Paint hole filling

1 why is it best to use primer to fill the bottom of the painting process?

Answer: Because the primer is designed for the main purpose of filling, it has excellent filling and polishing performance and low cost, but if the top coat is used as the bottom layer, the filling effect is poor and the cost is high.

2. In the bottom coloring process, why not fill the wooden eyes with transparent putty?

Answer: Using transparent putty before coloring will make the plate uncolored. If transparent putty is used after coloring, the uniformity of coloring will be affected because of the uneven thickness of putty.

3. What's the difference between warehouse seal and primer seal?

A: The permeability of DeDebao is better than that of primer. After the film is formed, a seal is formed between DeDebao and wood fiber, and the film is denser than the primer. The sealing effect is better.

4. Why should the primer be thoroughly polished before painting the top coat?

A: 1 to enhance its adhesion;

2. The topcoat has strong sinking property. If the primer is uneven, the smoothness of the coating film is poor after the top coat is applied.

5. What is the standard for thorough polishing of primer?

A: There is no bright spot at the angle of 1 and 450;

2. It's ground glass.

6. What is the standard for the number of times of priming?

Answer: the wooden eyes should be completely filled. That is, a smooth paint film effect can be obtained by grinding.

7. Why does 7.PU paint emphasize the matching use of main paint, curing agent and diluent?

A: Different PU paint dilution systems have different solid contents. If inappropriate diluent or curing agent is used, it will affect the cross-linking reaction of coatings, resulting in defects such as insufficient hardness, drying and cracking of paint film.

8. When preparing PU paint, why do you emphasize the proportion as required?

A: The ratio of PU paint to curing agent is calculated by the molecular formula of chemical reaction. The proportion should be strictly controlled. If more curing agent is added, the paint film will become brittle and easy to burst. It is easy to produce bubbles during construction, and the matt luster is high. If the curing agent is added less, the hardness of the paint film is not enough, the scratch resistance is poor, and it will dry slowly or even dry.

9. Why can't solid paint be used for color matching?

Answer: Because the color components in solid coatings are mainly pigments. The essence of color is composed of dyes and has no hiding power. If color essence is used in solid color paint, the color tone is not obvious and floating color is easy to appear, so color masterbatch is used in solid color paint.

10, coating construction, why do you need to fully mix?

A: Paint is a mixture of resin, pigment and solvent. This is not the solution. At the same time, the pigment and matte powder in the matte coating are dispersed in the coating solution. Therefore, there is usually a certain degree of sinking during storage, forming the usual paint delamination. Therefore, the coating should be fully mixed before blending. (The paints that must be mixed are: matt paint, transparent color surface, solid color paint, bright color paint and wood grain treasure.

1 1. How to treat the yellowing resistance of paint?

A: The yellowing of paint is a characteristic of paint, not a disease. Therefore, the yellowing of paint is relative, not absolute. In PU paint, yellowing-resistant paint and yellowing-resistant paint are generally used, while light-colored board generally adopts yellowing-resistant paint, and dark-colored board generally adopts yellowing-resistant paint.

12. How does the moisture content of wood affect the finishing quality?

Answer: Undried wood contains a lot of water. At low temperature and high humidity, wood absorbs moisture in the air and expands. Under the condition of high temperature and low humidity, the water in wood gradually evaporates and shrinks, but the shrinkage and expansion rate of wood is different in all directions. Longitudinal minimum, radial maximum and chordal maximum. When the ambient air state changes, the moisture content of wood also changes, leading to the expansion or contraction of wood. Generally, the moisture content of wood should be controlled at 8- 12%. If the moisture content exceeds the controlled moisture content, the wood of the furniture will appear wet, and the coating will slowly dry when painting, which will reduce the adhesion of the paint film and make the volatile coatings such as nitrocellulose white. It will produce bubbles, pinholes and other film defects in cured dry paint (such as PU paint). When the climate is dry, the moisture contained in wood evaporates and shrinks, which is easy to produce cracks and destroy the surface of paint film. Therefore, the wood used for furniture must be dry, and the moisture content should be controlled within the specified range. In addition, wood blanks must be effectively sealed before priming. For example, the use of China Resources PS900 DeDebao can prevent moisture and other substances in wood from spreading outward, which is beneficial to prevent wood deformation, film blistering and pinholes. It is also helpful to polish and remove wood wool after drying.

