Expose the inside story of painting

Revealing the inside story of spray painting

It is inevitable for us to scrape when driving, especially when a novice drives a new car and scratches it. This is called anxiety and distress. Some people will worry, when repairing, can the effect of this afterapplied car paint be the same as that of the original car paint?

this problem should be discussed from two aspects: materials and construction.

is the quality of the refinished car paint the same as that of the original car paint?

first of all, from the paint itself, the repair paint is completely different from the original paint, because their construction technology is different, one is manual spraying, and the other is production line robot spraying. Therefore, they have different requirements for the type of paint. The original paint is high-temperature paint, and the post-repair paint is low-temperature repair paint.

although the types are different, they all have their own product grades. For example, Mercedes-Benz's original paint and Xiali's original paint, the product grade of the paint he chose is definitely different. The same is true for repair paint. Different paint brands have different grades, and there are different specifications, such as his spraying environment, his ratio, what kind of gloss and thickness of paint film.

it depends on the construction site, and whether he can use high-grade paint for you. For example, PPG in the United States, BASF in Germany and Aksu in the Netherlands are all international brand-name car paints.

the quality is ok, will there be a difference in color effect?

this car paint, the color is not ready-made, it needs painting. This involves the process. The colorimeter measures the basic formula data, and the software will tell you how much to put in each basic color to adjust the color. Then, according to this, fine-tune it. First, spray a color plate, and then compare it with the original car repeatedly in different light environments. Moreover, when spraying the color plate, the spraying conditions such as spraying distance, paint ratio and air pressure should be the same as those when actually spraying the car. In short, there is a set of standard procedures to ensure the accuracy of colors.

and the problem of color difference, the original car also has color difference.

one is a car with the same color and different batches, and the colors will be different;

in addition, for example, the car body and bumper are not painted in the same car body, and some of them are even produced by supporting manufacturers, so his indicators will be slightly different. However, manufacturers will have standard specifications, and the color difference between its color and the standard version is generally required to be within the range of delta 5 (different for each manufacturer), which is indistinguishable with the naked eye.

touch-up paint is the same, because you can't be 1% the same at any time. For example, there will be metal particles in this metallic paint, and then in the process of spraying, the arrangement of the metals you spray this time is like this, and the arrangement of the metals will change in one direction next time. Then the color effect of his book will be slightly different.

but again, as long as the measurement is within a standard range, or in this case, you adopt the standard color matching process+transitional spraying process to solve it. Of course, this requires a high level of spraying for technicians. In this case, you can't tell it with the naked eye 1%, which is also in line with the requirements.

after a long time, will there be color difference in the repaired area?

For example, Ferrari and Mercedes-Benz, this type of car uses nano-ceramic varnish in the production process, which is a high-grade paint. If you can't use such a high grade when repairing, it is equivalent to repairing a glass on the diamond. That, such as the attenuation of luster and color, will be very different. But as long as you use the same grade of paint, its effect can still be guaranteed.

Let's talk about the construction process again. Are their methods the same for different vehicles and different places?

first of all, no matter what kind of car, as long as it leaves the factory, its standard process of afterpainting is the same, but some details are different.

Generally, it is divided into four major links,

1. Dismantling or repairing sheet metal;

2: substrate treatment before painting;

3: spray top coat;

4: polishing;

for example, if metal is damaged, it needs 1-2 layers of epoxy primer for rust prevention, 2-3 times of putty shaping, flatness restoration, 2-3 layers of intermediate primer, 2-3 layers of colored paint and 2-3 layers of varnish.

this process, in fact, does not have a high technical threshold, but it needs to pay great attention to details. There are dozens of small processes under each big process, and each step has corresponding specifications such as operating environment and so on.

to put it bluntly, it depends on whether the construction site is unclear about this process and whether it is completely implemented in accordance with this formal process.

what's the difference between a 4s shop, a professional repair shop and a roadside shop?

4s shops and professional repair shops will be more professional. Manual training, hardware equipment and process standards are more standardized.

Take this paint mixing as an example. It is provided by the paint supplier, and there will be technicians and paint mixers from the manufacturer to serve him.

Roadside shops are all tuned to zero, and they may not know what brand they are. Paint mixers are also tuned according to their own experience. Some people with good experience can adjust the color, but his ratio is not necessarily scientific. For example, I can adjust the color with five products, but he may use ten. Moreover, it was like this after spraying, but the color masterbatch in it was too complicated. I was the same in the sun, and then it was different when it was cloudy. It's the same in the workshop, but it's different when driving outside.

so if your car is good, don't go to a roadside shop to get it.

What about going to a 4s shop? His big industry, the luxury lounge, is expensive and expensive.

The workshop facilities of the professional repair shop are all right, but the money for those window-dressing things is saved, so the price is relatively cost-effective.

A brief summary

Having said so much, I think everyone has a number. The use of standard paint, coupled with strict construction operation procedures, can also achieve the same effect as the original car paint.

in other words, both materials and construction are indispensable. Even in the 4S shop, workers can't do anything about it.