The light transmittance of car windows has been verified by more than one year of experimental tests and today is strictly defined by law. Violation of it leads not only to fines, but also fraught with serious accidents.
Oddly enough, there is no single law on the use of tinted glass on a car. If you want to subject the glass of your car to tinting, you have to be guided by three official documents at once. What does the law say?
Traffic Laws
If you open the section on the list of faults, as well as the conditions under which the operation of transport is prohibited, it turns out that the installation of tinted windows is one of the reasons why it is possible to prohibit the operation of the car. It is allowed to fix colored stripes on the upper part of the windshield, hang curtains or blinds on the rear windows (if both side rear-view mirrors are present). Mirror tinting is prohibited in general, and conventional tinting is possible with light transmission in accordance with "GOST 5727-88".
GOST 5727-88
This regulatory document regulates the technical conditions for the manufacture of glasses for use in land transport. According to the document, for windshields, light transmission is set at 75%, for non-windshields, but within the "field of view" - at 70%. The light transmission of other glasses that do not belong to the category of windscreens is not standardized. There is also an interesting addition, according to which glass colored in the mass should not distort the perception of red, yellow, blue, green, white. The Russian government slightly "modified" this document and released its own.
Technical safety regulations
The document (adopted in 2009, in September) defines the conditions for safe driving on wheeled vehicles. Here, too, mention is made of the need to observe light transmittance, however, already only 70%, for the windshield and front side windows. The rules for the sticker on the top of the windshield are described in more detail; the width should not exceed 14 cm. At the same time, for transport of categories N2, N3, M3 (these are buses, trucks, including heavy ones), the width of the film should not be more than the distance from the upper edge of the windshield to the upper limit of the wiper coverage area.
In conclusion, it is worth paying attention to the numbers that determine the light transmission of the film when it is purchased. There is a subtlety here; the value declared by the manufacturer when glued to the glass of a car may not correspond to the real percentage. The reason is that in the manufacture of auto glass of the "triplex" type, an intermediate film is used, which already initially reduces the degree of light transmission. Therefore, you should buy a film, the light transmission of which is not less than 75-80%.