13. Why is the paint film painted with nitrocellulose lacquer (NC) whitened and how to prevent it?

Answer: The phenomenon that the paint film is turbid or milky white after it is formed is called paint film whitening, which is also called whitening, whitening and albinism. The analysis of the difficulties in the whitening of the original nitrocellulose paint during spraying is as follows:

1, nitrocellulose paint itself has very good solvent release, and it is easier for solvent to evaporate into the atmosphere in NC paint than in other paints;

2. Most formulations of 2.NC paint contain solvents that volatilize quickly;

3. In case of high temperature environment, the solvent volatilizes quickly;

4. The solvent quickly volatilizes, which absorbs the internal energy of the wet film of the newly sprayed NC paint film, so that the surface temperature of the wet film instantly drops by 2-30℃, providing a "cold bed" for "condensation";

5. The high-temperature and high-humidity environment makes the high-content water vapor around the wet film quickly condense into tiny water droplets on the "cold bed";

6. The water droplets have poor miscibility with the wet film, resulting in turbidity or milky white phenomenon, which is called "whitening".

The above 1, 2, 3 is the premise of whitening, 4 is the intermediate process, and 6 is the final result. After the whitening phenomenon occurs, proper heating (such as illumination) can make the whitening disappear and recover. Others are irreversible and will turn white forever. The reasons for it were not known Although there are estimates, I won't go into details.

14. The following measures can be taken to prevent the paint film from "whitening":

1, the coating environment temperature is 15-250℃, and the relative humidity should not be greater than 75%;

2. When spraying, always check the effect of the oil-water separator and eliminate the moisture in the compressed air in time;

3. Pay attention to using high-quality paint and natural water as much as possible;

4. In high temperature and high humidity environment, white water (such as Nz308 white water of China Resources Furniture Paint) can be added in case of whitening during construction. In fact, slow-drying solvent is added, which reduces the evaporation rate of solvent on the surface of wet film and does not allow the formation of "cold bed". When adding white water, first add white water into Tianna water and stir evenly, and then add Tianna water into the paint normally. Generally, the addition amount is Tianna water: white water = 9: 1 (weight ratio). The maximum dosage can be increased to 20% of God's water. In this case, the paint film is still white, so we should stop painting and start construction after the ambient temperature and humidity decrease. Because too much white water will make the paint film dry too slowly, become soft and sticky, and affect the quality of the paint film.

5, use the right method to keep indoor painting environment meets the requirements. It is wrong to open the doors and windows to "ventilate" when it rains outside Huangmei. When it turns cloudy and rainy outside, the humidity drops, but it will still be wet indoors and will not dry for several days. This is the result that water vapor is easy to enter and difficult to exit. At this time, it is right to open doors and windows or even force ventilation.

15. What is "wet to wet" spraying? What processes and varieties can be used for "wet-to-wet" spraying in spraying construction? How to operate?

Answer: The "wet to wet" process originated from the painting of industrial baking varnish. From the original two spraying, one grinding and one drying (spraying-drying-grinding-spraying-drying) to two spraying and one drying. When is the best time to "bump"? The key is to make the solvent of the first wet film evaporate as much as possible in the appropriate interlayer spacing under the environmental conditions at that time, so that the "feel" second paint film has no pinholes, bubbles and sagging during the curing process. The suitable interval between layers varies according to the weather, substrate, paint type and wet film thickness, usually within a suitable time after the surface is dried.

To "feel" well, the principle should be "slightly thinner at the bottom and slightly thicker at the top". The most easy operation is "the lower layer is too thick and the interval between layers is not enough". This should be emphasized, because "change requires restraint, haste makes waste". If it is wet and dry, it should be lightly ground to ensure adhesion, and experiments should be done to prevent wet biting.

Wet-to-wet process is usually used to spray PU polyester primer and NC nitro primer. Pinholes, bubbles and sagging often occur in thick spraying of PU and NC coatings. In order to avoid this phenomenon, you can spray it for the first time (usually once means twice). When the surface of the first coating is dry, the cross-linked cured PU primer has undergone a preliminary cross-linking reaction. For volatile NC primer, when the first paint film is dried, most of the solvents in the paint film have evaporated. The first paint film began to cure initially, and then the second paint was sprayed, because the first paint film was not completely cured. For PU secondary paint film, * * * participates in cross-linking reaction, and for NC secondary paint film, it permeates each other. Whether it is PU or NC, the second paint film will be integrated, without interlayer polishing, and the adhesion is also very good, just like the paint film sprayed once.

