Car Paint Surface Thickness Standard

In the production of the automotive industry, automotive paint is regarded as one of the standards for measuring whether a car has excellent performance. The car will face different external environments for a long time, such as sun exposure, wind and rain, artificial scratches, etc. It is an over-acid and over-alkali environment that is indistinguishable to the naked eye, which means that a high-quality paint film must be waterproof and impermeable, high in hardness, scratch-resistant, corrosion-resistant acid and alkali-resistant, while maintaining high gloss and high wear resistance.
       Automotive paints need to meet these high requirements, many people think that the thicker the car paint surface, the better. The thickness of German cars is much higher than that of Japanese cars, some consumers think that German cars are better than Japanese cars. But in fact, this is wrong, because the car paint thickness has certain technical standards. So in this article, we will mainly talk about the relevant knowledge of automotive paint and the thickness of paint.

1. Why the car paint thickness is not as thick as possible?

Body painting is an important process in the automotive industry and its process is relatively complex. The coatings used in different stages will be different. These coatings have a protective and aesthetic function on the car body, but also on the car paint thickness.
       Regardless of the paint surface thickness, usually it will have four layers of paint, from the inside to the outside are the electrophoretic layer, the middle coat, the color paint layer and the varnish layer. The electrophoretic layer is to protect the main structure of the car from rust. The middle coating can help reduce the impact of sand and gravel on the car body and prevent the skin surface from peeling, fading and other phenomena due to the absorption of ultraviolet rays. The color paint layer is auxiliary coloring, the varnish layer is responsible for protecting the entire body appearance, similar to the role of the film.
       From the role of these four layers of paint, it can be seen that the thickness of the car paint is not the thicker the wear, but the hardness of the car paint. The higher the hardness, the more wear-resistant.
       When the new car leaves the factory, the car paint thickness is related to the car model, color and different parts of the car body. It is usually required to be between 120-180 microns thick and the car paint hardness is between 0.4 and 0.6. Therefore, this is why Japanese car paints look very thin, while German car paints look very thick. In fact, as long as they leave the factory, their car paint thickness is within the range of hard standards.

2. Why do we detect the car paint thickness?

(1) Determine the uniformity

Use the Linshang LS220 car paint meter to test the car paint surface of different parts of the car body. The value obtained by the measurement is to see whether the error is small and then determine whether the car paint surface thickness is uniform. The smaller the error, the higher the uniformity, which means that the body is better in various protection indicators.

(2) Determine whether to cut corners

The paint surface thickness of the new car is tested. If the thickness does not reach the specified 120 micrometers or more (90 micrometers for economic vehicles of less than 50,000 RMB), it can be considered that the car has been cutting corners during production.

(3) Determine whether the used car is an accident car

Some used car dealers will sell the car that has had an accident as a used car. In order to avoid buying an accident car, we can use the Linshang LS220 car paint meter to test the car paint thickness on different parts of the car body. If there are multiple locations where the paint thickness is more than 200 microns, it means that the car may had an accident. Because when the car is refurbished, the original paint surface will not be scraped off, but the paint surface is coated with refreshing paint, so the thickness usually exceeds 200 microns.
       Automobile paint seems to be ordinary and it is actually very knowledgeable. Testing the automobile paint thickness can help us judge the quality of the car. At the same time, to judge the quality of the paint, it is necessary to judge from the aspects of whether the hardness is high enough, the color is uniform. The thickness error of the paint surface is too large.