problems and treatment methods of latex paint

The common quality defects of latex paint are blistering, anti-alkali falling powder, falling, bottoming and uneven coating.

(l) Foaming: The main reason is that the base layer is improperly treated, and the coating layer is too thick, especially when the large core board is used as the base layer, foaming is likely to occur. Method of prevention In addition to the uniformity of the paint before use, and master the consistency of the paint, you can brush the 107 glue on the bottom putty layer before painting. In the rework repair, the foaming and peeling should be cleaned, first brush 107 glue and then repair.

(2) The main reason for the anti-alkali drop powder is that the base layer is not dry and wet construction, and the unpainted primer and the coating are too thin. If it is found that the anti-alkali powder is removed, it should be reworked and re-coated, and the brushed material should be removed, and then the base layer should be dried before construction. The construction must be done with a sealing primer first, especially for new walls, the consistency of the topcoat should be appropriate, and the white wall should be slightly thicker.

(3) Flowing: The main reason is that the viscosity of the coating is too low and the coating is too thick. During the construction, the consistency of the paint must be adjusted, and the water should not be added too much. During operation, the pen must be diligent, less sturdy and diligent to avoid sag and runny. If a falling cake occurs, wait for the paint film to dry and then sand it with fine sandpaper. After cleaning the finish, apply a top coat.

(4) Through the bottom: mainly when the paint is too thin, the number of times is insufficient or the material quality is poor. In the construction, the product with high solid content and strong hiding power should be selected. If the bottom is found, the number of paintings of the top paint should be increased to meet the wall painting requirements.

(5) The coating is not smooth 2 The main reason is that the paint liquid has impurities, the paint liquid is too thick, and the latex paint quality is poor. In the construction, a brand with good leveling should be used. Before the last coat is applied, the paint should be filtered and used. The paint solution should not be too thick. When the coating is not smooth, it can be smoothed with fine sandpaper and then painted again.

5. Estimated construction period of latex paint

Latex paint is technically less complex and requires less man-hours. The working time of the top surface during construction is greater than the wall surface. For example, a three-bedroom, two-hall top, wall-painted latex paint takes about 6 days, of which the base layer is treated for 3 days, the topcoat is painted for 2 days, and the process waiting time is 1 夭. The duration of latex paint application varies depending on the complexity of the ceiling, wall decoration, the method of operation used, and the quality of the latex paint. When the latex paint is applied to the base layer, it can be operated at the same time as the door and window installation. When the surface layer is painted, it can work simultaneously with the wood veneer paint.

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