What is the cause of blistering of the car paint after touch up

1. The paint quality is not good

This kind of problem often occurs in roadside shops outside, and such shops tend to spray paint with low **, because the quality of the paint they use is not very good, and there may be some problems after spraying.

2. The construction conditions and process are not rigorous

Painting requires a good construction environment and certain technology, and there can be no moisture on the paint surface before painting; The paint surface needs to be filled with putty before touch-up.

After that, it should be thoroughly dried in a dry environment before entering the paint room to spray paint; The air duct connected to the spray gun must be kept dry and not allowed for the slightest moisture. If you don't do the above, it may cause the car paint to blister.

3. The paint is sprayed unevenly

If the paint is too thick, it may cause the paint to flow downward, and blistering will occur in the future; The spraying thickness of the paint is too thin, and it is easy to cause blistering or cracking of the paint surface after being exposed to the wind and sun.

Precautions for car touch-ups.

1. Touching up paint is not a trivial matter, and you must go to a special repair shop or repair shop.

2. The color of the repair paint is mixed before repair.

During the driving of the vehicle, the paint will gradually fade, and the naked eye can not distinguish it, but the degree of fading will be slightly different from different angles in the outdoor sun, and if you want to match the original color as much as possible, you can only match the color now. Also, in order to avoid color difference as much as possible, even if you only need to touch up the paint on a small piece, the factory will respray the whole piece.

Suggestions: 1. Do local repairs, don't go to big stores, general paint quick repairs, 3-500 a door, 2. If you don't deal with it, this bubble may spread and become bigger, and you still have to deal with it then;

3. Crystal plating is done on the surface, and the bubbles cannot be changed, and the cost is not low.

Cause analysis: After the dissection and analysis of the blistering part of the topcoat, the blistering layer is all above the middle coating. Only the topcoat film blistered, and the middle coating did not find any blistering.

The main reason is that the sealing ability of the primer is relatively poor, even if there is water vapor in the primer and primer film, it can volatilize through the micropores of the paint film. The paint film of the topcoat layer is relatively closed, especially after the complete reaction of the two-component paint, if the paint film contains water vapor, it cannot volatilize, and the topcoat film is locally stressed and produces bubbling phenomenon due to the action of weather temperature and bottom water vapor expansion.

The seasonality of producing rice grain bubbles is more obvious, and most of them occur.

In July and August, it is rainy and humid, and because the air contains a lot of moisture during this season, even in the paint booth, sometimes the humidity is greater than 70. When spraying paint, sometimes the surface of the coated object is ground by water, it is difficult to volatilize the water completely, if the paint is sprayed on the surface containing water, due to the relatively small amount of water vapor, it is distributed in a fog on the surface of the object. In the process of paint covering and film formation, water vapor can volatilize away with the volatilization of solvent, after drying, the paint film is closed to the water vapor, and the water vapor left under the paint film encounters climate change, and the water vapor at the lower part of the paint film expands, and the paint film will be jacked up, and the paint bubble is formed, which generally takes 3-5 days.

Causes of blistering paint on car respray:

1. First of all, the putty scraped on the car was hurriedly sprayed without being completely dry.

2. When making sheet metal, the iron plate of the car was broken, and the putty scraped without welding in time was also the cause of blistering.

3. The primer sprayed before spraying the topcoat will cause blistering if it is not cleaned, or if it reacts.

4. There are many reasons that will cause blistering, such as the poor quality of putty, or the air is too humid when spraying, the ratio of paint is incorrect, and the place to be sprayed is not covered with insignificant corners when spraying.

The causes of car paint bubbles are:

1. The paint quality is not good

This kind of problem often occurs in the roadside shops outside, and the paint in this kind of shop is often very low, because they also use low-quality paint, and the quality of these paints sprayed on the car can be imagined.

2. The construction conditions and process are not rigorous

The construction conditions and technology of the paint are very demanding, and it is strictly forbidden to have the slightest moisture on the paint surface before painting; The paint filling ash (putty ash) in the early stage needs to be thoroughly dried in a dry environment before entering the paint room for painting; The air duct connected to the spray gun for painting must be kept dry and does not allow the slightest moisture, which is also an important reason for the blistering of the car paint.

3. The paint is sprayed too thickly.

The spraying of the paint layer is not paid much attention or the technical limitations of the construction personnel often lead to the overall thickness of the paint is too thick and the paint body is downstream, and the later polishing is not handled well, which will also lay the groundwork for the future paint blistering.

The reasons for blistering of car paint are as follows:1. The quality of the paint is not good, and this problem often occurs in the roadside shops outside. These stores produce very low levels of paint** because they all use low-quality paint.

These paints are sprayed on the car, and the quality can be imagined.

2. The construction conditions and processes are not rigorous, and the construction conditions and processes of the coating are high. Before painting, it is forbidden to have any moisture on the surface of the paint. Previously, the filler ash (putty) of the paint surface had to be thoroughly dried in a dry environment before it could enter the paint booth for painting.

The air hose connected to the painting gun must be kept dry and no moisture is allowed. The above points are also important reasons for the blistering of automobile paint.

3. If the paint is sprayed too thickly, the spraying layer of the paint is not paid more attention or the technology of the construction personnel is limited, it will often lead to the overall thickness of the paint being too thick and the paint body flowing down. In addition, if the post-grinding treatment is not good, bubbles will appear on the paint surface in the future.

The main reasons for the blistering of car paint:

The sealing ability of the primer is relatively poor, even if there is water vapor in the primer and primer film, it can volatilize through the micropores of the paint film. The paint film of the topcoat layer is relatively closed, especially the two-component paint in the complete reaction, if the paint film contains water vapor, it can not volatilize, and the topcoat film is locally stressed and produces bubbling phenomenon due to the effect of weather temperature and bottom water vapor expansion.

Car paint blistering is one of the manifestations of car paint damage, unfortunately, there are not too many good ways to deal with car paint blistering, if the blistering is small, you can choose to use the same color paint for point coating, but this is just a rainy day, if there is blistering in multiple parts of the body, then the best treatment can only be to do the whole car painting, otherwise it will affect the beauty of the body very much.

The causes of paint bubbles are complex, but the most common causes are paint quality and construction process. Since this aspect of the factor is not controllable by the owner, we can only do paint maintenance to avoid or slow down the possibility of blistering of the car paint.

If the owner buys a new car in a 4S store, it is recommended to go to a 4S store to see the solution and see if the warranty part of the car paint has expired; If it is a second-hand car, it is recommended to scrape it off and repaint it.