1. Construction specifications for wall paint
(1) Construction Procedure: The standard procedure for wall paint painting is the same as that for top latex paint. The main difference between it and the top painting is that there are differences in the basic treatment and construction methods. Please refer to the top latex paint specification program.
(2) Technical Essentials z Wall latex paint is the most commonly used method in home decoration paint construction. The construction should pay special attention to the following issues:
Grass-roots treatment is the key to ensure the quality of construction. Among them, it is the most basic condition to ensure that the wall is completely dry, because the cement used for cement is not strongly cured before it is hardened. At this time, the latex paint must be anti-alkali. When the cement mortar hardens, the basic value drops sharply, and the latex paint can be applied at this time. The drying time varies depending on weather conditions and should generally be kept for more than 10 days. The wall surface must be flat and at least scraped twice. If it still fails to meet the standards, it should be scraped to meet the standard requirements.
The method of applying the latex paint may use hand brush, roller coating and spray coating. Among them, the loss of the hand brush material is less, and the quality is also more assured. It is a method used more often in home decoration. However, the hand brush has a longer period of time, so it can be combined with the roller coating. The specific method is: a large area is the use of roller coating, and the corner part is used with the hand brush, which not only improves the brushing efficiency, but also guarantees the brushing quality. When the latex paint is applied, it must be fully stirred before it can be used. When it is used for color matching, it is necessary to choose an alkali-resistant, light-resistant color paste to be mixed into the paint, and it is forbidden to mix dry paint into the paint. After the emulsion paint with color paste is mixed, it must be stirred for at least 5 minutes, so that the color can be used after the construction.
Hand brush latex paint using a row of pens, row pens should be soaked with water, wet, clean up the fallen bristles before use. The first pass of latex paint should be diluted with water and brushed. The brushing is done first and then down. A row of pens and a row of pens should be brushed. The rear row of pens must be immediately adjacent to the previous row of pens. Pen paint can not be too much. When brushing the second time, less water should be added than the first pass to increase the consistency of the paint and increase 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 brush on the wall by hand. Make sure it is dried and polished with fine sandpaper. No matter how many times it is brushed, the last time it should be brushed up and down, from one end of the wall to the other end, the joint part must be connected and brushed, and the brushes should be straightened. The brush should not be too big. When brushing, it should be operated continuously and quickly, once brushing, and not in the middle.
The roller coating is the use of paint enamel for coating, the technical essentials are: the paint is mixed evenly, the viscosity is adjusted to be suitable for construction, poured into a part of the flat paint tray, the paint is picked up in the tray, and the rolling bowl is made The coating is evenly and evenly attached to the cartridge. When finishing the wall surface, first move the feathers up and down in a W-shape, apply the paint roughly to the wall, then press and hold the roller to make it close to the wall, and smoothly roll back and forth, left and right to spread the paint evenly, and finally use Roll the barrel in one direction. When the roller is applied to the joint, the empty tweezers not coated with the paint should be used to roll it over again to avoid unevenness in the joints.
Spraying is the use of pressure or compressed air, spray paint on the wall through the spray gun, the operating technology essentials: First, the air compressor spray pressure should be adjusted, generally in the range of 0.4 to 0.8 MPa, the specific construction should be Coating product instructions for use. During the spraying operation, the spray gun should be steady, the paint outlet should be perpendicular to the coated surface, and the spray gun should be kept parallel to the coated surface when moving. The speed of the spray gun is appropriate and should be consistent. Generally, the speed should be uniform between 400 and 600 mm per minute. .
When spraying, the distance between the nozzle of the spray gun and the painted surface should be controlled between 400 and 600 mm. The spray gun should move in a straight line or perpendicular to the ground. The range of movement should not be too large. After a straight line of 700 to 800 mm, it is turned 180. Reverse spraying the next line, the overlap width of the two lines should be controlled at about l/3 of the spraying width.
2. Acceptance of latex paint
The types and colors of materials used for latex paint painting meet the design requirements, and the brushing surface has the same color. It is not allowed to have quality defects such as penetrating ground, leaking brush, falling powder, alkali, peeling, and biting. When spray guns are used to spray, the spray points are even and dense, and no skinning phenomenon is allowed. Flowing falls are not allowed. The hand touches the paint film and does not drop powder. The doors, windows, lamps and furniture are clean and free of paint marks.
The common quality defects of latex paint are blistering, anti-alkali dropping, flow falling, bottom penetration, and uneven coating.
(1) Foaming: The main reason is that the base layer is not handled properly and the coating is too thick. Especially when the large core board is used as a base layer, it is prone to blistering. The method of prevention is to mix the paint evenly before use, and to control the consistency of the paint liquid, brush 107 glue on the bottom putty layer before painting. When reworking, the blistering and peeling should be cleaned, and then the 107 glue should be repaired first.
(2) The main reason for anti-alkali powder z is that the base layer is not dry and wet construction, and unsweeped solid primer and paint too thin are also important reasons. If anti-alkali powder is found, it should be reworked and the brushed material should be removed. After the base layer is dry, it will be applied again. The construction must be brushed again with a sealing primer, especially for new walls. The thickness of the topcoat should be appropriate, and the white walls should be slightly thicker.
(3) Falling flow: The main reason is that the coating viscosity is too low and the coating is too thick. In the construction, the consistency of the paint must be adjusted and the water can not be added too much. When operating, the pens must be diligent, low-flying, and diligent, avoiding sagging and running. If the flow falls, it needs to wait for the paint film to dry and then polish it with fine sandpaper. After clearing the veneer, paint it again.
(4) through the bottom: the main coating is too thin, the number of times or poor material quality. In the construction, products with high solid content and strong hiding power should be selected. If found through the bottom, the number of times of top coat painting should be increased to achieve the required brushing standards for the wall surface.
(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 paint quality is poor. Use a good leveling brand in the construction. Before the last time the top 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.
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3. Estimated duration of latex paint
Latex paint painting technology is less complex and takes less man-hours, and the top man-hours in construction cost more than the walls. Taking a three-bedroom, two-room roof and a wall-coating latex paint as an example, it takes about six days, in which the base layer is treated for three days, the top coat is painted for two days, and the waiting time for the process is one inch. The duration of the latex paint application will vary depending on the ceiling, the complexity of the wall decoration, the operating methods used, and the quality of the latex paint. When the latex paint is applied to the base layer, it can be installed at the same time as the door and window installation. When the surface layer is brushed, it can be used together with the wood finish paint.
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