For PE paint, its own characteristic is that a thick spray does not produce pinholes and bubbles. Therefore, PE paint generally does not adopt the "wet-to-wet" spraying process, and PE primer is generally sprayed continuously at one time.

Through the above analysis, the "wet-to-wet" spraying process should be applied flexibly according to the actual situation to obtain good quality and economic effect.

16. The same bucket of matt clear top coat was bright at first, then it became less and less shiny, and finally it became all over Asia. What caused this?

A: To solve this problem, we must first understand the composition characteristics of matte finish. Usually, in addition to the basic components such as resin, solvent and additives, there are matting powders that determine the gloss of matte finish. Matte powder is insoluble in paint. But a kind of particle dispersed and suspended in pigment. After full wetting, the specific gravity of matting powder is greater than that of other components. Therefore, after storage for a period of time, the matting powder will slowly precipitate, and a large amount of matting powder will accumulate in the lower part of the whole barrel of paint. The closer it is to the bottom of the barrel, the more matting powder will accumulate. When using paint, if the whole barrel of paint is not stirred or not stirred enough, the content of paint matting powder in different parts of a barrel of paint will be different, or the content of paint matting powder will be different in different dumping time. In this way, the gloss of the whole barrel of paint will be brighter when it is used for the first time, and the gloss will be lower and lower when it comes to the primer. Therefore, before taking paint from the bucket every time, the whole bucket of paint must be fully stirred evenly from the bottom to the surface with a stirring rod. Pay attention to not only circumferential stirring, but also circumferential stirring. At the same time, the stirring rod should be pulled up and down, and the stirring rod should be inserted into the bottom of the barrel before lifting, so that the sediment at the bottom of the barrel can be fully and evenly mixed with the surface paint. At this point, the paint will be taken out for use and mixed with the paint in the required proportion. Only in this way can the performance (including gloss, hardness, fullness and hiding power) of the paint be consistent every time.

It is emphasized here that the deposition of matt paint is absolute, and it is relative that it does not sink. Good matte paint is allowed to precipitate, but it is best to mix it thoroughly before use. If it is left for a short time, a large amount of matting powder will sink to the bottom and agglomerate, which will be seriously layered, and it will be difficult to be uniform after stirring, and it will be difficult to draw a qualified effect, which is by no means a top grade.

17. Why is there oil leakage in spraying construction?

Answer: The coating shrinks on the surface of the coated object, forming beads and pinholes with different shapes and sizes. Like water sprinkled on wax paper, spots are exposed at the bottom. This phenomenon is called "oil leakage". Also known as "laughter". PE paint has a high probability of oil leakage. The reason of "oil leakage" is that the coating has poor wettability or high surface tension on the coating surface.

The causes of oil leakage are as follows:

1, oil, wax and moisture are mixed in the bottom layer or paint, which affects the adhesion of the paint film, and the surface tension of the paint film makes the paint film shrink and deviate.

2. There are non-drying diluents in the primer, such as kerosene and diesel oil. After drying, the topcoat is applied without timely evaporation.

3. The primer is too smooth, and the adhesion with the topcoat is less than the surface tension of the topcoat, resulting in oil leakage.

4. Poor wettability of the coating or too much silicone oil is not easy to form a uniform film, which is easy to cause oil leakage.

5. The air in the painting room is polluted. For example, in factories with processes such as polishing and acid vapor volatilization around the paint booth (such as shoemaking, pickling and electroplating), oil stains and acid vapor are blown into the paint booth with the change of wind direction, so that the paint film is oily.

Treatment of oil leakage:

1, handle the base course, and the coating shall be free of oil, wax and moisture. Check the separation effect of the oil-water separator, check whether there is oil and water vapor in the gas path, and if there is, clean it up before spraying construction.

2, paint construction viscosity should be moderate, choose a solvent with slow volatility, such as replacing the thinner used in winter with the thinner used in summer.

3. Try to avoid construction in a cold, humid and smoky environment, and the spray booth should not be built near a factory with polishing and acid vapor volatilization.

4. The amount of silicone oil in the paint should be appropriate, too much mixing will lead to oil leakage.

5. If oil leakage is found during construction, the construction shall be stopped immediately, and the cause of oil leakage shall be checked, and then the construction shall be carried out after elimination.

