Briefly introduce the basic situation of automotive coatings

Car paints are generally baked paints. In the depot, after the frame and shell are welded (sometimes manually repaired), the next step is to paint. In general, the primer is the first one. The light shell is immersed in a syrup-like paint tank, the drying primer is taken out; then the dust-free workshop is given and the top paint is sprayed with an electrostatic spray paint process. Then dry it with a temperature of about 200 degrees. Exquisite, there will be a layer of varnish. In this way, the paint process will be completed. There are several kinds of general finish: ordinary paint; metallic paint; pearlescent paint. Ordinary paint does not need to say, resin, pigments and additives. Metallic paint has more aluminum powder; so it looks bright after completion. Pearlescent paint, added mica particles. Mica is a very thin piece of material, therefore, the reflective directionality has a colorful effect. If it is metallic paint and varnish, the paint on the car looks bright and beautiful. In color, white is the cheapest. For example, the world-class brand red pigment is about 25 times more expensive than the world-class brand titanium dioxide, and the amount of titanium dioxide in white paint is about 5 times that of the red pigment. Therefore, the cost of red paint in color is 5 times higher than that of white paint. This is why some domestic cars have so few color varieties: simple and low cost.

No matter what color of paint, its pigment will fade in the sun. In fact, not only paint, but any coloured stuff may fade under the sun. At this time, it is very important how additives are added to the paint. Such as light stabilizers, such as antioxidants or something. Unfortunately, good additives are expensive and expensive. Many times, the quality of the additives determines how this paint gives a person a feeling. People will surely think that some kind of paint that began to fade significantly in two years is worse than five years. But in fact, there is no indelible paint. Many times, the factory is more concerned with: evenly fade. Try not to make the color difference in different parts of the car.

In the new car, the most vulnerable to damage is paint. Careless car washing, paint will be injured. In fact, even if you put things on the production line, there are things that damage the paint.

Generally small scratches, scars on the paint surface, whitening scars. It was the surface of the paint that had been shaved. There is no need to make up paint. Light, beat it with wax or do a few more waxes. Heavy, it can be polished.

Seriously, you can see the color of the underlying primer (in many cases, the primer is dark colored). Then, look again at the site of the scar. In general, bumpers, rearview mirrors, and some car wheel eyebrows are parts of engineering plastics. stainless. There are no big problems other than being ugly. It doesn't matter if you don't make up for paint. In other cases, it is necessary to re-paint, otherwise, even if it is a small damage, the steel plate will begin to rust, and even then it is difficult to prevent the embroidering.

Refinishing it, or recommend it to a specialized repair shop or specialized shop.

First of all, in all places, even in the original factory, after the car is installed, the paint will not use any original paint! If the repair shop tells you that they are using original paint, it must be lying to you. The reason is simple: When it comes to the original painting process, it was said that after baking the paint, it was baked at 200 degrees. With so many parts on the finished car, how many can withstand 200 degrees? Do you dismantle the car again, leaving only the car shell?

Refinishing paints use a special refinish paint. The refinish paint baking temperature is relatively low, 70, 80 degrees look.

Secondly, the color of the refinish paint is formulated before the repair. The reason is simple: Your car may have been on for several years, and the paint has started to fade, although you can't see it. If you park outside, the degree of fade in different directions will be slightly different - the relationship of the sun. To match as much as possible with the original color, you can only adjust it. Also, in order to avoid color differences as much as possible, even if you only need a small piece of paint, the entire factory will re-spray the whole piece.

For example, if there is a place on the door that needs to be filled, then to prevent the wiper from being used as the boundary, the first half or the second half of the door should be sprayed. In this way, if there is a little bit of color difference, it is not easy to see.

Also, when buying a car, if you want to be beautiful, you buy pearlescent paint (fortunately, domestic cars don't seem to have any car use). When you make up the paint, you are ready to cry. The directionality of the lacquered mica granules is hardly (or almost impossible) the same as before. Even if the paint does not have a slight color difference, the lacquer that is made up can be seen at a glance.

Now that computer coloring is under the circumstance of operators, the color difference between the lacquer and the original paint is not distinguishable by ordinary people's eyes. This can be assured. The key is: paint used, equipment used, and people's responsibility.

There is no possibility of using original paint to make up paint. But under normal circumstances, the depot will still recommend a designated refinish brand to a dedicated repair station. Good repair stations will also use good brands. Such as ici, such as Nippon. However, in small shops, even some less formal specialized repair stations may use cheap lacquer (if not saying they are false) for cost reduction considerations. At that time, the effect may be the same. Three months later, the color difference came. This, our users can hardly identify. Only repair plants that are reassured are available.

Although the baking temperature of the refinish paint is relatively low, it does not mean that there is no need to bake or replace it with other methods. If you find that the repair shop does not have a dedicated paint booth, use a small sunlamp instead. Change places as soon as possible! Unless you are driving a bus.

Also, on the production lines of regular automobile depots, spray paintings are carried out in dust-free workshops. Although many Chinese-made cars do not necessarily do this, it does not mean that this is not necessary. If you see the garage is dirty, it's grey. I suggest you change places. Otherwise, even if it looks good at the time, over time, I have seen the blistering and shelling of paint.

Refinishing paint, in addition to paying the money, I am afraid I can only pay attention to so much.

Speaking of paint maintenance. That is also important.

First of all, don't use a bucket of water to wash your car like a bus driver. In that case, there is only a degree of difference between the painter and Zhang Shapi. If it is raining or if the ash is thick, do not use wax or cloth ash. Simply wash the car.

Car washing, a lot of water washing is undoubtedly necessary. However, many times, the second child in the car wash likes to use a high-pressure water gun to flush the paint. In this case, high-pressure water may also damage the paint. Also, if you wash your car with a washing powder, it's not good to use a special car wash.

Although these injuries can not be seen twice. But as time goes by, the damage can not be ignored.

In addition, given that new cars tend to sell quickly. The car you got was probably just a few days out of the depot. The baking paint has a characteristic: it usually lags behind for a while to be really firm and hard. Therefore, the new car will not rush to wax. Three months later. Do not use hard waxes after three months. Make up the paint, do not wash your car within a week. It rains and there is no way.

Also, many new cars now spray a varnish on the outside of the paint. In this way, the paint surface is bright and beautiful, and it can also protect the paint surface. In this kind of car, you don't need to burn the bag to seal the glaze. Or what new car to do paint finish. In that way, you are spending money to reduce your car paint to the level of Poussin and Jetta.