Paint knowledge | home decoration paint knowledge introduction original paint construction is so exquisite

Core tip: wall painting is a very important part of home decoration and the last step of wall construction Good wall paint construction can not only bring a bright appearance to the home, but also cover up the defects of concealed project construction 1、 The preparation of painting materials and tools on the wall needs to be done well in all aspects before the formal painting on the wall The preparation of wall paint construction mainly includes material preparation, tool preparation and working environment Let's take a look at the preparations to be done before painting the wall paint 1 Material preparation is the first thing to do The materials needed for wall painting mainly include cement mortar, interface agent, putty powder and wall surface Paint knowledge | precautions for wall paint color selection Recommended introduction: when painting the wall, the owner sometimes has difficulty in choosing what color of the wall paint to paint In fact, there is no ugly color in the wall paint, only the disharmonious color matching The use of wall color contains the knowledge of health Too strong color will stimulate people's perception, make people have a sense of fidgety, affect people's mental health Grasp the basic principles of wall color and paint a colorful space 1、 Wall paint color selection notice 1 Light color is generally used for the top surface Light colors make people feel light, dark colors make people feel heavy Usually, the treatment of rooms is from top to bottom, from shallow to deep For example, the ceiling and walls of rooms are white and Paint Home News: wall painting is a very important part of home decoration, but also the last step of wall construction Good wall paint construction can not only bring a bright appearance to the home, but also cover up the defects of concealed project construction 1、 The preparation of painting materials and tools on the wall needs to be done well in all aspects before the formal painting on the wall The preparation of wall paint construction mainly includes material preparation, tool preparation and working environment Let's take a look at the preparations to be done before painting the wall paint 1 Material preparation is the first thing to do The materials needed for wall painting mainly include cement mortar, interface agent, putty powder, wall paint, etc First, prepare the materials to be used, and then according to the product description, modulate according to different proportion 2 Some tools are needed to prepare the wall paint After preparing the required materials, don't forget to check whether the tools for painting are complete Common tools for wall painting include color paper, kraft paper, roller, brush, putty knife, sandpaper, etc Color separation paper: it is used to protect hardware and woodwork when painting In addition, it can also be used for separate protection when painting with different colors is needed Kraft paper: it is used for wall cracks and wall joints Its main function is to prevent cracks, stretch the wall and prevent the putty layer from peeling and cracking due to the influence of cement wall Roller brush: roller brush is often used in large-area coating roll coating Because of the wide range of roll surface, it is the most labor-saving and time-saving brush Brush: it can be used for painting, cleaning, etc it is the most primitive and commonly used tool Paint spray gun: the paint spray gun is required when selecting the spraying method Putty knife: it is a tool often used by painters It is simple and convenient to use Sandpaper: it is used to polish the wall to reduce the brush marks on the wall and make the wall more smooth 3 The application of wall paint in the working environment is very precise and meticulous, which has strict requirements for the construction environment The temperature and humidity of the construction site shall be appropriate, and the sanitary conditions, light conditions and ventilation conditions shall be good In order to paint the most perfect wall, family friends had better construct in a more suitable environment Temperature: different coating types have different requirements for construction temperature, which shall be controlled according to the temperature in the product description Generally, it should be between 10-35 ℃, and the minimum temperature should not be lower than 5 ℃; when coating construction is carried out indoors in winter, heat preservation and heating measures should be taken Humidity: the relative humidity during construction is generally 60% - 70% If the humidity is too low and the air is too dry, the solvent will volatilize too fast, the paint will dry and solidify too fast, and the conjunctiva of the coating will not cure well But high humidity environment or rainy weather is also not suitable for construction Light: there should be sufficient light in the construction site, especially in the color matching and color matching of the paint If the light is insufficient, not only the color is not correct, but also the phenomenon of brush leakage and sagging is easy to occur Ventilation: wall paint construction is not suitable in windy weather Too much wind will accelerate the evaporation of solvent or water in the coating, resulting in poor film-forming of the coating and easy to be contaminated with dust and affect the quality of the wall Sanitation: the sanitation condition of the painting place shall be kept in good condition, and the ground and air shall be clean and free of dust Otherwise, the dust will fall on the coating, which will cause particles on the surface of the paint film, reduce the smoothness, and increase the workload of decoration and grinding 2、 After the preparation of wall painting process, the construction of wall painting can be started To paint a perfect wall, you need to follow a certain technological process and brush step by step Next, let's see the specific steps of wall painting, what are the key points of painting, and what should be paid attention to 1 Base treatment of wall paint construction process: remove the peeling and loose parts of the wall, and make up with cement mortar The cracks are usually covered with kraft paper tape and white emulsion Generally, non load-bearing walls such as light body walls and thermal insulation walls need to be pasted Try to choose wall cloth with better texture and white emulsion or grid cloth Compared with the anti crack effect of grid cloth, it will be a little better to brush the interface agent: the interface agent can enhance the adhesion to the base layer, avoid the phenomenon of hollowing and peeling of the plastering layer, so as to replace the artificial roughening treatment, saving time and effort