What is the maximum allowable humidity for spray coating

Latex paint. Construction humidity requirements: relative humidity during construction.

Generally 60 70, if the humidity is too low and the air is too dry, the solvent will volatilize too quickly, the paint will dry too quickly, and the conjunctiva of the coating will be cured poorly. However, high humidity or rainy weather are also not suitable for construction.

The construction environment of latex paint mainly has the following requirements, you can take a look.

Latex paint construction temperature requirements: Different types of coatings have different requirements for the construction temperature, which should be controlled according to the temperature in the product description. Generally, it should be between 10 and 35, and the minimum temperature should not be less than 5;

Latex paint construction humidity requirements: the relative humidity during construction is generally 60 70, if the humidity is too low, the air is too dry, the solvent volatilizes too fast, the paint dries too quickly, and the conjunctiva of the coating is not cured well. However, high humidity or rainy weather are also not suitable for construction.

Latex paint construction light requirements: the construction site should have sufficient light, especially in the paint color matching, color matching, if the light is insufficient, not only the color is not accurate, but also prone to brush leakage, sagging and other phenomena.

Ventilation requirements for latex paint construction: wall paint construction is not suitable for windy weather. Excessive wind will accelerate the volatilization of solvents or moisture in the coating, resulting in poor film formation of the coating and easy to be contaminated with dust and affect the quality of the wall.

Hygiene requirements for latex paint construction: the sanitary conditions of the painting site should be maintained well, and the ground and air should be clean and dust-free.

Otherwise, dust will fall on the coating, causing particles to appear on the surface of the paint film, and the finish will appear.

decreases, increasing the amount of work for finishing and sanding.

As long as the air humidity does not exceed 80, you can spray paint.

When the oilman sprays all kinds of paints, he should be painted in strict accordance with the temperature in the product description, the ambient temperature of the paint should not be lower than 5, and the ambient temperature of the varnish should not be lower than 8. After 48 hours of 60% relative humidity, the latex paint can be ventilated and the humidity can be reduced, because the humidity is too fast to dry when the latex paint is completed, which can cause fine cracks.

Art paint construction on the air humidity is also required, can not be too low humidity, too low humidity will affect the quality, can not be too high humidity, too high is easy to crack, and with cement mortar plastering, the residual ash shovel clean, and then the wall is clean. 3. Repair the wall: Use plaster to level the bumps and potholes and gaps on the wall, and grind off the protrusions with sandpaper after drying, and sweep away the floating dust.

The waterproof coating is wetted on the construction base surface before brushing, pay attention to moisture control, and the base surface is required to have no open water, the paint needs to be stirred evenly during construction, and the direction of the painting is cross-shaped, and the second coating is carried out after the first surface drying, and the second coating can not be too thick 85% (theoretically, the minimum film-forming humidity of latex paint can be adjusted to 0, but the paint film is thin when actually painting, and it is easy to freeze and destroy latex particles in a cold environment, and because of the low temperature of the film-forming environment, it is easy to cause incomplete film-formation. Gang should avoid the cold.

So the best time to ventilate after painting in winter is between 10 a.m. and 4 p.m. Normally, it is cold in winter, and the doors and windows are closed during construction. It can effectively reduce the concentration of dust particles in the air, which also reduces the adhesion of the paint surface to be carried out after the last drying.

Each topcoat should not be too thick to avoid cracking). Maintain good air circulation at the construction site and avoid drying in the shade. Each process is dried naturally, remember not to dry with iodine-tungsten lamp.

We brush paint when decorating, and the ambient temperature of the general paint should not be less than 5. The ambient temperature of the varnish shall not be lower than 8, and the window can only be opened after the paint is fully dried, otherwise there will be cracking.

In general, the optimum application humidity of coatings is between 60-70%. Low humidity is conducive to coating film formation, but too low humidity and dry air will also lead to rapid volatilization of coating solvents, poor film formation, and poor coating quality.

I know very well about brushing paint, because I have a friend who has brushed a few times when decorating at home, I have also understood, I heard that the humidity of brushing paint can not be too wet, the ratio of water and paint is 4:1, this ratio is very easy to make the wall tidy, and stable, the effect is particularly good.

In general, the best application humidity of the coating is between 60 and 70 percent, and the lower humidity is conducive to the formation of the paint film.