6. The oil-leaking workpiece should be polished and leveled after all practical work, and then daubed again.

18. What is the importance of polishing process in furniture painting? How to choose sandpaper when grinding?

A: As the saying goes, "10 is painter, and 3 is sand", which shows the importance of polishing in painting operation.

The grinding process mainly has three functions: ① for the substrate, it is to remove burrs, oil stains and dust on the surface of the substrate; (2) For the surface scraped with putty, the surface is generally rough, and it needs polishing to obtain a flat surface, so polishing can reduce the roughness of the workpiece surface; ③ Enhance the adhesion of the coating. Before spraying a new paint film, it is generally necessary to polish the old paint film layer after practical operation. Because the adhesion of paint on an excessively smooth surface is poor, the mechanical adhesion of the coating can be enhanced after polishing.

There are three grinding methods: dry grinding, wet grinding and mechanical grinding.

① Dry grinding: use sandpaper to grind. It is suitable for polishing hard and brittle paint, but the disadvantage is that it will produce a lot of dust during operation, which will affect environmental hygiene.

② Wet grinding: Use water sandpaper dipped in water or soapy water for grinding. Water milling can reduce wear marks, improve the smoothness of coatings, and save sandpaper and labor. But pay attention to water milling before spraying the lower paint. First, wait until the water mill layer is completely dry before brushing the lower layer of paint, otherwise the paint layer is easy to whiten. In addition, the substrate with strong water absorption is not suitable for water milling.

③ Mechanical grinding: In large-scale construction, in order to improve work efficiency, mechanical grinding methods can be adopted, such as electric grinding machine (disc type and vibration type).

There is also polishing: the painting requirements indicate "light grinding", such as repainting sealing paint, old paint film, local repair and so on. At this time, we should choose fine sandpaper and skilled hands for "light grinding". Otherwise, it is counterproductive.

When grinding, the grinding materials should be selected in strict accordance with the technological requirements, and sandpaper can generally be selected according to the following rules:

Choose 180 #-240 # sandpaper for polishing solid wood blanks.

220 #-240 # sandpaper is selected for the polishing of plywood or primer.

320 #-400 # sandpaper is selected as the polishing and leveling primer.

The last primer or topcoat is polished with 600 #-800 # sandpaper.

The top coat is polished with 1500 #-2000 # sandpaper.

When sanding by hand, the whole sandpaper is generally cut into four pieces, and each piece is folded in half and then clamped at both ends with thumb and little finger. In addition, lay three fingers flat on the sandpaper and polish it back and forth on the surface of the object.

According to the object to be polished, replace it at any time, and use the holes in the fingers and the expansion of the fingers to mechanically polish the concave and convex areas and corners.

When sanding a large area, it is necessary to master the principle of "depending on the height", rotate the sandpaper with your palm, or attach slightly hard rubber such as sponge and cork, and hold the left and right end faces tightly with your thumb and forefinger to make the sanding smooth.

The nail length of the sander should be moderate to avoid hurting fingers during operation.

In order to ensure the grinding quality, it is necessary to ensure the training, assessment and management of grinders. It is very important to keep the grinding team as stable as possible, thinking that "grinding work is the easiest, no need to teach, no need to worry". Or "anyone can polish it" is absolutely wrong.

A good putty scraper and a good gunsmith must first be a good grinder, so as to ensure the mutual inspection between processes and the final quality.

19. Why do bubbles and pinholes appear during spraying construction?

Answer: The analysis of bubbles and pinholes produced by spraying construction is as follows:

1. Phenomenon: At first, many large but few bubbles appeared on the surface of the coating, and then when the paint film was polished, the bubbles broke or worn, forming dense pinholes.

2. Reason: There are gases in the paint (solvent vapor, water vapor, expanded air or other gases that can be mixed into the paint, such as carbon dioxide, etc. ) penetrates the coating and expands to form bubbles, and then cracks or wears to form pinholes. When the drying speed of the surface layer of the coating is slightly higher than that of the inside, when the surface layer has begun to condense and the solvent or air inside continues to evaporate, it will break through the surface layer of the coating to form bubbles. This is related to the following situations: the viscosity of the coating is too high, the coating is thick once, the wooden conduit is thick and deep, the hole filling is not solid, and it contains air; Spraying air pressure is too high, and too much air is mixed in the coating; Oil, dust, sweat, etc. Attached to the surface of the coating, water gathers around these impurities; The temperature difference between the coating and the coated surface is too large; Improper use of diluent, excessive addition of curing agent or improper use of curing agent; The coating environment temperature is too high or relative humidity is too high; If the drying of the lower coating is not completed, applying the upper coating and quickly drying the upper coating; When the paint is heated and dried, the temperature is too high, the standing time of the paint before heating is not enough, the solvent is not fully volatilized, and the paint itself brings in bubbles, and the bubbles generated during stirring are not eliminated.

