What is a thickness gauge and what is it for?

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What is a thickness gauge and what is it for?

This is a very useful device that allows you to quickly determine whether an element was painted on a car or not. It measures the thickness of the paintwork from the device to the metal in microns, and a micron is a millionth of a millimeter, for example, the thickness of a human hair is 40-70 microns. To find out whether there was a color or not, you need to know how much the thickness of the paintwork should be in microns from the factory.

In fact, everything is simple here. 99% of the machines have a thickness of LCP from 80 to 170 microns. 1% of cars are 200-250 microns. This 1% is usually premium cars, expensive.

There are a lot of tables on the Internet that show the factory thickness of the paintwork of different machines. Often in practice we see small discrepancies with these tables in one direction or another, but this does not mean that the car was painted. I mean, the discrepancies are in the range of 10-20 microns. Usually readings above 170-190 microns mean that the element was painted. Up to 300 microns is often a cosmetic color, scratch, lapping from another car or column, without dents. If it is more than 300 microns, then the element was putty, then there was a dent and the body was leveled with putty. Dents are different, so the readings can be 300 microns, or they can be 1500 and 2000 microns.

As for the discrepancies in the thickness gauge readings on one machine, despite the fact that it was not painted, this is also normal. This means within the limits of the norm. It's not like there are 100 microns here, and 300 there.

Even when the car is new, there will be discrepancies, it is impossible to put a layer of paint exactly to the micron!

In addition, during the operation of the machine, various factors can affect the thickness of the paintwork – how often the car is washed and wiped, whether the owner often cleans snow from it with a brush, whether the body was polished, even the fact at which factory the car was assembled, in what year and from what batch it is.

How do I measure the car body? I advise you to start measuring from the roof, the probability that the roof was painted is lower than other elements. In addition, if the roof was not painted, then there will be just the indicators we need, from which we can start. Well, then we go through the rest of the body elements. I recommend measuring each element at several points, because there is a local color, not even the entire element. Also, do not forget about the racks. Most thickness gauges cannot check the thickness of the paintwork on the bumpers, because the bumper is plastic. This is a consumable that neither buyers nor sellers take into account. That's why he has a plastic bumper so that it can be inexpensively repainted and painlessly installed.

Not all thickness gauges can measure the thickness of the paintwork on non-ferrous metal. Some manufacturers make some body parts or the entire car body out of aluminum. If you are looking for just such a machine, then you need a thickness gauge that can help you.

There is another nuance, the body element can be replaced and the device will show values close to the factory ones, but most often the readings of the device will differ from the readings on other elements. A little up or down when the iron is just painted. For example, the replaced element will have 60-70 microns, and the factory values will be 100-120. Such elements can be calculated from damaged bolts, they can also be tinted so that they do not catch the eye.In general, guys, going back to our main question, if the car was not repainted, then there will still be discrepancies in the thickness gauge readings. If the element on our car was painted, I will definitely tell you about it in the video, we have nothing to hide.

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