1.Bumps, blistering, wrinkling, cracking, or discoloration of the surface of the substrate. 2.

Causes whitishness. 3.The surfactant can spill out and float on the surface of the paint, causing the paint to turn white or brown.

Humidity in the air is usually used"Relative humidity"(rh), which indicates the amount of water vapor in the air at a certain temperature, and the relative humidity is usually expressed as a percentage. The relative humidity of the air is generally between 50% and 90%, and when the relative humidity is 100%, it means that the air is saturated with moisture and begins to condense. As a general rule, when the relative humidity exceeds 85%, painting work cannot be carried out.

The high-pressure jet and leakage of airless painting will lead to serious injury accidents, and the operation should be done: 1. The nozzle of the spray gun is not allowed to face others and oneself at any time; 2. Do not touch the nozzle with your fingers or peep at the muzzle; 3. When cleaning the spray gun, the pump drive source should be cut off, the pressure should be released, and the safety device should be sold to the spray gun before cleaning; Hopefully, this service will help you <>

What are the effects of temperature and humidity on spraying?

Bumps, blistering, wrinkling, cracking, or discoloration of the surface of the substrate. 2.Causes whitishness.

Yuqing 3The surfactant can spill out and float on the surface of the paint, causing the paint to turn white or brown. Humidity in the air is usually used"Relative humidity"(rh), which indicates the amount of water vapor in the air at a certain temperature, and the relative humidity is usually expressed as a percentage.

The relative humidity of the air is generally between 50% and 90%, and when the relative humidity is 100%, it means that the air is saturated with moisture and begins to condense. As a general rule, when the relative humidity exceeds 85%, painting work cannot be carried out. The high-pressure jets and leaks of airless painting can lead to serious injury accidents, and should be done during operation:

1. At any time, it is not allowed to point the nozzle of the spray gun at others and yourself; 2. Do not touch the mouth of the spray book with your fingers, or peep into the muzzle; 3. When cleaning the spray gun, the pump drive source should be cut off, the pressure should be released, and the safety device should be sold to the spray gun before cleaning; I hope this service can help you <> [Xianzi Tonghua].

Is there a workaround.

Solution: Oil-water separation, note drainage; Add slow-drying thinner; The surface is clean, and the paint is added with anti-white water; It should not be too thick at one time.

The temperature is too high: if the cooling effect is not obvious, it may be caused by the failure of the air conditioner or the poor ventilation system, due to the strict requirements of the paint booth for air filtration, the possibility of poor ventilation system is very high, in this case, the air filter needs to be cleaned or replaced in time. If you need to increase the cooling rate, you can sprinkle water on the indoor floor to cool quickly by evaporating the water.

The temperature is too low: When the temperature rises above, the diluent can also be appropriately reduced, or the diluent suitable for low-temperature volatilization can be used.

Coating humidity.

1. Excessive humidity: It is easy to produce undesirable phenomena such as light blistering.

2. The humidity is too low: it is easy to cause particles and orange lines.

Medium constant coating humidity.

Polyester paint: 18 -25, relative humidity less than 75%;

Nitro paint: 18 -25, relative humidity is lower than 75% (relative humidity higher than 95% nitro paint can not be constructed, humidity is lower than 0, humidity is greater than 75%, will cause slow drying, slow response, loss of light, whitishing and other phenomena).

Latex paint: more than 5, the relative humidity is less than 85% (theoretically, the minimum film-forming humidity of latex paint can be adjusted to 0, but the paint film is thin when actually painted, and it is easy to freeze and destroy latex particles in a cold environment, and because of the low temperature of the film-forming environment, it is easy to cause incomplete film-forming.) Gang should be protected from cold and rain).

I feel that the temperature should be between twenty-five and thirty degrees, and the ratio of paint is 1:

It is recommended to control the optimal temperature of the paint booth at 15-25 degrees Celsius and the humidity at 40-70%.

