10 subjects who have received their colors not just

You may not know but many things you see every day, have certain colors for very specific reasons. It's not just a whim or a matter of taste.

Below we explain why toilet paper is white, hydrants, multi — colored, school bus yellow, and more.

All seen in American movies yellow buses, which take children in the morning and transported them to school. But why yellow? It turns out that the reason is quite prosaic. The decision that school transport should be this color took off in the US back in 1939, arguing that it attracts attention and it is easy to see by other drivers even in the dark.

Taxis have the same color for the same reason. Yellow cars stand out sharply against the others, and this color makes them easily recognizable.

Most passenger planes painted white to reflect sunlight. This little trick helps to reduce the damage caused by the sun's rays and prevent overheating of the aircraft. In addition, thanks to the white color decreases the time required for cooling when the aircraft is at the airport.

In some countries, the fire hydrants are painted in different colors to show how many gallons of water per minute they can produce. In addition, different hydrants used to extinguish different types of fire, depending on their size. The most popular colours — red, orange, green, and blue.

Rubber used for tire production is actually white, but to prolong is added to the carbon black. Was he "guilty" in the fact that the tires become black shade. Carbon black increases the strength and durability of the tire, removing the heat and protecting them from ultraviolet radiation.

Contrasting black and white colors make the "Zebra" noticeable even from a far distance. It gives drivers enough time to slow down and let people cross the street. In addition, these 2 contrasting colors also help pedestrians to stand out from their background, which helps to prevent accidents.

When soccer balls were made of plastic, they were all white. However, Adidas decided to add to them also black. Black-and-white balls were easier to see on the TV screen, because the picture on the TV at the time was also black and white.

What choice of colours for a traffic light fell on red, yellow and green, due to several factors. First, the color red has always been associated with danger and green, conversely, was seen quietly. Secondly, red is the color of the long solar waves, so it can be seen even from a distance. Yellow was selected because it has a shorter wave than the red, but not as short as the green.

Often toilet paper is exactly white in color, although in raw form it looks brown. To whiten the paper manufacturers have several reasons. Main — the same as for the toilets. The color white is associated with purity and looks more natural than brown. In addition, the bleaching process removes the polymer lignin, which makes the wood fibres dense. The removal of lignin extends the "life" of the coil, so it can be stored for long periods in the warehouse and sell it on the shelves.

You often see colored toilet paper. Paint the rolls different colors began in the mid-twentieth century, so people can combine them with bathroom interior. But soon the popularity of this paper came to naught, as many doctors have insisted on the dangers of dyes to health.

Have you noticed that almost all of the application icons for social networks are blue? Developers use it, as it is closely linked with intelligence and reason, and thus an act of communication. In addition, the color blue resonates with the sense of reliability, trust and stability. For this reason, many posters during the election campaign, too blue, or blue colors.