Paint knowledge how to brush latex paint how to brush latex paint

Core tip: it's a typical case to brush emulsion paint in the blank room I divided the construction process into eight steps, hoping to help you master some principles and essentials How to brush emulsion paint: check whether the cement wall that needs to be painted in the blank room is solid and flat If the plastering layer on the wall is not strong enough or there are large cracks and holes, it is recommended to complain to the developer or the property owner and ask them to redo If some holes are repaired by ourselves, gypsum can be used to fill them Special note: 1 Check whether the wall is solid and flat is a step in the house inspection To see if the wall is solid, a simple test method is as follows: find a hard point Application scope and advantages of roller ceramic coating Recommended introduction: the surface of ceramic rubber plate used for roller ceramic coating is cast into durable rubber plate by hundreds of independent small ceramic pieces Each ceramic piece has raised characteristics Under general conveyor belt pressure, thousands of unique cast bumps can produce positive traction, prevent slipping and extend the service life of conveyor belt roller At the same time, the bottom layer adopts high-quality rubber, which has strong elasticity and can play a good impact resistance role The scope of application of roller ceramic coating is one three six 83857180 (the same as V) 1 Roller coating in extremely harsh working environment 2 The belt joint is not suitable for fixing with iron buckle; 3 It is suitable for leather Paint Home News: rough room brush emulsion paint is a typical case, I divided the construction process into eight steps, hoping to help you master some principles and essentials How to brush emulsion paint: check whether the cement wall that needs to be painted in the blank room is solid and flat If the plastering layer on the wall is not strong enough or there are large cracks and holes, it is recommended to complain to the developer or the property owner and ask them to redo If some holes are repaired by ourselves, gypsum can be used to fill them Special note: 1 Check whether the wall is solid and flat is a step in the house inspection To see if the wall is solid, a simple test method is as follows: find a hard point object (such as key, screwdriver, etc.) and make a stroke on the wall to see if there is slag There is no shortcut to find cracks and holes, only care and patience 2 Generally, it is not recommended to apply putty and paint in kitchen and bathroom, and it is better to stick ceramic tiles Tiling is also a science We will talk about it later How to brush emulsion paint (2): there will be dust when the finished product is protected and treated on the wall, and there will inevitably be putty, paint or other glue dripping, so it is necessary to do a good job of protecting the existing finished decoration products in the room in advance Special note: the protection work is listed as a single step, in order to increase everyone's attention to it Don't leave any regrets because of carelessness, especially when there are some decorations that are not resistant to dirt at home, there are too many posts in the forum asking about cleaning methods! How to brush emulsion paint (3): make sure that the wall surface is solid and flat before puttying, clean the wall surface with steel brush or other tools, so that the cement wall surface is free of floating soil and heaviness as far as possible Roll the concrete interface agent once on the wall, try to be even, after it is dry (generally more than 2 hours), you can scrape the putty Special notes: 1 Use of interface agent: close the base layer to prevent the putty from problems due to loose cement wall, floating soil or over dry Its surface is more suitable for putty adhesion than cement wall 2 If you do not plan to brush the interface agent, please pay attention to the following words: Construction in summer, the wall is relatively dry, before construction, you should roll a layer of clear water (no open water left), to prevent the putty from pinholes or cracks due to too fast water absorption 3 For the new cement wall (for example, the developer redoes the plastering), the putty can only be applied after the 28 day maintenance period of the cement has passed, otherwise the phenomenon of putty bubble and insufficient strength will easily appear 4 Sticking cloth (kraft paper): its main function is crack resistance and high cost Generally, it is unnecessary to do on the wall But for thermal insulation wall, loose wall and cracked wall, the effect of pasting is obvious, so it can be considered to use (I will discuss this situation in detail later) How to brush emulsion paint four: puttying (please choose water-resistant putty) Before puttying, the flatness of the wall surface shall be measured (with a measuring ruler of more than 2m) to determine the method of puttying Generally, the wall can be puttied on two sides, which can not only level, but also cover the background color Putties with poor flatness need to be scraped several times more locally If the flatness is extremely poor and the wall surface is inclined seriously, it can be considered to scrape gypsum once for leveling, and then puttying The interval time of each putty application shall be more than 2 hours (after surface drying) Special notes: 1 Choose water-resistant putty: 821 is a kind of putty restricted by the order It is not water-resistant, not strong, easy to peel and crack Many workers often add white latex, 108 glue and other glue to increase the strength of 821, leaving a hidden danger for health Water resistant putty does not have the above risks It is solid, water resistant, and can be used without any glue It does not need to be removed for long-term use (10-20 years) It is a product that can truly achieve "long-term benefit of one-time construction" 2 The water-resistant putty shall not be scratched too thick in this construction alone, otherwise it will crack in the drying process, which is the defect of its beauty Therefore, when the flatness is poor, it needs to be constructed many times, and even use gypsum to make a thick base first Gypsum is not water-resistant, not solid, and the setting time is very fast, so it is obviously not suitable to scrape gypsum all over the house 3 When mixing the water-resistant putty, it should be configured according to the proportion of powder: water = 2:1 or so Use the electric drill to mix it first, and then place it for about 10 minutes after it is basically uniform Then use the electric drill to mix it fully, and then it can be used How to brush emulsion paint (5): after polishing the putty and water-resistant putty with full strength (5-7 days), it will become very solid At this time, it will be very difficult to polish again Therefore, it is recommended to