Every compatriot, when going to a shopping center or a large store, probably paid attention to the fact that if at the entrance the visited "institution" has glass doors, then with the highest degree of probability some mysterious yellow circles. Why is this done and why spoil perfectly clean doors with "drawing"? The answer to this question, as is very often the case, is “hidden” from fellow citizens literally on the surface.
Glass transparent doors are very beautiful. And also dangerous. The sad practice eloquently indicates that such doors every now and then cause numerous injuries to citizens. The problem is that people walking in hats or thinking "about their own" often simply do not have time to notice the unfortunate door. Moreover, glass doors are often overlooked by people with low vision. As a result, broken noses, broken fingers and much more. To prevent this from happening, it was decided to make the doors more visible, including by drawing yellow circles on the glass surface.
Yellow color, by the way, was chosen in this case for a reason. The fact is that a person from birth is inclined to pay more attention to saturated colors. It's a biology issue. In addition to yellow, you can also use orange, blue, green, red. However, experiments show that the yellow color is perceived best of all. In addition, yellow, unlike some other colors, is equally well visible in any weather.
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These signs are applied not at all "out of the kindness of the soul", but in accordance with GOST. Signs must be at least 20 cm wide and at least 10 cm high if rectangular. If it is a circle, then its diameter must be at least 15 cm. Placed visibility enhancement symbols on moving parts of doors. Also, the signs should be at a height of 120-150 cm from the ground. If the store ignores the drawing of yellow circles, then it will violate the sanitary and epidemiological norms of the country, which means that its owners will face a serious fine.
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By the way, in most cases, yellow circles and rectangles on the doors are not paint, but stickers made of PVC-based polymer film.
If you want to know even more interesting things, then you should definitely read about 10 "NOT" in interior design that lead to failure.
A source: https://novate.ru/blogs/260420/54285/