3. Elimination method: For the above reasons, check the coating process conditions, adjust the appropriate coating viscosity, match with the appropriate diluent and curing agent, and control the coating thickness; Do a good job of filling holes and polishing the substrate to eliminate the pollution of the substrate; Adjust the appropriate air pressure to reduce air mixing; Improve the working environment and control the appropriate temperature and humidity; Extend the recoating time appropriately to make the lower layer fully dry; After the paint is mixed, let it stand for 20 minutes before spraying; When the coating is dried by heating, the standing time is controlled to completely volatilize the solvent before preheating the coating.

20. What are the composition requirements and environmental conditions suitable for crack paint?

Answer: 1, plane, curved surface and other complex shaped special-shaped parts can be sprayed with crack paint.

2, the moisture content of white billet must conform to the local equilibrium moisture content.

3, plane or curved surface one-time continuous spraying area should not exceed 2 square meters, otherwise it should be segmented construction.

4, the construction site should be well ventilated, sufficient light, easy to observe the effect.

5, the construction site should be convenient for construction personnel to walk freely, can't have too many obstacles, scaffolding should be set up for high-altitude construction, so that construction personnel can walk freely.

2 1, what is the reason why the cracked paint does not crack?

Answer: 1, the paint film is uneven and full after applying crack paint or nitro varnish;

2, crack paint or nitro varnish drying time is too long;

3. When spraying crack paint, the air pressure is too high, the amount of oil is too small or the spray gun is too far away from the surface of the object;

4, construction negligence, paint can be opened, not fully mixed evenly.

22. What are the precautions for crack paint construction?

Answer: 1, before the crack primer, try to use two-component paint as the base.

2. One-component coating should be selected at the bottom of cracks. (NC type or special crack bottom is mainly used)

3, spray gun speed, interval distance should be consistent, and to master the displacement and oil output.

4, the same kind of crack effect paint construction viscosity should be unified.

5, spray crack effect paint construction viscosity should be unified.

6, air compressor air pressure should be consistent, don't big when small. The diameter of the spray gun should be1.5-2.0mm. The oil outlet should be clear.

7. When painting, when painting transparent topcoat, master thin spraying (secondary painting) for many times.

8. The crack pattern is presented by uniform cracks in the paint film. Don't spray it too thick at a time, or it won't crack. Carefully control the oil output and the number of guns, and choose the best mode. (Before the crack stops in the spraying process, it can be sprayed on the crack again to control the crack size. When spraying for the first time, try it on a small board).

9. The prepared crack paint should be used up within 4 hours.

23. Briefly describe the characteristics of Mingshida PUAA matte topcoat and AC636 advanced office paint.

A: PUAA products have good cost performance, fullness, transparency and hardness. And it has excellent yellow resistance, high hardness, good hand feeling, fast drying speed and good fullness in high-end office series.

24. Briefly describe the advantages of Mingshida PU color transparent topcoat products.

A: The characteristics of PU color transparent topcoat are: beautiful and exquisite, soft luster; The paint film has good color retention, is not easy to fade, is close to the color of natural wood, is natural and simple, and the transparent color is bright and dumb. The color transparent series is divided into three grades: the best color transparent series, the labeled color transparent series and the color transparent series A..best series are full and can meet the customer's requirements without covering varnish. Standard series are widely used products in the market, with high cost performance. Class A is an economical product, which is suitable for ordinary furniture.

25. Briefly describe the characteristics of Mingshida color paste product series.

Answer: Coloring paste is used for solid wood, veneer, veneer and other furniture. Good construction performance, convenient rubbing, no bleeding, uniform color, strong three-dimensional sense, rich and thick color, which can make the wood grain color uniform and improve the grade. It has no effect on the adhesion of primer.

26. What should I pay attention to when using PE series coatings?

Answer: When using PE series coatings, the accelerator and initiator cannot be directly mixed. During storage, the accelerator and initiator should be stored separately in two places. Tools must be cleaned after painting, and shellac paint or nitrocellulose paint cannot be used as sealing primer, which will affect adhesion. The prepared paint, especially the 25-degree paint, should be used up within 15 minutes. These are matters needing attention.

