Paint knowledge | wood products painting construction process

Core tip: wood furniture is usually painted, and wood paint is like the clothes of wood furniture, which can cover up the defects such as scar and color difference, and can show the beauty of wood Do you know the construction process of wood paint? Let's learn from the decoration net! First, the preparation of wood paint construction materials and tools needs to be done well in all aspects before the wood painting The preparation of wood paint construction mainly includes material preparation, tool preparation and working environment Now let's take a look at the preparations before painting wood 1 The main materials used in the construction of wood paint are 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: wood furniture is usually painted, and wood paint is like the clothes of wood furniture, which can cover up the defects such as scar, color difference, and show the beauty of wood Do you know the construction process of wood paint? Let me teach you how to do it First, before the wood paint is applied, we need to make preparations in all aspects The preparation of wood paint construction mainly includes material preparation, tool preparation and working environment Now let's take a look at the preparations before painting wood 1 The materials used in the preparation of wood paint construction mainly include wood putty and wood paint The commonly used wood coatings are nitrocellulose paint, polyurethane paint and water-based wood paint The wood putty can fill the joints, scars, nail holes and other defects on the wood surface, save materials and labor, improve the smoothness of the paint surface and increase the appearance of the wood surface Compared with nitrocellulose paint (NC), wood paint has better decorative effect, faster drying speed, easier to repair, lower solid content, poor durability, light and color retention, and poor environmental protection Polyurethane paint (PE) film is full, thick, glossy and transparent; hard and wear-resistant, strong adhesion, film damage is not easy to repair; drying speed is slow; film is easy to turn yellow Water borne wood paint (W) has good environmental protection, no yellowing, good water resistance and no burning; the hardness of antirust and high temperature resistant part of water-borne paint is not high; the construction environment requirements are relatively high 2 Some tools are needed to prepare wood paint for construction Commonly used tools include sandpaper, filter screen, brush, emery cloth, spray gun, roller brush, etc Sandpaper is used to polish wood surface, filter screen is used to filter impurities in wood paint, and brush, spray gun and other tools can be selected according to different brushing methods 3 The wood paint construction in the working environment is a very precise and meticulous work, which requires appropriate environmental conditions Temperature, humidity, light, ventilation, sanitation and so on meet certain requirements to make a good paint effect Temperature: it is better to conduct at room temperature (15-30 ℃) If the temperature is too low, the film formation of paint will be slow; if the temperature is too high (over 35 ℃), the painting performance will be adversely affected Humidity: avoid humid air, which is harmful to most coatings, especially nitrocellulose paint, polyurethane paint, etc Construction in wet and rainy weather will cause white or slow drying Light: sufficient light is helpful to see the paint surface clearly, to distinguish whether the construction coating is uniform, and to avoid missing brush or sagging in time Therefore, the room with sufficient light should be selected for construction Ventilation: the construction site shall be equipped with ventilation equipment to maintain proper fresh air circulation In this way, it is not only beneficial to the health of the constructors, but also beneficial to the film-forming of the coating, and can reduce the potential fire hazard But the speed of air circulation should not be too fast, so as not to affect the coating quality Sanitation: the construction environment must be kept clean, and the dust and wear debris generated in the construction process shall be removed immediately, otherwise the final effect of the finish paint film will be affected Clean construction environment is particularly important in floor paint construction 2、 There are three effects in the process of wood paint application: closed, semi closed and open The closed effect is to completely cover the wood grain, while the open effect is to show the natural wood texture According to the different effects, the construction methods of wood paint are different In addition, there are mainly three kinds of wood paint: nitrocellulose paint, polyurethane paint and water-based wood paint Due to the different components of the products, the construction methods are also different There are various construction methods of wood paint It is best to choose the appropriate construction method according to the desired painting effect and the selected products In fact, there is little difference between various construction methods, which may be the difference of sequence and painting times Next, I will introduce some basic methods of wood paint construction 1 Before the treatment and painting of the board, the wood shall be cleaned first, and the dust on the wood surface shall be wiped clean When cleaning, special dust cloth can be used For large areas, such as floor, dust can be repeatedly vacuumed with a vacuum cleaner At the same time, polish the board surface or wood line surface with sandpaper, pay attention to protect the wood skin, not sand through The purpose of plate treatment is to effectively remove the stains, wood wool and wood thorn on the plate, so that the surface of the plate is clean and smooth, so that the subsequent painting can save labor and material 2 Plate sealing can effectively seal the plate and prevent the plate from being polluted Plate sealing can prevent excessive moisture absorption, moisture dissipation and deformation of the plate, enhance the adhesion between the paint film and the plate, save paint