When painting the interface agent, it is necessary to evenly brush the wall surface for leveling: the uneven wall surface needs to be leveled, and the uneven wall surface needs to be leveled with plaster, so that the error of the wall surface does not exceed 3mm If the internal and external corners are not straight, plastering gypsum is also required, and putty is applied with guiding rule: it is better to select putty with high particle fineness and hard texture, and putty shall be applied three times The first time is generally thicker because it involves leveling The second and third times should be thinner, mainly for light absorption, so that the wall looks more smooth and flat After three times of application, the thickness of putty shall not be more than 3mm, otherwise it is easy to crack and polish: polishing is a key step in the painter's steps Only after polishing, can the effect of painting be good Try to use finer sandpaper If the sandpaper is too thick, it will leave deep sand marks After polishing, the wall must be cleaned thoroughly to avoid too much dust, affecting the adhesion of the paint The concave convex difference shall not be more than 3mm, and the primer shall be brushed evenly to ensure that every part of the wall is brushed If the wall has a large amount of paint, it is better to add a little more water to the primer to ensure that it can be brushed evenly Mending: after the putty is polished, there will be some defects Generally, it is difficult to see clearly It will be obvious only after one coat of paint is applied At this time, mending is needed Pay attention to polish and level the repair, and then brush the primer with a little more water to avoid color difference due to different water consumption of other walls when painting the top coat: do not add too much water, which will affect the thickness, feel and hardness of the paint film Try to choose a better tool The painting mainly focuses on the corner of the wall, the middle part of each roll and the direction of paint collection There are eight steps in the process of wall paint construction, namely, base treatment, interface agent, wall leveling, putty application, wall polishing, primer application, wall repair and finish painting Each step has its own operation method and construction requirements When painting the wall, each step should be done well according to the specific requirements 2 Key points of wall paint construction the construction steps of wall paint have been listed in detail The following mainly introduces what kind of painting method can be selected when painting wall paint, as well as the advantages and disadvantages of various painting methods At the same time, it also explains in detail the two steps of anti cracking treatment and wall leveling in the wall paint construction, so that everyone can understand the wall paint construction more clearly There are three common methods of wall painting: brushing, rolling and spraying When decorating, after measuring the advantages and disadvantages of various painting methods, choose the most appropriate painting method according to your own preferences Wall anti cracking treatment method wall anti cracking treatment will have an important impact on the painting quality of the wall paint If the treatment is not good, the wall may crack in the later stage When processing, the place with cracks on the wall is generally pasted with kraft paper tape and white emulsion Generally, non load bearing walls such as light body walls and thermal insulation walls need to be pasted with cloth When pasting, try to choose a better quality wall cloth and white emulsion or grid cloth, and the grid cloth will have a better anti crack effect How to level the wall also affects the final effect of the whole wall painting No matter it's a new house or an old house, the wall can't be completely flat, and the internal and external corners can't be completely vertical Therefore, the uneven part of the wall should be leveled with plastering plaster, so that the error of the wall does not exceed 3mm If the internal and external corners are not straight, they also need to be plastered and straightened with a guiding rule Page 2 3 Solutions to common problems in wall painting: when the wall paint is applied, a little carelessness may cause serious problems How to avoid problems and how to save them when they occur? Let's learn about the common problems and causes of wall painting and the solutions to the problems 1 The problem of sagging often occurs on the vertical surface of the wall or the connection (edge angle) between the vertical surface and the horizontal surface, and the paint film at the sagging position is thicker than that on other surfaces It is mainly due to the excessive dilution of the paint and the excessive amount of painting at one time Solution: the paint should be diluted in strict accordance with the proportion; when brushing, the thickness of the coating should be grasped, and the coating should be brushed quickly and evenly If any local sagging is found, it should be straightened with a brush immediately, and the redundant paint should be removed The hardness of the brush should be appropriate, and the brush hair should not be too long or too soft For spraying, if sagging is found, it can be polished with sandpaper after the paint film is dry, and then painted 2 The problem of poor covering power is brushed many times, and the color of the wall base can still be seen, or the overall color is uneven The reasons for this problem may be that the contrast between the primer and the top coat is obvious; the paint is excessively diluted and the paint film is too thin; the base of the wall is concave convex surface, usually the convex surface paint film is too thin; the dark and bright colors (such as dark blue, bright red, bright yellow, bright orange, etc.) of the wall top coat have poor covering power Solution: use the middle layer paint or primer which is similar to the color of the top coat, but slightly lighter; control the dilution ratio; use the roller construction effect is better; for some colors or wall base, the number of layers of the top coat should be increased appropriately 3 The cracks are linear, polygonal or indefinite The cause of the problem may be too thick or not dry and repainted at one time; the wall base is too loose or rough; the temperature is too low during construction; the paint primer does not match the top coat Solution: remove the affected paint film; ensure that the paint film will not be too thick in one construction; ensure that the front paint film is dry before recoating; if necessary, seal the wall base with a suitable primer; for the inner wall wall base with large roughness, it is recommended to use a flexible product; wall base temperature