27. What caused the paint to crack?

Answer: The hardness of the top coat is too high, the flexibility is poor, the coating is too thick, the top coat is not dry, there are too many driers, the top coat is too dry, the coating is not suitable, the hardness of the bottom coat is too different, the coating is outdated, the pigment and resin are layered, the mixing is uneven and easy to crack, and the environment is harsh.

28. Describe Mingshida PU matte varnish, bright varnish and supporting curing agent.

A: M-3A is mixed with AG 103 curing agent, and AC23 1 advanced semi-dull varnish is mixed with AG 103 curing agent.

AC632 advanced semi-matte varnish is matched with AG 103 curing agent, and AC636 office advanced semi-matte varnish is matched with special curing agent for matte.

PUAA semi-matte varnish is matched with curing agent special for PUAA surface, and PU3A scratch-resistant semi-matte varnish is matched with curing agent special for PU3A topcoat.

AC 133 diamond crystal varnish is matched with curing agent special for diamond, and AC 13 1PU high-grade crystal varnish is matched with AG 103 curing agent.

ST84 10 super bright crystal mixed with AG 103 curing agent, and AG203 polished diamond crystal mixed with AC 135 polishing curing agent.

29. What are the functions of DeDebao?

Answer: DeDebao can make the head and bottom, brush or spray directly on the white blank, which can remove burrs, improve the surface effect of the coating, prevent the moisture of wood from diffusing from volatile substances, prevent the wood from deforming and foaming, increase the fullness of the paint film, and prevent the paint film from sinking for a long time. It can be used as a topcoat for color modification.

30. What are the causes of sagging?

1, coating construction viscosity is low and coating is too thick.

2. The spraying distance is too close, the spray gun is too close, and the moving speed of the spray gun is too slow.

3. The paint contains high-density pigments, and the mixing is uneven.

The surface of the quilt is too smooth.

There are several reasons for 3 1. bleeding. What are the solutions?

Reason: 1, apply top coat before the bottom coat dries. 2, colored nitro primer coated with polyester paint.

Methods: 1. After the primer is completely dried, apply the top coat. 2. The base coat and the top coat are used together.

32. Briefly describe the solution of paint wrinkling?

1, pay attention to the coating with quick drying at the bottom and slightly slower drying at the surface.

2. During construction, the viscosity of the coating should be moderate and the coating thickness should be well controlled.

3. Select the matching diluent.

4. Adjust the oil quantity and distance reasonably.

5, according to the weight ratio of correct operation

33. Briefly describe the causes of orange peel?

1, the solvent volatilizes quickly, and the leveling property of the coating is not good.

2. The nozzle diameter of the spray gun is large and the coating viscosity is high.

3. The uneven surface treatment of the coated object affects the leveling property of the coating.

4. Diluent mismatch

34, in the process of construction, what is the cause of paint bite bottom, have what way to deal with?

1, the bottom layer and the top layer do not match, such as nitro primer and polyester top layer.

2. The paint does not use a matching solvent.

Method: 1, primer and topcoat should be used together.

2. Use a matching solvent.

35. What caused the paint pinhole?

1, coating construction viscosity is too high, mixing time is too long, air can not be released into the coating.

2, the coating is too thick, and the solvent is difficult to volatilize.

3. The construction temperature is high and the humidity is high.

4, there is no supporting curing agent or the ossification dose is too large.

36. What factors are related to the surface roughness of finished products?

1, the year when the surface of the coated object was not cleaned.

2, the construction environment is not clean, indoor dust.

3. The mesh of the filter screen is too large, the coating is crusted, and the debris is not removed.

4, paint and thinner do not match, and the solubility is not enough.

37, in the process of operation, paint on the product, sometimes there will be bubbles, what is the treatment?

1, the wood moisture content should be equal to the local equilibrium moisture content (such as Beijing 10%).

2. Add slow dry water to adjust the volatilization speed.

3, should not be too thick, a coating is not more than 30 microns. ..

4. After stirring, let stand for 65438 05 minutes (25℃).

38. After the product is sprayed with topcoat, it sometimes loses its luster. What could be the reason?

1, the surface of the coated object is wet or has substances such as acid, salt and alkali.

2. The surface of the coated object is too rough, which absorbs a lot of paint and the coating is too thin.

3. The humidity of the site environment is high, reaching more than 90%, and the coating is easily whitened and discolored.

4. Too thin.