consumption and enhance the hardness of the paint film 3 The matching wood putty shall be selected for puttying, and after mixing, the putty shall be fully piled up to the wooden hole After the putty is dry, sandpaper shall be used to polish and thoroughly clean the putty on the wooden tools Filling wooden holes with putty can reduce the amount of wood paint and improve the smoothness of paint film Different painting effects have different requirements for putty scraping and coating For example, to make an open effect, the putty color should be modulated to be consistent with the plate color before scraping 4 The wood primer shall be prepared according to the required proportion in the primer construction, which can be applied by brushing or spraying The function of primer construction is to fill the wooden holes and increase the thickness of paint film During construction, after the primer is dry, it must be thoroughly polished with sandpaper, and then the primer shall be applied again It is required to paint evenly without sagging and fill the wooden hole smoothly 5 Sanding the board with sandpaper is actually a step throughout the whole wood paint construction process During plate processing, sanding is required, putty scraping is required, primer construction is required, and finishing coat is required before and after construction The sanding process is critical Sanding makes the plate smoother, smoother and easier to paint Sanding after painting makes the surface of paint film flat and smooth But pay attention to avoid cross sand during sanding, and do not use too coarse sandpaper for grinding 6 Before finishing coat construction, the wood surface must be cleaned again to remove dust particles, so that the paint film surface can have a better coating effect Each time the finishing coat is applied, it should not be too thick at one time It is better to apply it many times, and the construction of the next layer should be done after the paint film is dry The finishing coat construction directly affects the final effect of the paint film The finishing coat construction requires uniform application, no sagging, good glossiness, no obvious brush marks, and smooth and delicate feel 3、 Painting details of wood paint 1 Do not construct wood paint at the same time with latex paint If wood paint and latex paint are constructed at the same time, these TDI in free state will react with the composition of latex paint, making the wall painted with latex paint yellow So wood paint and latex paint can not be constructed at the same time It is recommended to brush the wood paint first and then the wall paint to prevent the components in the wood paint from polluting the wall 2 No matter what technology is used to prevent hardware pollution, first use masking paper to protect the hardware on the workpiece and prevent the hardware from being stained with wood paint In addition to the detailed operation and timely cleaning of the non hardware and other pollution places, the paint shall be applied first, and then the door lock, handle and bolt shall be installed to ensure the cleanness and beauty of the hardware 3 When the matching product wood paint is selected for construction, if the water-based wood paint is selected, it only needs to be diluted with water in proportion If nitrocellulose paint and polyurethane paint are selected, relevant curing agent and diluent shall be added, and they shall be mixed in strict accordance with the fixed proportion Therefore, nitrocellulose paint and polyurethane paint in the construction process, it is best to have professional guidance Strictly according to the proportion and select the matching diluent and curing agent to avoid undercutting, wrinkling and other problems 4 After the wood paint is mixed, filter it Because the dust in the air will form small particles when mixed with wood paint, if it is not filtered and brushed directly, particles will appear on the surface of the paint film, and the surface is not smooth Therefore, after the wood paint is prepared, it is necessary to use the filter screen to filter out the particles and impurities, and then it is better to carry out the construction after more than ten minutes of static 5 The remaining paint can be stored in a cool place for further storage after use Because of the addition of curing agent and diluent, nitrocellulose paint and polyurethane paint can only be used once, and the remaining paint can only be disposed At the same time, after the completion of the construction, the waste paint should be properly handled, and the tools should be cleaned in time 4、 The common problems of wood painting may cause serious problems if there is a little carelessness during the construction of wood paint How to avoid problems and how to save them when they occur? Let's understand the causes and solutions of common problems in wood paint construction 1 There are many size particles on the surface of the film Due to the unclean construction environment, the dust falls on the paint surface; the paint tools are not clean, there are dust particles in the paint brush, and impurities are brought out with the paint when painting; after the paint is prepared, it is placed for a long time and is not used, the condensation paint skin on the surface is mixed into the paint, and the paint film presents particles after drying Solution: before painting, clean the site and wipe the workpiece clean; before painting, check the brush, if there is any impurity, repeatedly remove the internal parts of the brush with a scraper, and clean them with diluent; use the paint as soon as possible after it is prepared, otherwise it should be fully sealed, if it is skinned, use a scraper to remove large pieces of paint, and filter the paint liquid before use 2 White problem paint film color than the original white, white fog The reasons are that the construction equipment is not clean, contains grease or impurities that are insoluble in the paint, and the paint film may turn white after drying; no matching diluent is used, there are more low boiling point solvents, or there is too much moisture in the diluent; the construction environment humidity is too high, so the