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Black is a color which results from the absence or complete absorption of visible light. It is an achromatic color, without hue, like white and gray. It is often used symbolically or figuratively to represent darkness. Black and white have often been used to describe opposites such as good and evil, the Dark Ages versus Age of Enlightenment, and night versus day. Since the Middle Ages, black has been the symbolic color of solemnity and authority, and for this reason is still commonly worn by judges and magistrates.Black was one of the first colors used by artists in neolithic cave paintings. It was used in ancient Egypt and Greece as the color of the underworld. In the Roman Empire, it became the color of mourning, and over the centuries it was frequently associated with death, evil, witches, and magic. In the 14th century, it was worn by royalty, clergy, judges and government officials in much of Europe. It became the color worn by English romantic poets, businessmen and statesmen in the 19th century, and a high fashion color in the 20th century. According to surveys in Europe and North America, it is the color most commonly associated with mourning, the end, secrets, magic, force, violence, evil and elegance.Black ink is the most common color used for printing books, newspapers and documents, as it provides the highest contrast with white paper and thus is the easiest color to read. Similarly, black text on a white screen is the most common format used on computer screens. As of September 2019, the darkest material is made by MIT engineers from vertically aligned carbon nanotubes.

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  1. B

    Hot black water coming out of bath tap in newly refurbished. Bathroom

    Hi, I hope someone can help. I’m hoping this isn’t a permanent problem. We’ve converted a gravity vented hot water system, into an unvented indirect hot water system to improve pressure in the house. The previous cylinders are in the loft now they’re in the garage next to the boiler. We...
  2. OneTwo

    Mystery Black Undergound Pipe Leak Repair Advice

    Hi All After having pooling water on my drive, I dug down around to find: Black pipe poly/plastic dug 450mm deep spraying water at mains pressure from small hole/crack The outside of pipe (measured with veneer caliper) at 23.5mm Pipe Runs under drive, along side of property and looks to go...
  3. A

    Clear slime and black bacteria seeping out of kitchen mixer joints

    My mother has been away on holiday for a few weeks and she has a kitchen mixer tap that has a very slow drip nothing significant - been like that for a couple of years. The mixer has a a long spout that can be rotated between sink and drain bowl. She left the house meticulously clean. I came to...
  4. A

    32mm Matt Black Metallic Waste Pipes - Where to Get?

    Evening all. Not sure if this is the most appropriate place to post this in the forum, happy to move if not. I'm looking for a metallic 32mm matt black waste pipe, to match up with a matt back trap. The pipe that comes with the trap is 400mm, which isn't long enough for my installation. I'd...
  5. E

    Connecting to black rubber mains pipe

    I have a cold mains in that is a black flexible rubber looking pipe. Please see photo 1. It is currently connected to a 22mm stopcock. I’d like to send it 90 deg to the right. This is so I can lower the shelf above it and have the mains come in at a more convenient place. See photo 2 (with...
  6. robwardinc

    Pinhole in Black Alkathene 17.5 3/8" under concrete driveway

    Pinhole in Black Alkathene 17.5 3/8" under concrete driveway. Hello, we have managed to 'dink' the mains water supply to our house, during some excavations for a drain. And we are hoping for some advice on the best way to proceed. The leak is only a pinhole, but after a few days it has escaped...
  7. C

    Black oily bits coming from hot tap

    Hello there. I wonder whether anyone could suggest what may be the issue with the hot water in my bathroom. I have asked four different plumbers who have come to the house to do work and none of them had a clue. Basically, when I turn on the hot tap on the bath, black bits come out in the...
  8. V

    What is this black box below boiler?

    Can anybody tell me what this solid metal box is below the condensing boiler in my daughter’s house. The boiler is a Remeha Quinta Pro 45 that has been condemned even though it is only eight years old. They have a Corgi contract and they have agreed to pay towards a new boiler as it is less than...
  9. phil hair

    ecotec pro 24 blackscreen

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  10. J

    How to connect this black pipe?

    Hi All, These push fit type pipes are in the bathroom, they twist but I was not able to disconnect the long 35mm black one - quite tight fit. Is there any compression type connector or flexible connector I can use to connect these two pieces or any transition to 40mm system? I have cut it to be...
  11. S

    Black Inlet pipe stopcock

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  12. L

    Black flow meters on new CH system

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    • LE4R
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    • america black flow flow meter meters new system underfloor heating usa
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    • Forum: USA
  13. P

    Black tank fed shower

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    • Thread
    • america black fed shower tank usa
    • Replies: 1
    • Forum: USA
  14. V

    Black slime in cistern

    My neighbour has a Siamp built in toilet cistern. He has a problem in that in the winter months he gets black slime building up in the cistern and coating the flush and inlet valves. He only has one toilet so no others to compare it with. Myself and his other neighbours with normal exposed...
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  15. M

    Black Granite Sink

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    • Thread
    • america black granite sink usa
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  16. T

    What's this black stuff?

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  17. K

    Black plastic water pipes

    Hi all. Hope I’m posting in the right place! I have a leaking water supply pipe in my house which is an unfamiliar type for me. It is a black plastic pipe with glued joints about 15mm diameter, which supplies our upstairs bathroom. See photo. the house was built around 1971 but there have been...
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  18. S

    Help with Convesa Black Twin Wall flue

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  19. D

    How To Stop Hot Water Tap Black Bits Debris?

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  20. B

    Advice Please - 40mm Solvent Weld in Black inc Tank connectors?

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