If the temperature is too low, the spray will be uneven, the adhesion will decrease, the drying will be too slow, the temperature will be too high, the volatilization will be too fast, and the paint surface will be uneven;

If the humidity is too low, the cleanliness of the workshop will decrease, and the defective ratio of impurities and wool will rise. Too high humidity may cause condensation on the surface of the paint film, and there is dew on the surface for coating, which will reduce the adhesion of the coating; The topcoat is dull and whitish;

When the relative humidity is greater than 85%, the coating is easy to cause whitening, cracking, decreased adhesion, coating peeling and other quality abnormalities;

The humidity of the construction environment is too high, the oil-water separator of the spraying equipment fails, the air is not filtered, and it is easy to produce adverse reactions such as bubbles and pinholes; Water is mixed in the paint, causing pigment particles to accumulate and produce pitting after spraying.

The effect of humidity on spraying operations can lead to whitening.

Raw solid: the compressed air is mixed with water on the paint film, the temperature at the job site is high, and the paint dries too quickly; The moisture content of the surface is high and the air humidity is high; Too thick for one spray.

Solution: Zhongheng oil and water separation, pay attention to drainage; Add slow-drying thinner; The surface is clean, and the paint is added with anti-white water; It should not be too thick at one time.

The indoor temperature should not be lower than 5 degrees when painting the walls.

Wall paint refers to the architectural paint painted on the wall of the room, the temperature is not suitable for decoration below 0, the ambient temperature of the commonly used mixed color paint construction should be above 0, the ambient temperature of the paint should not be lower than 5, and the ambient temperature of the varnish shall not be lower than 8. Therefore, in winter, the decoration construction should ensure that the indoor temperature is at least not lower than 5.

And after the home decoration wall painting, the maintenance period is generally 7 days (room temperature of about 25 degrees), low temperature or high humidity should be appropriately extended, the maintenance period should have good ventilation, no water on the latex paint coating film, no scrubbing of the latex paint coating, and avoid bumping the latex paint coating.

What are the precautions for painting wall paint in winter:

In the construction process of brushing paint, pay attention to the control of temperature, too low temperature will cause some problems, in general, the temperature is divided into three points "three nodes, putty must be completely dry before the next process, between 10 am and 4 pm is the ventilation time.

In winter, the indoor temperature of varnish construction shall not be lower than 8 degrees, and under normal circumstances, the ambient temperature of coating construction shall not be lower than 5 degrees. Normally, the temperature of the mixed color paint should be above 0 degrees during construction. And the temperature during normal construction should not be lower than 8 degrees.

It should be noted that if the indoor temperature is not up to the standard, you need to take some measures, such as turning on the electric fan, oven, or heating. The temperature must be ***, otherwise, the paint effect of the brush will be very bad, and even some problems will occur.

What is the environmental performance of paint-free board?

There is no such thing as a completely environmentally friendly board, and the main source of pollution from common boards comes from glue and paint used in the processing of the plates. The advantage of paint-free board compared with other boards is that it is paint-free, which eliminates the pollution of benzene and paint. Therefore, the environmentally friendly paint-free board should choose the paint-free board of the big brand of solid wood ecology, and you can choose a more environmentally friendly paint-free board!

Melamine itself is very toxic and relatively stable, and it will not be free of toxicity after curing. Whether the melamine board for making furniture has pollution to the air depends on the substrate of the medium density board or particle board used in the melamine board, if the formaldehyde emission of the substrate meets the environmental protection standard, melamine will not aggravate the material pollution, the melamine board has no smell, and the smell is emitted by the inferior quality of the MDF, the adhesive or additive used in the coating contains formaldehyde and other substances.

What are the precautions for painting wall paint in winter and what is the environmental performance of paint-free boards, and the recent situation is analyzed here for you today. However, it is still necessary to remind everyone that the wall paint can be constructed in winter, but it cannot be ruled out that the construction effect of the wall paint in winter will not be very good, so it is recommended that if you can paint the wall in other seasons, then you don't have to wait until winter, we can carry out construction according to the actual situation of our own decoration.

There are certain requirements. If the temperature is not suitable, it is easy to cause the paint to dry out and become uneven.

I think there is a request. It is not recommended to brush the paint in rainy days, because the humidity is high and the wall skin is easy to fall off, and then there will be bubbles.

There is a requirement for humidity in brushing paint, because too high humidity will cause the paint to not dry, which will fall and make the wall unsightly.

I think that if you brush this kind of paint, of course, there is a requirement for humidity, if the humidity in the air is too high, it is not conducive to the dryness of this paint, and it will cause it to be stained with a lot of dust, which is even worse.