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) Anti-alkali powder: The main reason 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: the main reason is that the paint liquid has impurities, the paint liquid is too thick, and the emulsion 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. (6) Crack: The construction temperature is too low. The film formation temperature of the latex paint cannot be reached and a continuous coating film cannot be formed; the base layer is improperly treated: the coating film is cracked due to cracking of the wall surface; the first coating layer is applied The second film is thick and not completely dry, and the coating film is cracked due to different drying speeds inside and outside. Cracking of the scraped cement putty causes cracking of the coating film. (7) shedding: The main reason is that the construction temperature of the latex paint is low, and the continuous coating film is not formed and cracked. When it meets the water, it will fall off; the base layer is loose, there is oil and Other dirt, and the coating film and the base layer are not well adhered, resulting in Peeling; the base layer is low in putty strength, the putty layer is not dry, that is, the latex paint is applied; the base layer is too smooth, so that the adhesion of the coating film is not good. Peeling off: Precaution: Observe before construction. If there is leakage, please ask the relevant department to solve it in time. Special treatment should be added. It is recommended to use the durable and waterproof bullet to brave the wall surface and then apply it as usual. brush. The wall must be cleaned during construction. (8) Discoloration and fading: Some walls are too hot, sunshine is long, or water-soluble salts crystallize on the surface of the wall, causing discoloration and fading of the latex paint; some walls contain too much alkali value, infringement Alkali-resistant pigments or resins cause discoloration and fading; latex and polyurethane paints should not be used at the same time. Apply latex paint two days after the paint is applied, or after the latex paint is completely dry (25 degrees Celsius) It takes 7 days to clean the oil. Other Home Textile Product,Home Textile Product,Bed Cover Chengfeng Hardware Co., Ltd. , http://www.hzcurtainrod.com
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