polish the putty 1-2 days after scraping Grinding can be carried out at night, with more than 200W electric light bulb close to the wall for lighting, while grinding to check the flatness Special note: a large amount of dust will be generated when polishing putty Please prepare masks for the personnel on site Although putty is non-toxic and harmless, dust is not a good thing Pay attention to prevention (the end of "decoration" and the beginning of "decoration") how to brush the emulsion paint 6: brush the primer, clean the floating dust on the polished putty surface, and then brush the primer The primer can be applied once, and must be uniform After it dries completely (2-4 hours), the next step can be carried out Special notes: 1 About primer: the function of primer is similar to that of concrete interface agent, but in addition to providing good adhesion, primer can also save part of finish paint At present, the pace of life is fast Many families often can't wait for the putty to completely dry and the alkali disappears (5-7 days) before painting At this time, it is more necessary to brush a layer of alkali resistant primer to seal the alkali resistance of the water-resistant putty (this is another flaw of the water-resistant putty) Otherwise, the paint is prone to appear problems, especially for the colored paint, and there will be the phenomenon of map like color imbalance 2 Whether the primer needs to be mixed with water can refer to the description of the primer purchased, which is different How to brush emulsion paint seven: brush two times for finishing coat, and the interval between two times shall be more than 2-4 hours (depending on the surface drying time) until it is basically dry After the second finishing coat is applied, it will take 1-2 days to fully dry Before the paint is completely dry, attention shall be paid to waterproof, drought proof and sunscreen to prevent problems in the paint film Special notes: 1 Painting method: roller painting and spraying have their own advantages and disadvantages The surface of roller painting film is natural and textured, and the paint consumption is not much The surface of spraying film is delicate and smooth, but the paint consumption is more Specific options can be determined according to personal preferences and economic ability 2 Water mixing volume: most of the emulsion paint is sticky in the open state, so it is usually mixed with some water for better construction The specific water mixing amount of each kind of paint is different, but within 30% at most It should be noted that the mixing of colored paint must be careful, or the phenomenon of uneven color will occur easily How to brush the emulsion paint eight: the wall surface after acceptance shall be solid, flat, vertical intersection of yin and Yang, free of cracks, holes, uniform color, full paint film, and attention shall be paid to the protection of the finished product How to brush emulsion paint 9: emulsion paint construction process I, process base treatment → fully puttying twice → bottom coating → middle coating twice → emulsion paint surface spraying → cleaning 2、 Construction process 1 For base treatment, the ash block, scum and other sundries on the decoration surface shall be removed with a knife If there is oil on the surface, the cleaning agent and water shall be used to clean it After drying, the surface dust shall be cleaned with a brown brush; After surface cleaning, brush one side with diluent of water and interface agent (mix ratio of 10:1), and then fill up the uneven part of the bottom layer with bottom gypsum or caulking gypsum After the gypsum is fully dried, paste kraft paper or special wall cloth for crack prevention After the gypsum is fully dried, carry out the next construction; 2 The putty shall be fully applied twice For the first time, the rubber scraper shall be fully applied The horizontal scraping shall be flat, uniform, smooth, dense and flat, and the line angle and edge shall be neat Scrape as thin as possible, without missing scraping, joints shall not be reserved, and pay attention not to contaminate the door, window frame and other parts, or clean them in time After the first putty is dry, polish it with coarse sandpaper Pay attention to the balance of operation, protect the edges and corners, and clean with a brown broom after grinding; the second full puttying method is the same as the first, but the direction of puttying is perpendicular to the front puttying Then use coarse sandpaper to polish and level, otherwise, the third and fourth times must be carried out Use 300W sun lamp side lighting wall or ceiling surface to polish and level with coarse sandpaper, and finally use fine sandpaper to polish and level 3 The primer coating construction shall be carried out on a dry, clean and firm layer surface, and the coating shall be sprayed once, and the coating shall be uniform without omission 4 Construction of intermediate coating: if any unevenness is found before the first application of intermediate coating, the putty shall be used for leveling and polishing Before use, the paint shall be fully stirred with a portable electric mixing gun If the consistency is large, it can be diluted with water properly, but the amount of water added each time should be the same, and the consistency should not be different Then pour the paint into the tray and brush the first time with the paint roller The roller shall be painted horizontally, and then rolled longitudinally to drive away the coating and level it The roll coating sequence is generally from top to bottom, from left to right, from far to near, from corner to corner, from small surface to large surface It is required to be uniform in thickness to prevent excessive sagging of paint If the roller cannot be painted to the internal corner, it shall be supplemented with a brush, and no missing coating is allowed Remove the roller hairs on the wall at any time A wall should be built in one go Avoid overlapping of brush marks on the joint, and clean the paint on other parts with clean water in time After the first intermediate coating construction, it is generally required to dry for more than 4H before the next polishing process In case of wet weather, the interval shall be extended appropriately Then, use fine sandpaper for grinding When grinding, use light and even force, and do not wear through the coating The surface shall be cleaned after grinding; the production brush of the second intermediate coating is the same as the first one, but it will not be polished After brushing, it shall meet the requirements of general latex paint for advanced brushing; (if the front putty and the bottom layer of the paint are well treated, the deep brushing of this layer may not be carried out.) 5 Because the base material, tooth period, alkalinity and dryness are different, the emulsion paint surface coating shall be applied in advance