Home » Radiation: Why Black Coloured Umbrella is Preferred in the Hot Sun

Radiation: Why Black Coloured Umbrella is Preferred in the Hot Sun

by admin
Radiation: Why Black Coloured Umbrella is Preferred in the Hot Sun

When it is raining most of us love going outside. We all need umbrellas, but have you noticed that 60 to 70 per cent of people’s umbrellas are made of dark or black fabric? Have you given any thought to the common preference for black umbrellas?


Black can absorb heat.


Without any doubt, rainy seasons were the original purpose of the umbrella.


However, why black umbrellas? 


  • It was discovered that umbrellas made of black cloth dried more quickly than those made of other colours of cloth did. 
  • Thus, employing black cloth in the construction of umbrellas became the norm. 
  • Because black or dark surfaces absorb more heat from their surroundings than lighter surfaces do, the drying process for the black fabric is sped up.


The insulation effect of the black umbrella is excellent.


  • A black body (e.g. heat, light, and ultraviolet) absorbs all radiation.
  • The blackbody spectrum is a common spectrum in which it emits radiation. 
  • The only factor affecting this spectrum’s distribution (and particularly the location of its maximum) is the black body’s temperature. 
  • So one can determine its temperature by simply looking at the colour of the black body (it will be far in the infrared for the umbrella, but is red or orange for lava for example).


The darker the umbrella’s colour, according to studies, the better. The greater the anti-ultraviolet effect, the lower the ultraviolet transmittance will be: the ultraviolet transmittance of a black umbrella is 5%; that of a navy, red, dark green, or purple umbrella ranges from 5% to 10%; and that of a green, reddish, light green or white umbrella ranges from 15% to 20%. As a result, dark umbrellas perform better against UV radiation.


The umbrella thus absorbs all of the sun’s radiation, heats up during this process, and emits the entire black body spectrum, which is primarily heat (the maximum being in the infrared). A black umbrella might therefore seem like a good choice for UV protection.


Black signifies something more than radiation

Radiation is a definite reason for making black umbrellas. However, there could be something more than radiation. 

Black holds significant meaning for humans.

  • The man dresses in formal black and white. 
  • The colour black represents solemnity, stability, mystery, and majesty. Moreover, the black hue is heavier. Despite the white being a light and airy colour, the formal suit and sense of frivolity are unmistakable. Yes, there are dark colours like black, grey, and blue.
  • In the film “James Bond,” Bond is required to enter the Royal Casino while dressed in a black dress. The most widespread language in the world is already men wearing black to formal events.


Black attire is required for all formal occasions, including weddings, sit-down dinners, and meetings with important clients. Also known as “Black Tie,” these are the standards used in the West for casual occasions.


Originally, an English translation of the French term “private noise,” black tie is now a formal dress code.


Considering that, the official name of the standard must include the word “black,” which the British and the French must do. Europe at the time believed that “black = formal.” The norm for women is frequently to dress in evening gowns, which are themselves dresses that highlight the beauty of the shoulders, chest, and arms. 


White Tie is more formal than Black Tie in terms of attire. Even though the name includes the colour white, men must wear a full black tuxedo jacket.


Later, the idea of Western-style clothing spread around the globe along with war and commercial globalisation. Black clothing has taken over as the dominant colour in fashion; much like English has become the global language.


Because it is a timeless, classic colour, black can be used as a formal symbol. A white umbrella will shine brightly if you hold one at this moment.


Everyone is aware that wearing black clothing will make you feel very hot. It is because of how well black absorbs heat. On the other hand, if a black umbrella is propped up on top of the head, the umbrella absorbs the heat, and people do not run into the ground. Consequently, the black umbrella’s insulation effect is excellent.

Also published on Medium.

You may also like